Enhanced sorption of triclosan from aqueous solution to Rhizopus oryzae biomass biofunctionalized with lipids.

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Abstract In this research, a lipid-functionalized sorbent from Rhizopus oryzae biomass was produced applying a biofunctionalization technique where the biomass chemistry was modified by metabolic changes induced during the fungal growth by operating variables of bioreactor. Biosorbent was characterized by the point of zero charge, scanning electron microscopy, Fourier transformation infrared spectroscopy and lipid content. The ability of biosorbent to remove triclosan (TCS) from aqueous solution was investigated in batch experiments. The effect of lipid content (Y X/L ) in biosorbent on the TCS sorption was also studied and the reaction conditions (pH, biomass dose and agitation rate) to maximize the TCS sorption was optimized by a central composite design 2 3 . At optimal reaction conditions, the TCS biosorption was characterized by kinetic, equilibrium and thermodynamic studies. Results showed that biosorbent is a slightly acidic to neutral material with affinity to TCS; the higher Y L/X the higher sorption capacity of TCS. The interactions between the high-Y L/X biosorbent and TCS was favored at pH 5.68, 115.9 rpm and 60.50 mg of biosorbent. The pseudo-first order model was useful to model the kinetic data, although the intraparticle diffusion was identified as the major rate-limiting step. The Freundlich isotherm described properly the TCS biosorption. However, the Freundlich isotherm was modified to include the Y L/X effect. The TCS biosorption was spontaneous and endothermic, but it was governed by weak interactions, mainly Van der Waals forces and hydrogen bonds, and to a lesser extent π-π interactions between aromatic rings of TCS.
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Enhanced sorption of triclosan from aqueous solution to Rhizopus oryzae biomass biofunctionalized with lipids. | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Enhanced sorption of triclosan from aqueous solution to Rhizopus oryzae biomass biofunctionalized with lipids. Juan José Benítez-Cortez, Araceli Tomasini, Wylma Dolores Pérez-Pérez, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8715071/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 In this research, a lipid-functionalized sorbent from Rhizopus oryzae biomass was produced applying a biofunctionalization technique where the biomass chemistry was modified by metabolic changes induced during the fungal growth by operating variables of bioreactor. Biosorbent was characterized by the point of zero charge, scanning electron microscopy, Fourier transformation infrared spectroscopy and lipid content. The ability of biosorbent to remove triclosan (TCS) from aqueous solution was investigated in batch experiments. The effect of lipid content (Y X/L ) in biosorbent on the TCS sorption was also studied and the reaction conditions (pH, biomass dose and agitation rate) to maximize the TCS sorption was optimized by a central composite design 2 3 . At optimal reaction conditions, the TCS biosorption was characterized by kinetic, equilibrium and thermodynamic studies. Results showed that biosorbent is a slightly acidic to neutral material with affinity to TCS; the higher Y L/X the higher sorption capacity of TCS. The interactions between the high-Y L/X biosorbent and TCS was favored at pH 5.68, 115.9 rpm and 60.50 mg of biosorbent. The pseudo-first order model was useful to model the kinetic data, although the intraparticle diffusion was identified as the major rate-limiting step. The Freundlich isotherm described properly the TCS biosorption. However, the Freundlich isotherm was modified to include the Y L/X effect. The TCS biosorption was spontaneous and endothermic, but it was governed by weak interactions, mainly Van der Waals forces and hydrogen bonds, and to a lesser extent π-π interactions between aromatic rings of TCS. triclosan Rhizopus oryzae biosorption biofunctionalization lipids Full Text Additional Declarations No competing interests reported. Supplementary Files Suplementarymaterial.docx Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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