Kinetic Models of Sorption of Copper (Ii) Ions on Ionite Based on Polyacrylonitrile

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Orzikulov, D. Gafurova, D. Shakhidova, M. Makhkamov, I. Khudoyberdiyev This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3170763/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Kinetic models were used to analyze the mechanism of absorption of Cu 2+ ions from artificial solutions by newly obtained polyampholyte containing nitrogen and phosphorus based on polyacrylonitrile. It was determined that the obtained kinetic parameters obey the pseudo-second-order model of the process, and that the sorption of Cu 2+ ions to polyampholyte based on polyacrylonitrile carried at in more degree than other ions. polyacrylonitrile polyampholite sorption ionite rate constant kinetics pseudo first and second kinetic models copper (II) ion Figures Figure 1 Figure 2 Figure 3 Introduction Modern technologies are widely used in the rapid development of industrial production in the world and in solving environmental problems, the production of competitive and environmentally friendly products. It is especially evident in the preparation of water on an industrial scale, in the extraction of precious and non-ferrous metals from technological solutions, the treatment of wastewater using modern, including ion changes technologies. Due to its environmental friendliness, low cost, ease of application and the availability of multiple regeneration opportunities, ionizing materials are considered of great importance in the implementation of these processes [ 1 – 2 ]. Owing to their high selectivity properties ions exchange materials have the potential to be widely used in all areas of science and manufacturing practice. With them, one of the pressing social and environmental problems is solvation of the problem of environmental protection [ 3 – 5 ]. With the expansion and development of industrial enterprises, the need in anion exchange and complex-forming sorbents is increased. The synthesis of these sorbents is carried out by modifying by their functional groups by various chemical reagents end then modified of sorbents have used in industrial enterprises [6–8]. Almost all of the various heavy metals can be found in the effluent from many industries. Especially the increased concentrations of such ions as Co 2+ , Cr 3+ , Cu 2+ , Ni 2+ , Pb 2+ , Zn 2+ in such waters has a detrimental effect on the environment. This requires a thorough examination of the composition of industrial waters and their purification [ 9 – 10 ]. For this purpose, this article analyzes the kinetics and thermodynamics of the sorption process using the kinetic models of studying the sorption of copper(II) ions to ionite obtained on the basis of polyacrylonitrile, as a result PPF-1 ionite obtained by sequential chemical modification of polyacrylonitrile with polyethylenpoliamine and phosphitic acid can be used as has been shown as selective sorbent for copper(II) ions. LITERATURE ANALYSIS AND METHODOLOGY There are several methods for extracting heavy and precious metals from wastewater, including filtration, coagulation, and ions exchange. Today among these methods, the ions exchange method is one of the most effective. Ions exchange technologies for purification industrial waters from metal ions is an effective method even at low concentrations of metal ions. The main importance of the demands for ionic sorbents obtained on the basis of local raw materials are their low purchase costs and high efficiency. The initial compounds in the synthesis of ionites react with polyethylene polyamine and α-halogen-β, γ-epoxy compounds, for example, EXG (epichlorohydrin) and even tertiary amino groups, so it has a high efficiency for preparing ionites with strong basicity. EDE-10P, widely used in industry, is obtained by reacting the ion exchanger EXG with PEPA. It belongs to ionites with polyfunctional groups, and since they contain secondary and tertiary amino groups and quaternary ammonium groups, they exhibit medium and even strong basic properties. EDE-10P has the property of forming a complex, it is used in water purification preparation from organic salts, it is chemically stable against acids and alkalis, but oxidizing agents dissolved in water can cause it’s degradation. The thermal stability of anionite is also low (76.9%) [ 11 ]. Polyampholytes with many chelating groups, in particular, selective sorbents containing ionites with nitrogen and phosphorus groups, are becoming increasingly important in environmental protection, high-purity metal synthesis, waste-free technology, extraction of valuable components from wastewater and complex multicomponent solutions. Their high selectivity towards heavy metal ions is explained by the stability of the formed complex compounds [ 12 ]. Chemical modification of PAN fiber with dimethylhydrazine was carried out in aqueous solutions of 1,1-dimethylhydrozine, where the -SN groups were partially hydrolyzed. The authors proved the effect of carboxyl groups on the hydrolysis reaction of polymeric nitrile groups. Based on IR-spectroscopic studies the degree of chemical change of -SN groups was determined: $$Х=\frac{D}{{D}_{0}}\bullet 100\%$$ where: X is the degree of substitution of -CN groups after chemical modification, D is the intensity of the valence vibration lines of -C ≡ N groups of the initial sample, cm; D 0 is intensity of valence vibration lines of -C ≡ N groups of the modified sample, cm -1 . Anion exchange materials with a static exchange capacity of 3.2 mg-eq/g were obtained after partial modification of hydroxylamine-activated PAN fiber (SAS = 1.0 mg-eq/g) with dimethylhydrazine [ 13 ]. In this regard, ionite synthesized on the basis of polyacrylonitrile and vermiculite, which is local raw–material, has a polyampholytic nature, contains both nitrogen