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用于水中除砷的铁锰纳米复合材料的寿命末期管理策略

End-of-Life Management Strategies for Fe-Mn Nanocomposites Used in Arsenic Removal from Water.

作者信息

Vujić Maja, Nikić Jasmina, Vijatovic Petrovic Mirjana, Pejin Đorđe, Watson Malcolm, Rončević Srđan, Agbaba Jasmina

机构信息

Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovi'ca 3, 21000 Novi Sad, Serbia.

Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia.

出版信息

Polymers (Basel). 2025 May 15;17(10):1353. doi: 10.3390/polym17101353.

DOI:10.3390/polym17101353
PMID:40430649
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12114813/
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.

摘要

本研究调查了用于去除砷（As）的铁锰聚合物纳米复合材料的再生、再利用、稳定性及其环境安全性。本研究中使用的铁锰聚合物纳米复合材料（PS-FMBO）的再生性能通过使用包括NaOH、NaOH-NaCl和NaOH-NaOCl混合物在内的各种洗脱剂进行批量吸附-解吸循环来评估。结果表明，0.1 M NaOH产生了最佳的再生性能，在多个循环中保持了较高的吸附效率。更强的解吸剂导致去除效率显著下降，这可能是由于PS-FMBO纳米复合材料的结构降解，这表明苛刻的解吸条件可能会损害其长期有效性。评估了用水泥和生石灰对PS-FMBO进行稳定化处理以固定As、铁（Fe）和锰（Mn）的效果。浸出试验表明，这些复合材料有效地固定了这些污染物，即使经过长时间老化也观察到极少的浸出，确保符合环境安全法规。此外，对壳聚糖基泡沫的化学稳定性进行了分析，浸出试验证实即使在苛刻条件下，As、Fe和Mn的浓度也很低，进一步加强了该材料的安全性和环境合规性。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生态友好型建筑应用的可持续材料的潜力。它们固定污染物同时保持结构完整性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。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c260/12114813/4213504b8726/polymers-17-01353-g011.jpg
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