Synthesis and characterization of PCC from marble waste for its application in papermaking

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This study synthesized ultrafine and submicron calcium carbonate particles from marble waste using various methods and surfactants, finding that surface-modified and unmodified PCC improved paper properties more than commercial PCC.

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This paper studies synthesis of precipitated calcium carbonate (PCC) from marble waste, using CaCl2 solutions and Ca(OH)2 slurry carbonated with CO2 in two reactor setups (a semi-batch foam-bed reactor and a semi-batch stirrer reactor), with CTAB/SDS and other surfactants as surface modifiers and, in some cases, ultrasonication or simultaneous surfactant application. Using SEM, TEM, XRD, FTIR, and drop shape analysis, the authors report that with SDS in the foam-bed reactor they produced distinct smaller hydrophobic vaterite particles (426 nm, water contact angle 103.3°) from CaCl2 solution, while in the stirrer reactor methanol enabled needle-like aragonite nanoparticles (215.6 nm, L/D 8.55) without ultrasonication or surfactant. They further evaluated handmade paper sheets made with modified or unmodified PCC derived from marble waste and found improved filler retention and optical/mechanical properties versus commercial PCC, though direct MARWAS powder use slightly reduced mechanical strength, and the work is presented as a preprint/peer-reviewed publication context. The paper does not explicitly discuss endometriosis or adenomyosis; it was included in the corpus via a keyword match in the upstream search index.

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Abstract

Abstract CaCl2 solution and Ca(OH)2 slurry, both prepared from marble waste (MARWAS), were carbonated with CO2 gas in the presence of CTAB, SDS, Teepol-610s, Triton-X, and Tween-80 as the surface modifiers in a semi-batch foam-bed reactor (FBR) to synthesize ultrafine or submicron PCC particles with enhanced hydrophobicity. Nano/ultrafine PPC particles with and without surfactant were also synthesized in a semi-batch stirrer reactor (SR) using CaCl2 solutions made from MARWAS and NH4HCO3 as the carbonating agent by single or simultaneous application of ultrasonication (US) and surfactant, respectively. The products were characterized by SEM, TEM, XRD, FTIR, and drop shape analyzer. In the presence of SDS in the FBR, distinct and smaller hydrophobic (water contact angle of 103.3o) vaterite particles (426 nm) could be produced using CaCl2 solution than those with the Ca(OH)2 slurry. However, in the SR, methanol was found to be more effective than the aqueous solvent in synthesizing needle-like aragonite nanoparticles (215.6 nm with L/D = 8.55) from CaCl2 solution without any use of US or surfactant. Handmade papers were manufactured using ground MARWAS powder, modified and unmodified PCC. The physical, mechanical, and optical properties of these filler-loaded papers were determined. The use of surface-modified and unmodified PCC was superior to the commercial PCC in increasing filler retention, burst strength, tear strength, brightness, and opacity of the paper hand sheets. Even the direct use of MARWAS powder was found to be more effective than GCC in enhancing the optical properties, although a slight decrease in the mechanical strength was observed.
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Synthesis and characterization of PCC from marble waste for its application in papermaking | 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 Synthesis and characterization of PCC from marble waste for its application in papermaking Vinod Kumar Dhakad, Prashant Shrivastava, Saakshy Agarwal, Susanta Kumar Jana This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3220760/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 29 Mar, 2024 Read the published version in Clean Technologies and Environmental Policy → Version 1 posted 11 You are reading this latest preprint version Abstract CaCl 2 solution and Ca(OH) 2 slurry, both prepared from marble waste (MARWAS), were carbonated with CO 2 gas in the presence of CTAB, SDS, Teepol-610s, Triton-X, and Tween-80 as the surface modifiers in a semi-batch foam-bed reactor (FBR) to synthesize ultrafine or submicron PCC particles with enhanced hydrophobicity. Nano/ultrafine PPC particles with and without surfactant were also synthesized in a semi-batch stirrer reactor (SR) using CaCl 2 solutions made from MARWAS and NH 4 HCO 3 as the carbonating agent by single or simultaneous application of ultrasonication (US) and surfactant, respectively. The products were characterized by SEM, TEM, XRD, FTIR, and drop shape analyzer. In the presence of SDS in the FBR, distinct and smaller hydrophobic (water contact angle of 103.3 o ) vaterite particles (426 nm) could be produced using CaCl 2 solution than those with the Ca(OH) 2 slurry. However, in the SR, methanol was found to be more effective than the aqueous solvent in synthesizing needle-like aragonite nanoparticles (215.6 nm with L/D = 8.55) from CaCl 2 solution without any use of US or surfactant. Handmade papers were manufactured using ground MARWAS powder, modified and unmodified PCC. The physical, mechanical, and optical properties of these filler-loaded papers were determined. The use of surface-modified and unmodified PCC was superior to the commercial PCC in increasing filler retention, burst strength, tear strength, brightness, and opacity of the paper hand sheets. Even the direct use of MARWAS powder was found to be more effective than GCC in enhancing the optical properties, although a slight decrease in the mechanical strength was observed. Marble Waste Precipitated calcium carbonate Foam bed reactor Aragonite Wet carbonation Full Text Additional Declarations No competing interests reported. Supplementary Files GraphicalAbstract.docx Cite Share Download PDF Status: Published Journal Publication published 29 Mar, 2024 Read the published version in Clean Technologies and Environmental Policy → Version 1 posted Editorial decision: Revision requested 02 Feb, 2024 Reviews received at journal 30 Jan, 2024 Reviewers agreed at journal 04 Jan, 2024 Reviewers agreed at journal 02 Nov, 2023 Reviewers agreed at journal 01 Nov, 2023 Reviewers agreed at journal 30 Oct, 2023 Reviewers agreed at journal 29 Oct, 2023 Reviewers invited by journal 29 Oct, 2023 Editor assigned by journal 10 Aug, 2023 Submission checks completed at journal 31 Jul, 2023 First submitted to journal 31 Jul, 2023 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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