and carboxyl groups, and it can be considered as one of the good absorbents for the sorption of metal ions from industrial waters [ 14 ]. Both ion– exchange and chelation processes are observed simultaneously in polyampholytes containing nitrogen and phosphorus. Such polymer materials are characterized by a high sorption capacity and selectivity to a number of ions of heavy and non-ferrous metals, which is due to the polydentate nature of the polymer chelating agent and the chelating effect in the formation of complexes with the participation of amino- and phosphite groups [ 15 ]. Typically, such polycomplexons are prepared by modifying nitrogen-containing anion exchangers with various phosphorous substances. In the presnted work, the material of anion exchange sorbent PPA-1 was used as a polymer containing primary and secondary amino groups and used for subsequent modification. In several works, it was shown that the sorption capacity of ionites to heavy metals depends on the pH, concentration of the solution and temperature. The absorption power of polyampholyte obtained on the basis of PAN depends on temperature (to heavy metals (Mn(II), Cd(II), Cu(II), Pb(II), Ni(II), Zn(II), Co(II), Cr(III), Ca(II) and Mg(II)) were studied. Absorption capacity of Cd(II), Cu(II), Cr(III), Pb(II) and Zn(II) on modified vermiculite was found to increase with increasing temperature. In this work the possibilities of absorption of copper (II) ions on sorbents based on PAN and vermiculite were investigated. In this scientific work, the possibility of using PAN-based polyampholytes containing nitrogen and phosphorus as an absorbent of copper ions was investigated. For this, polyacrylonitrile-based ionite was used to extract non-ferrous metal ions from artificial solutions. The influence of various factors on the mechanisms of Cu 2+ ion sorption processes on ionite was studied. RESULTS AND DISCUSSION The sorption of Cu 2+ ions from artificial solutions to ionite obtained on the basis of polyacrylonitrile fiber was studied. For this purpose, CuSO 4 ∙5H 2 O crystalline hydrates were used to prepare solutions of Cu 2+ ions in the concentration range of 0.075 − 0.0125 mol·l -1 , and the sorption of metal ions from these solutions was studied. For this 0.2 g of dry sorbent with a static exchange capacity of 3.2 meq/g HCl and a static exchange capacity of 5.6 meq/g for NaOH was weighed on an analytical balance and a 250 ml conical were placed in flasks and CuSO 4 solutions were poured from 100 ml. Changes in the concentration of metal ions in solutions before and after sorption were studied spectrophotometrically using a UV-5100 UV/VIS spectrophotometer. The amount of metal ions absorbed by the sorbent was calculated by the following equation: X- is the amount of absorbed ions in mole, m - sorbent mass, g, C 0 and Cτ are the concentrations of ions in the solution before and after sorption, g/l, V - solution volume, l, M- is the molecular mass of CuSO 4 , g/mol. As known from the literature, kinetic models are used to determine the mechanism of the sorption process (chemical reaction rate, diffusion control, and mass transfer). In recent years, various kinetic models have been used, including pseudo-first-order, pseudo-second-order, and several others. For this purpose, polyampholyte containing nitrogen and phosphorus was used, based on polyacrylonitrile, with a SAS value of 5.6 meq/g for sodium hydroxide and SAS value of not less than 3.2 meq/g for hydrochloric acid. The following kinetic models were used in this work. A pseudo-first-order kinetic model The pseudo-first-order kinetic model is represented by the following Lagergren equation: where: q t and q e are the amounts of metals sorbed by the sorbent at a certain time and at equilibrium (mg/g); k 1 is the rate constant (min-1) of the first-order sorption process and is the angular value of the slope of the intercept in the linear graph of log(q e -q t ) and t against time, i.e. - k 1 /2.303. The kinetics of Cu 2+ ion sorption on PAN-based polyampholyte was evaluated by finding the pseudo first-order kinetic parameters from the log(q e -q t )-t dependence (Fig. 1 ). Also, the kinetics of Cu 2+ ion sorption on PAN-based polyampholyte was evaluated by finding pseudo second-order kinetic parameters. A pseudo-second-order kinetic model The pseudo-second-order kinetic model is represented by the following equation: The initial sorption rate (t = 0) is found as follows In the given equations, k 2 is the rate constant, qe is the amount of metal ions absorbed by a certain mass of sorbent (mg g -1 ), and t-time (minutes). The kinetics of Cu 2+ ion sorption onto PAN-based polyampholyte was evaluated by finding the pseudo second-order kinetic parameters from the t/q e - t dependence graph. Figure 2 . The rate constants (k 1 and k 2 ) and correlation coefficients (R 2 ) found using the above Fig. 2 for the kinetics of Cu 2+ ion sorption onto PAN-based polyampholyte are presented in the table below. Activation energy of sorption The change in the value of the adsorption constant in solutions under the influence of temperature was expressed by the Arrhenius equation [ 15 ]. where: A 0 is the exponential factor, E a is the activation energy, and k 2 (g/mg min) is the pseudo-second-order kinetic constant at different temperatures. A plot of lnk 2 vs 1/T is plotted to find the activation energy Ea. Adsorption of Cu 2+ ions on PAN-based polyampholyte increased with temperature in the range of 293-313K. A plot of lnk 2 and 1/T was plotted to find the activation energy during sorption (Fig. 3 ). The sorption activation energy values calculated for the absorption of Cu 2+ ion on PAN-based polyampholyte in the given Fig. 3 are presented in the following table, from which it can be seen that the kinetics of the sorption process of Cu 2+ ions to PAN-based polyampholyte is