Figshare最新文献

{"title":"Metformin-EmbeddednBiocompatible Chitosan/Poly(vinylnalcohol) Beads with Superior Adsorption Properties toward Lead(II)nand Levofloxacin","authors":"NasimAmiri Ramsheh (14873118), Haniyeh Dogari (14873121), Elias Mosaffa (14873124), Mahdi Akhgari (14873127), Hossein Ghafuri (2545228), Atanu Banerjee (1415545)","doi":"10.1021/acsapm.3c00329.s001","DOIUrl":"https://doi.org/10.1021/acsapm.3c00329.s001","url":null,"abstract":"In this contemporary era, chitosan has gained exceptionalnattentionnas a sustainable biopolymer in the adsorption process due to its nontoxicnnature, biocompatibility, accessibility, and pH-responsive activensurface charge. This study developed a high-performance chitosan/poly­(vinylnalcohol) adsorbent through metformin functionalization. The incorporationnof poly­(vinyl alcohol) (PVA), along with the metformin-activated surface,nremarkably ameliorated its physiochemical properties. The abundancenof inter- and intrahydrogen and chemical bonds in the porous structurenenhances the specific surface area up to 83.8 m<sup>2</sup>/g. Seriesncharacterization methods are utilized to investigate the adsorbents’ncharacteristics in all aspects and the removal performance. Furthermore,nthe key factors for the adsorption process, including the influencenof pH, adsorbent quantity, time intervals, and preliminary concentration,nwere studied and optimized. The optimal pH was observed in the neutralnmoiety, which is crucial from an industrial perspective. Due to thenpresence of countless nitrogen and oxygen atom-containing backbones,nthe CS/PVA-Pr-Met biocomposite has demonstrated considerable adsorptionncapacity toward Pb­(II) ions and levofloxacin with the highest adsorptionncapacities of 313.162 mg/g for Pb­(II) and 2872.927 mg/g for levofloxacinnconcerning their molecular and ionic nature and various adsorptionnmechanisms. In accordance with the correlation coefficient and estimatednparameters, the adsorption of Pb­(II) and levofloxacin onto the beadsnmostly follows the pseudo-second-order kinetics (<i>R</i><sup>2</sup> ≥ 0.997) and the Langmuir adsorption isothermnmodel (<i>R</i><sup>2</sup> ≥ 0.995). The exceptionalnadsorption capacity coupled with the porous structure of the modifiednhydrogel beads has promising applications for efficient wastewaterntreatment","PeriodicalId":522953,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1753-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147906891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}