{"title":"Successful hexavalent chromium removal introducing a novel system composed of aminated polyacrylonitrile nanofiber coated with polysulfide","authors":"Mohamadreza Salehi , Mohamadreza Shakiba , Saeedeh Mazinani , Majid Abdouss , Mohammadreza Kalaee","doi":"10.1016/j.jwpe.2024.106683","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the adsorption removal of hexavalent chromium (Cr(VI)), a hazardous contaminant commonly found in industrial wastewater, using aminated polyacrylonitrile (APAN) nanofibers coated with polysulfide (PS). <strong>Cr(VI) contamination, often originating from industries like leather tanning, poses serious health and environmental risks.</strong> The APAN/PS nanofibers achieved a <strong>maximum Cr(VI) adsorption capacity of 172.4 mg/g at pH 3, with a removal efficiency of 94.49</strong> <strong>%</strong>, compared to 86.54 % for uncoated APAN. Characterization by FTIR and FESEM confirmed the successful modification of the nanofiber surface, with an average fiber diameter of <strong>328 nm.</strong> Adsorption kinetics followed a <strong>pseudo-second-order model (R</strong><sup><strong>2</strong></sup> <strong>> 0.98), suggesting chemisorption as the primary mechanism</strong>, and the process aligned closely with the Langmuir isotherm model. <strong>Thermodynamic parameters indicated an endothermic and spontaneous process, with favorable ∆G values.</strong> These results demonstrate APAN/PS nanofibers as an effective and sustainable adsorbent for Cr(VI) removal in industrial wastewater treatment.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106683"},"PeriodicalIF":6.3000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714424019159","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
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Abstract
This study investigates the adsorption removal of hexavalent chromium (Cr(VI)), a hazardous contaminant commonly found in industrial wastewater, using aminated polyacrylonitrile (APAN) nanofibers coated with polysulfide (PS). Cr(VI) contamination, often originating from industries like leather tanning, poses serious health and environmental risks. The APAN/PS nanofibers achieved a maximum Cr(VI) adsorption capacity of 172.4 mg/g at pH 3, with a removal efficiency of 94.49%, compared to 86.54 % for uncoated APAN. Characterization by FTIR and FESEM confirmed the successful modification of the nanofiber surface, with an average fiber diameter of 328 nm. Adsorption kinetics followed a pseudo-second-order model (R2> 0.98), suggesting chemisorption as the primary mechanism, and the process aligned closely with the Langmuir isotherm model. Thermodynamic parameters indicated an endothermic and spontaneous process, with favorable ∆G values. These results demonstrate APAN/PS nanofibers as an effective and sustainable adsorbent for Cr(VI) removal in industrial wastewater treatment.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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