closer to the integrity of the data of the second-order model compared to the first-order model. The results of the first-order model parameters showed that the absorption of Cu 2+ ions into the polyampholyte was rapid at the beginning, and then the rate of sorption slowed down, what can be explained by the accumulation of metal ions on the surface of the adsorbent and the balance between the ions. In the graph of the second-order sorption process (Fig. 2 ), the correlation coefficient is close to the first-order adsorption correlation coefficient (R 2 ), and the values of the kinetic parameters in the table indicate that the absorption of Cu 2+ ions into polyampholyte obtained on the basis of PAN obeys to the second-order adsorption kinetics. This means that phosphite groups in ionite have an effect on the sorption process along with the nature of ions. Table Kinetic parameters and activation energy of Cu 2+ ion sorption on PAN-based polyampholyte. Pseudo second order Pseudo first order E a kJ/mol C 0 mg/l q ex mg/l q cal mg/l R 2 k 2 g/mg min. h g/mg min. q cal mg/g R 2 k 1 min − 1 8 153,1 769,2 0,872 0.000015 3,49 527,8 0,888 -0,090047 22,942 16 164,7 384,6 0,882 0,000036 5,38 491,7 0,939 -0,0930412 32 177,9 344,8 0,963 0,000057 6,79 507,4 0,931 -0,0928109 48 187,8 312,5 0,991 0,000085 8,25 501,3 0,910 -0,0907382 Conclusion In this kinetic study the sorption of copper (II) ions from artificial solutions to new polyampholyte containing nitrogen and phosphorus based on PAN was studied at different initial concentrations and temperatures. It was shown that the sorption of Cu 2+ ions to polyampholyte obtained on the basis of PAN have influenced metal ions as well as nitrogen and phosphorus groups in the sorbent. The activation energy of metal ions during sorption is 22,943 kDj/mol. The sorption ions of Cu 2+ is based on the electrostatic interaction between them and –PO 3 H 2 - groups on the ionite surface. From solutions containing metal ions, the hydrated of Cu 2+ ions sorption is higher. Declarations Ethical approval. Not applicable. Competing interests. No, I declare that the authors have no competing interests as defined by Springer, or other interests that might be perceived to influence the results and/or discussion reported in this paper. Authors` contributions. The main experiments were carried out by the authors B. Orzikulov and Khudoyberdiyev. Authors Gafurova and Shakhidova prepared the main text of the article.The author Makhkamov performed the calculations of the obtained results. Funding. The authors did not receive support from any organization for the submitted work. Avaibility of data and materials. All data generated or analysed during this study are included in this published article. References Ivanov V. A., Gorshkov V. I. 70 years of the history of the production of ion-exchange resins. // Sorption and chromatographic processes. - 2006. - V.6. - Issue 1. - S. 5-31. A. E. Tarasova, A. A. Grishchuk, S. V. Karpov, Yu. V. Podval’naya, A. V. Chernyak, N. O. Garifulin, E. R. Badamshina. Study of the Formation of Hyperbranched Polyacrylonitrile under the Action of a New Initiating System Based on Bicyclic Tertiary Amine and Ethylene Oxide // Polymer Science, Series B, 2020, Vol. 62, No. 2, pp. 85–93 Madusmanova N.K., Khalilova L.M., Zhumaeva E.S., Smanova Z.A., Gafurova D.A., Tozhimukhamedov K.S. Nitrosonaphthol Derivatives as Analytical Reagents for Cobalt Ions // Journal of Analytical Chemistry, 2022, 77(1), pp. 26–34. B. Bandrabur, R. Tataru-Fărmuş, L. Lazăr, G. Gutt «Аpplication of a strong acid resin as ionexchange material for water softening – Equilibrium and thermodynamic analysis». Scientific Study & Research.Chemistry & Chemical Engineering, Biotechnology, Food Industry 2012, 13 (4), p. 361-370 Inamuddin M.L. Ion Exchange Technology I: Theory and Materials. - New York – London: Springer Dordrecht Heidelberg, 2012. - 560 p. Bekchanov D.J., Sagdiyev N.J., Mukhamediev M.G. Sdudy sorption of hravy metals nitrogen- and-phosphorus containing polyampholytes. //journal American Journal of Polimer Scean America.2016 N.6. P. 46-49 Parshina I.N., Stryapkov A.V. Study of the process of desorption of copper and zinc from the cation exchanger KU-2×8// Bulletin of OSU, 2004. -№1. pp. 97-100. Tursunmuratov, O. Kh. Sorption of intermediate metal ions on vermiculite-based ionite under static conditions. Science and Education, 3(12), 182-188. Makhkamov B., Makhkamova N., Shakhidova D., Gafurova D. Adsorption of Benzene Vapor in Polyacrylonitrile (PAN)/(VMT) Vermiculite Composite Materials // AIP Conference Proceedings, 2022, 2432, 050047. Nishat Nahid, Ahmad Sharif, Ahamad Tansir. // Synthesis, characterization and antimicrobial studies of newly developed metal-chelated epoxy resins //. Appl. Polym. Sci. - 2006. - Vol. 101. № 3. - P. 1347-1355. Smanova, Z.A., Gafurova, D.A., Savchkov, A.V. //Disodium 1-(2-pyridylazo)-2-oxynaphthalene-3,6-disulfonate: An immobilized reagent for iron (III) determination// Russian Journal of General Chemistrythis link is disabled, 2011, 81(4), P. 739–742. Bobomurodova, M.S., Ashirov, M.A., Gafurova, D.A., Khalilova, L.M., Zhumaeva, E.Sh. Polymer sorbents from “nitron fiber waste” // NeuroQuantology, 2021, 19(7), pp. 64–71. Rustamov, M.K., Gafurova, D.A., Karimov, M.M., Bekchonov, D.Z., Mukhamediev, M.G. // Application of ion-exchange materials with high specific surface area for solving environmental problems// Russian Journal of General Chemistry, 2014, 84(13), pp. 2545–2551 Jurayev M., Khushvaktov S., Botirov S., Bekchanov D., Mukhamediev M. Kinetics of Sorption of Ca (II) And Mg (II) Ions from Solutions to a New Sulphocathionite. International Journal of Advanced Science and Technology Vol. 29, No. 7, (2020), pp. 3395-3401 Additional Declarations No competing interests reported. