Self-Regeneration Hybrid Hydrogel for Bisphenol A Adsorption in Water

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A TiO<sub>2</sub>@PEGDA hybrid hydrogel was synthesized, showing good BPA adsorption capacity and photocatalytic self-regeneration, making it a promising material for BPA elimination in water.

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The paper studied a TiO2 immobilized polyethylene glycol diacrylate hybrid hydrogel (TiO2@PEGDA) as a photocatalytic adsorbent to eliminate bisphenol A (BPA) in water, comparing its structure and adsorption performance with pristine PEGDA. TiO2@PEGDA had a spherical/rough morphology with limited crystallinity and many functional groups, was hydrophilic (contact angle 61.96°), and showed slightly higher BPA adsorption capacity (101.4 mg/g) than pristine PEGDA (97.68 mg/g), with adsorption modeled by pseudo-second-order kinetics and Freundlich isotherms; adsorption was stable with respect to pH only below 8.0 and decreased at higher pH. Regeneration was assessed by photocatalysis over four illumination cycles, retaining 85.6% of initial adsorption capacity, and negative ΔG° and ΔH° indicated a spontaneous, exothermic adsorption process; the limitation explicitly stated is that the work is a preprint not yet peer reviewed. This 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 Hybrid hydrogel was synthesized by immobilizing TiO2 in polyethylene glycol diacrylate (TiO2@PEGDA) as an efficient adsorbent with photocatalysis property for bisphenol A (BPA) elimination. TiO2@PEGDA exhibited spherical and rough structure with limited crystallinity and abundant functional groups. The contact angle was 61.96°, indicating that TiO2@PEGDA is hydrophilic. The swelling capacity of TiO2@PEGDA (9.0%) was decreased compared with pristine PEGDA (15.6%). Adsorption results demonstrated that the maximum adsorption capacity of TiO2@PEGDA (101.4 mg/g) for BPA was slightly higher than pristine PEGDA (97.68 mg/g). The adsorption capacity was independent with pH at pH < 8.0, and decreased obviously when the value of pH was higher than 8.0. The adsorption behavior was fitted well with the pseudo-second-order kinetic and the Freundlich isotherm model. Both ΔG0 and ΔH0 were negative, indicating that BPA adsorbed on TiO2@PEGDA was an exothermic and spontaneous process. Regeneration study was performed by photocatalysis, and the adsorption capacity was 85.6% compared with the initial capacity after four cycles of illumination, indicating that TiO2@PEGDA could be recycled without significant loss of adsorption capacity. Consequently, TiO2@PEGDA can serve as an eco-friendly and promising material for efficiently adsorbing BPA with self-clean property.
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Self-Regeneration Hybrid Hydrogel for Bisphenol A Adsorption in Water | 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 Self-Regeneration Hybrid Hydrogel for Bisphenol A Adsorption in Water Mingyue Piao, Hongxue Du, Yuwei Sun, Honghui Teng This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-661488/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 29 Jan, 2022 Read the published version in Environmental Science and Pollution Research → Version 1 posted 5 You are reading this latest preprint version Abstract Hybrid hydrogel was synthesized by immobilizing TiO 2 in polyethylene glycol diacrylate (TiO 2 @PEGDA) as an efficient adsorbent with photocatalysis property for bisphenol A (BPA) elimination. TiO 2 @PEGDA exhibited spherical and rough structure with limited crystallinity and abundant functional groups. The contact angle was 61.96°, indicating that TiO 2 @PEGDA is hydrophilic. The swelling capacity of TiO 2 @PEGDA (9.0%) was decreased compared with pristine PEGDA (15.6%). Adsorption results demonstrated that the maximum adsorption capacity of TiO 2 @PEGDA (101.4 mg/g) for BPA was slightly higher than pristine PEGDA (97.68 mg/g). The adsorption capacity was independent with pH at pH < 8.0, and decreased obviously when the value of pH was higher than 8.0. The adsorption behavior was fitted well with the pseudo-second-order kinetic and the Freundlich isotherm model. Both ΔG 0 and ΔH 0 were negative, indicating that BPA adsorbed on TiO 2 @PEGDA was an exothermic and spontaneous process. Regeneration study was performed by photocatalysis, and the adsorption capacity was 85.6% compared with the initial capacity after four cycles of illumination, indicating that TiO 2 @PEGDA could be recycled without significant loss of adsorption capacity. Consequently, TiO 2 @PEGDA can serve as an eco-friendly and promising material for efficiently adsorbing BPA with self-clean property. Environmental Chemistry Toxicology Adsorption Bisphenol A Hybrid hydrogel TiO2 Photocatalysis Regeneration. Full Text Cite Share Download PDF Status: Published Journal Publication published 29 Jan, 2022 Read the published version in Environmental Science and Pollution Research → Version 1 posted Editorial decision: Major Revision 17 Dec, 2021 Reviews received at journal 09 Nov, 2021 Reviewers invited by journal 30 Aug, 2021 Editor invited by journal 20 Jul, 2021 First submitted to journal 25 Jun, 2021 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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