{"title":"End-of-Life Management Strategies for Fe-Mn Nanocomposites Used in Arsenic Removal from Water.","authors":"Maja Vujić, Jasmina Nikić, Mirjana Vijatovic Petrovic, Đorđe Pejin, Malcolm Watson, Srđan Rončević, Jasmina Agbaba","doi":"10.3390/polym17101353","DOIUrl":null,"url":null,"abstract":"<p><p>This study investigates the regeneration, reuse, stabilization, and environmental safety of Fe-Mn polymer nanocomposites for arsenic (As) removal and their environmental safety. The regeneration performance of Fe-Mn polymer nanocomposites (PS-FMBO) used in this study was assessed through batch adsorption-desorption cycles using various eluents, including NaOH, NaOH-NaCl, and NaOH-NaOCl mixtures. The results demonstrated that 0.1 M NaOH yielded the best regeneration performance, maintaining higher adsorption efficiency over multiple cycles. Stronger desorption agents caused a significant decline in removal efficiency due to possible structural degradation of the PS-FMBO nanocomposite, suggesting that aggressive desorption conditions could compromise its long-term effectiveness. The stabilization of PS-FMBO with cement and quicklime was evaluated for immobilizing As, iron (Fe), and manganese (Mn). Leaching tests indicated that the composites effectively immobilized these contaminants, with minimal leaching observed even after prolonged aging, ensuring compliance with environmental safety regulations. Furthermore, chitosan-based foams were analyzed for their chemical stability, with leaching tests confirming low concentrations of As, Fe, and Mn, even under aggressive conditions, further reinforcing the material's safety and environmental compliance. These findings underscore the potential of PS-FMBO composites and chitosan-based foams as sustainable materials for hazardous waste management and eco-friendly construction applications. Their ability to immobilize contaminants while maintaining structural integrity highlights their practical significance in reducing environmental pollution and advancing circular economy principles.</p>","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 10","pages":""},"PeriodicalIF":4.7000,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12114813/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymers","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.3390/polym17101353","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
This study investigates the regeneration, reuse, stabilization, and environmental safety of Fe-Mn polymer nanocomposites for arsenic (As) removal and their environmental safety. The regeneration performance of Fe-Mn polymer nanocomposites (PS-FMBO) used in this study was assessed through batch adsorption-desorption cycles using various eluents, including NaOH, NaOH-NaCl, and NaOH-NaOCl mixtures. The results demonstrated that 0.1 M NaOH yielded the best regeneration performance, maintaining higher adsorption efficiency over multiple cycles. Stronger desorption agents caused a significant decline in removal efficiency due to possible structural degradation of the PS-FMBO nanocomposite, suggesting that aggressive desorption conditions could compromise its long-term effectiveness. The stabilization of PS-FMBO with cement and quicklime was evaluated for immobilizing As, iron (Fe), and manganese (Mn). Leaching tests indicated that the composites effectively immobilized these contaminants, with minimal leaching observed even after prolonged aging, ensuring compliance with environmental safety regulations. Furthermore, chitosan-based foams were analyzed for their chemical stability, with leaching tests confirming low concentrations of As, Fe, and Mn, even under aggressive conditions, further reinforcing the material's safety and environmental compliance. These findings underscore the potential of PS-FMBO composites and chitosan-based foams as sustainable materials for hazardous waste management and eco-friendly construction applications. Their ability to immobilize contaminants while maintaining structural integrity highlights their practical significance in reducing environmental pollution and advancing circular economy principles.
研究了Fe-Mn聚合物纳米复合材料的再生、再利用、稳定性和环境安全性及其对砷的去除效果。本研究中使用的Fe-Mn聚合物纳米复合材料（PS-FMBO）通过不同洗脱剂（包括NaOH、NaOH- nacl和NaOH- naocl混合物）的间歇吸附-解吸循环来评估其再生性能。结果表明，0.1 M NaOH的再生性能最好，在多次循环中保持较高的吸附效率。由于PS-FMBO纳米复合材料可能发生结构降解，较强的脱附剂导致其去除效率显著下降，表明较强的脱附条件可能会影响其长期效果。评价了水泥和生石灰对PS-FMBO固定As、铁（Fe）和锰（Mn）的稳定性。浸出试验表明，复合材料有效地固定了这些污染物，即使在长时间老化后，浸出率也最低，确保符合环境安全法规。此外，对壳聚糖泡沫的化学稳定性进行了分析，浸出试验证实，即使在恶劣条件下，壳聚糖泡沫也含有低浓度的砷、铁和锰，进一步增强了材料的安全性和环保性。这些发现强调了PS-FMBO复合材料和壳聚糖基泡沫作为危险废物管理和环保建筑应用的可持续材料的潜力。它们在保持结构完整性的同时固定污染物的能力突出了它们在减少环境污染和推进循环经济原则方面的实际意义。
期刊介绍：
Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.
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