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-3170763","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":221981382,"identity":"43f2fda5-8b75-4bda-b4eb-6aa256b123b5","order_by":0,"name":"B. 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Khudoyberdiyev","email":"","orcid":"","institution":"National University of Uzbekistan","correspondingAuthor":false,"prefix":"","firstName":"I.","middleName":"","lastName":"Khudoyberdiyev","suffix":""}],"badges":[],"createdAt":"2023-07-14 13:59:18","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-3170763/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-3170763/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":40913824,"identity":"c1e85083-a2f1-4e3f-a07b-525dd6847fd4","added_by":"auto","created_at":"2023-08-01 22:55:10","extension":"png","order_by":1,"title":"Figure 1","display":"","copyAsset":false,"role":"figure","size":84048,"visible":true,"origin":"","legend":"\u003cp\u003eA pseudo-first-order kinetic model of Cu\u003csup\u003e2+\u003c/sup\u003e ions sorption on PAN-based polyampholyte\u003c/p\u003e","description":"","filename":"1.png","url":"https://assets-eu.researchsquare.com/files/rs-3170763/v1/35fa1258c847ce657c89f44c.png"},{"id":40913826,"identity":"a2204dd4-96b6-431a-a8e2-ad2054a59d28","added_by":"auto","created_at":"2023-08-01 22:55:11","extension":"png","order_by":2,"title":"Figure 2","display":"","copyAsset":false,"role":"figure","size":97782,"visible":true,"origin":"","legend":"\u003cp\u003eA pseudo-second-order kinetic model of Cu\u003csup\u003e2+\u003c/sup\u003e ions sorption on PAN-based polyampholyte.\u003c/p\u003e","description":"","filename":"2.png","url":"https://assets-eu.researchsquare.com/files/rs-3170763/v1/be7a607a0e16d05e9f4c6460.png"},{"id":40913825,"identity":"0192d616-780c-4526-83be-378322597ef5","added_by":"auto","created_at":"2023-08-01 22:55:10","extension":"png","order_by":3,"title":"Figure 3","display":"","copyAsset":false,"role":"figure","size":55838,"visible":true,"origin":"","legend":"\u003cp\u003eDependence of lnk\u003csub\u003e2\u003c/sub\u003e and 1/T for adsorption activation energy\u003c/p\u003e","description":"","filename":"3.png","url":"https://assets-eu.researchsquare.com/files/rs-3170763/v1/8bdbc5a05735c59ebbaf5e68.png"},{"id":40914836,"identity":"b0d79179-40db-44ec-b189-4ff152e6f3ff","added_by":"auto","created_at":"2023-08-01 23:11:13","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":470158,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-3170763/v1/5fc7d1b9-dba6-4734-959a-5b4291c14155.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"\u003cp\u003eKinetic Models of Sorption of Copper (Ii) Ions on Ionite Based on Polyacrylonitrile\u003c/p\u003e","fulltext":[{"header":"Introduction","content":"\u003cp\u003eModern technologies are widely used in the rapid development of industrial production in the world and in solving environmental problems, the production of competitive and environmentally friendly products. It is especially evident in the preparation of water on an industrial scale, in the extraction of precious and non-ferrous metals from technological solutions, the treatment of wastewater using modern, including ion changes technologies. Due to its environmental friendliness, low cost, ease of application and the availability of multiple regeneration opportunities, ionizing materials are considered of great importance in the implementation of these processes [\u003cspan citationid=\"CR1\" class=\"CitationRef\"\u003e1\u003c/span\u003e\u0026ndash;\u003cspan citationid=\"CR2\" class=\"CitationRef\"\u003e2\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eOwing to their high selectivity properties ions exchange materials have the potential to be widely used in all areas of science and manufacturing practice. With them, one of the pressing social and environmental problems is solvation of the problem of environmental protection [\u003cspan additionalcitationids=\"CR4\" citationid=\"CR3\" class=\"CitationRef\"\u003e3\u003c/span\u003e\u0026ndash;\u003cspan citationid=\"CR5\" class=\"CitationRef\"\u003e5\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eWith the expansion and development of industrial enterprises, the need in anion exchange and complex-forming sorbents is increased. The synthesis of these sorbents is carried out by modifying by their functional groups by various chemical reagents end then modified of sorbents have used in industrial enterprises [6\u0026ndash;8].\u003c/p\u003e \u003cp\u003eAlmost all of the various heavy metals can be found in the effluent from many industries. Especially the increased concentrations of such ions as Co\u003csup\u003e2+\u003c/sup\u003e, Cr\u003csup\u003e3+\u003c/sup\u003e, Cu\u003csup\u003e2+\u003c/sup\u003e, Ni\u003csup\u003e2+\u003c/sup\u003e, Pb\u003csup\u003e2+\u003c/sup\u003e, Zn\u003csup\u003e2+\u003c/sup\u003e in such waters has a detrimental effect on the environment. This requires a thorough examination of the composition of industrial waters and their purification [\u003cspan citationid=\"CR8\" class=\"CitationRef\"\u003e9\u003c/span\u003e\u0026ndash;\u003cspan citationid=\"CR9\" class=\"CitationRef\"\u003e10\u003c/span\u003e]. For this purpose, this article analyzes the kinetics and thermodynamics of the sorption process using the kinetic models of studying the sorption of copper(II) ions to ionite obtained on the basis of polyacrylonitrile, as a result PPF-1 ionite obtained by sequential chemical modification of polyacrylonitrile with polyethylenpoliamine and phosphitic acid can be used as has been shown as selective sorbent for copper(II) ions.\u003c/p\u003e"},{"header":"LITERATURE ANALYSIS AND METHODOLOGY","content":"\u003cp\u003eThere are several methods for extracting heavy and precious metals from wastewater, including filtration, coagulation, and ions exchange. Today among these methods, the ions exchange method is one of the most effective. Ions exchange technologies for purification industrial waters from metal ions is an effective method even at low concentrations of metal ions.\u003c/p\u003e \u003cp\u003eThe main importance of the demands for ionic sorbents obtained on the basis of local raw materials are their low purchase costs and high efficiency.\u003c/p\u003e \u003cp\u003eThe initial compounds in the synthesis of ionites react with polyethylene polyamine and α-halogen-β, γ-epoxy compounds, for example, EXG (epichlorohydrin) and even tertiary amino groups, so it has a high efficiency for preparing ionites with strong basicity. EDE-10P, widely used in industry, is obtained by reacting the ion exchanger EXG with PEPA. It belongs to ionites with polyfunctional groups, and since they contain secondary and tertiary amino groups and quaternary ammonium groups, they exhibit medium and even strong basic properties. EDE-10P has the property of forming a complex, it is used in water purification preparation from organic salts, it is chemically stable against acids and alkalis, but oxidizing agents dissolved in water can cause it\u0026rsquo;s degradation. The thermal stability of anionite is also low (76.9%) [\u003cspan citationid=\"CR10\" class=\"CitationRef\"\u003e11\u003c/span\u003e].\u003c/p\u003e \u003cp\u003ePolyampholytes with many chelating groups, in particular, selective sorbents containing ionites with nitrogen and phosphorus groups, are becoming increasingly important in environmental protection, high-purity metal synthesis, waste-free technology, extraction of valuable components from wastewater and complex multicomponent solutions. Their high selectivity towards heavy metal ions is explained by the stability of the formed complex compounds [\u003cspan citationid=\"CR11\" class=\"CitationRef\"\u003e12\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eChemical modification of PAN fiber with dimethylhydrazine was carried out in aqueous solutions of 1,1-dimethylhydrozine, where the -SN groups were partially hydrolyzed. The authors proved the effect of carboxyl groups on the hydrolysis reaction of polymeric nitrile groups. Based on IR-spectroscopic studies the degree of chemical change of -SN groups was determined:\u003cdiv id=\"Equa\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equa\" name=\"EquationSource\"\u003e\n$$Х=\\frac{D}{{D}_{0}}\\bullet 100\\%$$\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere: X is the degree of substitution of -CN groups after chemical modification, D is the intensity of the valence vibration lines of -C\u0026thinsp;\u0026equiv;\u0026thinsp;N groups of the initial sample, cm; D\u003csub\u003e0\u003c/sub\u003e is intensity of valence vibration lines of -C\u0026thinsp;\u0026equiv;\u0026thinsp;N groups of the modified sample, cm\u003csup\u003e-1\u003c/sup\u003e.\u003c/p\u003e \u003cp\u003eAnion exchange materials with a static exchange capacity of 3.2 mg-eq/g were obtained after partial modification of hydroxylamine-activated PAN fiber (SAS\u0026thinsp;=\u0026thinsp;1.0 mg-eq/g) with dimethylhydrazine [\u003cspan citationid=\"CR12\" class=\"CitationRef\"\u003e13\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eIn this regard, ionite synthesized on the basis of polyacrylonitrile and vermiculite, which is local raw\u0026ndash;material, has a polyampholytic nature, contains both nitrogen and carboxyl groups, and it can be considered as one of the good absorbents for the sorption of metal ions from industrial waters [\u003cspan citationid=\"CR13\" class=\"CitationRef\"\u003e14\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eBoth ion\u0026ndash; exchange and chelation processes are observed simultaneously in polyampholytes containing nitrogen and phosphorus. Such polymer materials are characterized by a high sorption capacity and selectivity to a number of ions of heavy and non-ferrous metals, which is due to the polydentate nature of the polymer chelating agent and the chelating effect in the formation of complexes with the participation of amino- and phosphite groups [\u003cspan citationid=\"CR14\" class=\"CitationRef\"\u003e15\u003c/span\u003e]. Typically, such polycomplexons are prepared by modifying nitrogen-containing anion exchangers with various phosphorous substances. In the presnted work, the material of anion exchange sorbent PPA-1 was used as a polymer containing primary and secondary amino groups and used for subsequent modification.\u003c/p\u003e \u003cp\u003eIn several works, it was shown that the sorption capacity of ionites to heavy metals depends on the pH, concentration of the solution and temperature. The absorption power of polyampholyte obtained on the basis of PAN depends on temperature (to heavy metals (Mn(II), Cd(II), Cu(II), Pb(II), Ni(II), Zn(II), Co(II), Cr(III), Ca(II) and Mg(II)) were studied. Absorption capacity of Cd(II), Cu(II), Cr(III), Pb(II) and Zn(II) on modified vermiculite was found to increase with increasing temperature. In this work the possibilities of absorption of copper (II) ions on sorbents based on PAN and vermiculite were investigated.\u003c/p\u003e \u003cp\u003eIn this scientific work, the possibility of using PAN-based polyampholytes containing nitrogen and phosphorus as an absorbent of copper ions was investigated. For this, polyacrylonitrile-based ionite was used to extract non-ferrous metal ions from artificial solutions. The influence of various factors on the mechanisms of Cu\u003csup\u003e2+\u003c/sup\u003e ion sorption processes on ionite was studied.\u003c/p\u003e"},{"header":"RESULTS AND DISCUSSION","content":"\u003cp\u003eThe sorption of Cu\u003csup\u003e2+\u003c/sup\u003e ions from artificial solutions to ionite obtained on the basis of polyacrylonitrile fiber was studied. For this purpose, CuSO\u003csub\u003e4\u003c/sub\u003e∙5H\u003csub\u003e2\u003c/sub\u003eO crystalline hydrates were used to prepare solutions of Cu\u003csup\u003e2+\u003c/sup\u003e ions in the concentration range of 0.075\u0026thinsp;\u0026minus;\u0026thinsp;0.0125 mol\u0026middot;l\u003csup\u003e-1\u003c/sup\u003e, and the sorption of metal ions from these solutions was studied. For this 0.2 g of dry sorbent with a static exchange capacity of 3.2 meq/g HCl and a static exchange capacity of 5.6 meq/g for NaOH was weighed on an analytical balance and a 250 ml conical were placed in flasks and CuSO\u003csub\u003e4\u003c/sub\u003e solutions were poured from 100 ml. Changes in the concentration of metal ions in solutions before and after sorption were studied spectrophotometrically using a UV-5100 UV/VIS spectrophotometer. The amount of metal ions absorbed by the sorbent was calculated by the following equation:\u003c/p\u003e\n\u003cp\u003e\u003cimg src=\"data:image/png;base64,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\" height=\"54\" width=\"214\"\u003e\u003c/p\u003e\n\u003cp\u003eX- is the amount of absorbed ions in mole,\u003c/p\u003e\n\u003cp\u003em - sorbent mass, g,\u003c/p\u003e\n\u003cp\u003eC\u003csub\u003e0\u003c/sub\u003e and C\u0026tau; are the concentrations of ions in the solution before and after sorption, g/l,\u003c/p\u003e\n\u003cp\u003eV - solution volume, l,\u003c/p\u003e\n\u003cp\u003eM- is the molecular mass of CuSO\u003csub\u003e4\u003c/sub\u003e, g/mol.\u003c/p\u003e\n\u003cp\u003eAs known from the literature, kinetic models are used to determine the mechanism of the sorption process (chemical reaction rate, diffusion control, and mass transfer). In recent years, various kinetic models have been used, including pseudo-first-order, pseudo-second-order, and several others. For this purpose, polyampholyte containing nitrogen and phosphorus was used, based on polyacrylonitrile, with a SAS value of 5.6 meq/g for sodium hydroxide and SAS value of not less than 3.2 meq/g for hydrochloric acid.\u003c/p\u003e\n\u003cp\u003eThe following kinetic models were used in this work.\u003c/p\u003e\n\u003cdiv id=\"Sec4\" class=\"Section2\"\u003e\n \u003ch2\u003eA pseudo-first-order kinetic model\u003c/h2\u003e\n \u003cp\u003eThe pseudo-first-order kinetic model is represented by the following Lagergren equation:\u003c/p\u003e\n \u003cp\u003e\u003cimg src=\"data:image/png;base64,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\" width=\"236\" height=\"54\"\u003e\u003c/p\u003e\n \u003cp\u003ewhere: q\u003csub\u003et\u003c/sub\u003e and q\u003csub\u003ee\u003c/sub\u003e are the amounts of metals sorbed by the sorbent at a certain time and at equilibrium (mg/g);\u003c/p\u003e\n \u003cp\u003ek\u003csub\u003e1\u003c/sub\u003e is the rate constant (min-1) of the first-order sorption process and is the angular value of the slope of the intercept in the linear graph of log(q\u003csub\u003ee\u003c/sub\u003e-q\u003csub\u003et\u003c/sub\u003e) and t against time, i.e. - k\u003csub\u003e1\u003c/sub\u003e/2.303.\u003c/p\u003e\n \u003cp\u003eThe kinetics of Cu\u003csup\u003e2+\u003c/sup\u003e ion sorption on PAN-based polyampholyte was evaluated by finding the pseudo first-order kinetic parameters from the log(q\u003csub\u003ee\u003c/sub\u003e-q\u003csub\u003et\u003c/sub\u003e)-t dependence (Fig.\u0026nbsp;\u003cspan class=\"InternalRef\"\u003e1\u003c/span\u003e).\u003c/p\u003e\n \u003cp\u003eAlso, the kinetics of Cu\u003csup\u003e2+\u003c/sup\u003e ion sorption on PAN-based polyampholyte was evaluated by finding pseudo second-order kinetic parameters.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec5\" class=\"Section2\"\u003e\n \u003ch2\u003eA pseudo-second-order kinetic model\u003c/h2\u003e\n \u003cp\u003eThe pseudo-second-order kinetic model is represented by the following equation:\u003c/p\u003e\n \u003cp\u003e\u003cimg src=\"data:image/png;base64,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\" width=\"150\" height=\"50\"\u003e\u003c/p\u003e\n \u003cp\u003eThe initial sorption rate (t\u0026thinsp;=\u0026thinsp;0) is found as follows\u003c/p\u003e\n \u003cp\u003e\u003cimg src=\"data:image/png;base64,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\" width=\"86\" height=\"30\"\u003e\u003c/p\u003e\n \u003cp\u003eIn the given equations, k\u003csub\u003e2\u003c/sub\u003e is the rate constant, qe is the amount of metal ions absorbed by a certain mass of sorbent (mg g \u003csup\u003e-1\u003c/sup\u003e), and t-time (minutes).\u003c/p\u003e\n \u003cp\u003eThe kinetics of Cu\u003csup\u003e2+\u003c/sup\u003e ion sorption onto PAN-based polyampholyte was evaluated by finding the pseudo second-order kinetic parameters from the t/q\u003csub\u003ee\u003c/sub\u003e - t dependence graph. Figure \u003cspan class=\"InternalRef\"\u003e2\u003c/span\u003e.\u003c/p\u003e\n \u003cp\u003eThe rate constants (k\u003csub\u003e1\u003c/sub\u003e and k\u003csub\u003e2\u003c/sub\u003e) and correlation coefficients (R\u003csub\u003e2\u003c/sub\u003e) found using the above Fig. \u003cspan class=\"InternalRef\"\u003e2\u003c/span\u003e for the kinetics of Cu\u003csup\u003e2+\u003c/sup\u003e ion sorption onto PAN-based polyampholyte are presented in the table below.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec6\" class=\"Section2\"\u003e\n \u003ch2\u003eActivation energy of sorption\u003c/h2\u003e\n \u003cp\u003eThe change in the value of the adsorption constant in solutions under the influence of temperature was expressed by the Arrhenius equation [\u003cspan class=\"CitationRef\"\u003e15\u003c/span\u003e].\u003c/p\u003e\n \u003cp\u003e\u003cimg src=\"data:image/png;base64,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\" width=\"219\" height=\"36\"\u003e\u003c/p\u003e\n \u003cp\u003ewhere: A\u003csub\u003e0\u003c/sub\u003e is the exponential factor, E\u003csub\u003ea\u003c/sub\u003e is the activation energy, and k\u003csub\u003e2\u003c/sub\u003e (g/mg min) is the pseudo-second-order kinetic constant at different temperatures. A plot of lnk\u003csub\u003e2\u003c/sub\u003e vs 1/T is plotted to find the activation energy Ea.\u003c/p\u003e\n \u003cp\u003eAdsorption of Cu\u003csup\u003e2+\u003c/sup\u003e ions on PAN-based polyampholyte increased with temperature in the range of 293-313K. A plot of lnk\u003csub\u003e2\u003c/sub\u003e and 1/T was plotted to find the activation energy during sorption (Fig. \u003cspan class=\"InternalRef\"\u003e3\u003c/span\u003e).\u003c/p\u003e\n \u003cp\u003eThe sorption activation energy values calculated for the absorption of Cu\u003csup\u003e2+\u003c/sup\u003e ion on PAN-based polyampholyte in the given Fig. \u003cspan class=\"InternalRef\"\u003e3\u003c/span\u003e are presented in the following table, from which it can be seen that the kinetics of the sorption process of Cu\u003csup\u003e2+\u003c/sup\u003e ions to PAN-based polyampholyte is closer to the integrity of the data of the second-order model compared to the first-order model. The results of the first-order model parameters showed that the absorption of Cu\u003csup\u003e2+\u003c/sup\u003e ions into the polyampholyte was rapid at the beginning, and then the rate of sorption slowed down, what can be explained by the accumulation of metal ions on the surface of the adsorbent and the balance between the ions. In the graph of the second-order sorption process (Fig. \u003cspan class=\"InternalRef\"\u003e2\u003c/span\u003e), the correlation coefficient is close to the first-order adsorption correlation coefficient (R\u003csub\u003e2\u003c/sub\u003e), and the values of the kinetic parameters in the table indicate that the absorption of Cu\u003csup\u003e2+\u003c/sup\u003e ions into polyampholyte obtained on the basis of PAN obeys to the second-order adsorption kinetics. This means that phosphite groups in ionite have an effect on the sorption process along with the nature of ions.\u003c/p\u003e\n \u003cp\u003e\u003cstrong\u003eTable\u0026nbsp;\u003c/strong\u003e\u003cstrong\u003eKinetic parameters and activation energy of Cu\u003c/strong\u003e\u003csup\u003e\u003cstrong\u003e2+\u003c/strong\u003e\u0026nbsp;\u003c/sup\u003e \u003cstrong\u003eion sorption on PAN-based polyampholyte.\u003c/strong\u003e\u003c/p\u003e\n \u003cdiv class=\"gridtable\"\u003e\n \u003ctable id=\"Taba\" border=\"1\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd colspan=\"5\" align=\"left\"\u003e\n \u003cp\u003ePseudo second order\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd colspan=\"4\" align=\"left\"\u003e\n \u003cp\u003ePseudo first order\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd rowspan=\"2\" align=\"left\"\u003e\n \u003cp\u003eE\u003csub\u003ea\u003c/sub\u003e\u003c/p\u003e\n \u003cp\u003ekJ/mol\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003eC\u003csub\u003e0\u003c/sub\u003e mg/l\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003eq\u003csub\u003eex\u003c/sub\u003e mg/l\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003eq\u003csub\u003ecal\u003c/sub\u003e mg/l\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003eR\u003csup\u003e2\u003c/sup\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003ek\u003csub\u003e2\u003c/sub\u003e\u003c/p\u003e\n \u003cp\u003eg/mg min.\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003eh\u003c/p\u003e\n \u003cp\u003eg/mg min.\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003eq\u003csub\u003ecal\u003c/sub\u003e mg/g\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003eR\u003csup\u003e2\u003c/sup\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003ek\u003csub\u003e1\u003c/sub\u003e\u003c/p\u003e\n \u003cp\u003emin\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e8\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e153,1\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e769,2\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,872\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0.000015\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e3,49\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e527,8\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,888\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e-0,090047\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd rowspan=\"4\" align=\"left\"\u003e\n \u003cp\u003e22,942\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e16\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e164,7\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e384,6\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,882\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,000036\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e5,38\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e491,7\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,939\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e-0,0930412\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e32\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e177,9\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e344,8\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,963\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,000057\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e6,79\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e507,4\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,931\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e-0,0928109\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e48\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e187,8\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e312,5\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,991\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,000085\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e8,25\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e501,3\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e0,910\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd align=\"left\"\u003e\n \u003cp\u003e-0,0907382\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003c/tbody\u003e\n \u003c/table\u003e\n \u003c/div\u003e\n\u003c/div\u003e"},{"header":"Conclusion","content":"\u003cp\u003eIn this kinetic study the sorption of copper (II) ions from artificial solutions to new polyampholyte containing nitrogen and phosphorus based on PAN was studied at different initial concentrations and temperatures. It was shown that the sorption of Cu\u003csup\u003e2+\u003c/sup\u003e ions to polyampholyte obtained on the basis of PAN have influenced metal ions as well as nitrogen and phosphorus groups in the sorbent. The activation energy of metal ions during sorption is 22,943 kDj/mol. The sorption ions of Cu\u003csup\u003e2+\u003c/sup\u003e is based on the electrostatic interaction between them and \u0026ndash;PO\u003csub\u003e3\u003c/sub\u003eH\u003csub\u003e2\u003c/sub\u003e- groups on the ionite surface. From solutions containing metal ions, the hydrated of Cu\u003csup\u003e2+\u003c/sup\u003e ions sorption is higher.\u003c/p\u003e "},{"header":"Declarations","content":"\u003cp\u003e\u003cstrong\u003eEthical approval. \u003c/strong\u003eNot applicable.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompeting interests.\u0026nbsp;\u003c/strong\u003eNo, I declare that the authors have no competing interests as defined by Springer, or other interests that might be perceived to influence the results and/or discussion reported in this paper.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eAuthors` contributions.\u0026nbsp;\u003c/strong\u003eThe main experiments were carried out by the authors B. Orzikulov and Khudoyberdiyev. Authors Gafurova and Shakhidova prepared the main text of the article.The author Makhkamov performed the calculations of the obtained results.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eFunding.\u0026nbsp;\u003c/strong\u003eThe authors did not receive support from any organization for the submitted work.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvaibility of data and materials.\u0026nbsp;\u003c/strong\u003eAll data generated or analysed during this study are included in this published article.\u003c/p\u003e"},{"header":"References","content":"\u003col\u003e\n\u003cli\u003eIvanov V. A., Gorshkov V. I. 70 years of the history of the production of ion-exchange resins. // Sorption and chromatographic processes. - 2006. - V.6. - Issue 1. - S. 5-31.\u003c/li\u003e\n\u003cli\u003eA. E. Tarasova, A. A. Grishchuk, S. V. Karpov, Yu. V. Podval\u0026rsquo;naya, A. V. Chernyak, N. O. Garifulin, E. R. Badamshina. 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Adsorption of Benzene Vapor in Polyacrylonitrile (PAN)/(VMT) Vermiculite Composite Materials // AIP Conference Proceedings, 2022, 2432, 050047.\u003c/li\u003e\n\u003cli\u003eNishat Nahid, Ahmad Sharif, Ahamad Tansir. // Synthesis, characterization and antimicrobial studies of newly developed metal-chelated epoxy resins //. Appl. Polym. Sci. - 2006. - Vol. 101. № 3. - P. 1347-1355.\u003c/li\u003e\n\u003cli\u003eSmanova, Z.A., Gafurova, D.A., Savchkov, A.V. //Disodium 1-(2-pyridylazo)-2-oxynaphthalene-3,6-disulfonate: An immobilized reagent for iron (III) determination// Russian Journal of General Chemistrythis link is disabled, 2011, 81(4), P. 739\u0026ndash;742.\u003c/li\u003e\n\u003cli\u003eBobomurodova, M.S., Ashirov, M.A., Gafurova, D.A., Khalilova, L.M., Zhumaeva, E.Sh. Polymer sorbents from \u0026ldquo;nitron fiber waste\u0026rdquo; // NeuroQuantology, 2021, 19(7), pp. 64\u0026ndash;71.\u003c/li\u003e\n\u003cli\u003eRustamov, M.K., Gafurova, D.A., Karimov, M.M., Bekchonov, D.Z., Mukhamediev, M.G. // Application of ion-exchange materials with high specific surface area for solving environmental problems// Russian Journal of General Chemistry, 2014, 84(13), pp. 2545\u0026ndash;2551\u003c/li\u003e\n\u003cli\u003eJurayev M., Khushvaktov S., Botirov S., Bekchanov D., Mukhamediev M. Kinetics of Sorption of Ca (II) And Mg (II) Ions from Solutions to a New Sulphocathionite. International Journal of Advanced Science and Technology Vol. 29, No. 7, (2020), pp. 3395-3401\u003c/li\u003e\n\u003c/ol\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":true,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":false,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"polyacrylonitrile, polyampholite, sorption, ionite, rate constant, kinetics, pseudo first and second kinetic models, copper (II) ion","lastPublishedDoi":"10.21203/rs.3.rs-3170763/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-3170763/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eKinetic models were used to analyze the mechanism of absorption of Cu\u003csup\u003e2+\u003c/sup\u003e ions from artificial solutions by newly obtained polyampholyte containing nitrogen and phosphorus based on polyacrylonitrile. It was determined that the obtained kinetic parameters obey the pseudo-second-order model of the process, and that the sorption of Cu\u003csup\u003e2+\u003c/sup\u003e ions to polyampholyte based on polyacrylonitrile carried at in more degree than other ions.\u003c/p\u003e","manuscriptTitle":"Kinetic Models of Sorption of Copper (Ii) Ions on Ionite Based on Polyacrylonitrile","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2023-08-01 22:55:06","doi":"10.21203/rs.3.rs-3170763/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"970c7684-cff1-467f-92f0-6ab2814a139a","owner":[],"postedDate":"August 1st, 2023","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2023-08-01T22:55:08+00:00","versionOfRecord":[],"versionCreatedAt":"2023-08-01 22:55:06","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-3170763","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3170763","identity":"rs-3170763","version":["v1"]},"buildId":"_2-kVJe1T_tPrBINL-cwx","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}