利用胺化废物衍生吸附剂加强对短链全氟烷基物质的去除

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-05-01 DOI:10.1016/j.jwpe.2025.107829

Youngwoo Kwak , Min-suk Oh , Changwoo Nam

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引用次数: 0

摘要

全氟和多氟烷基物质（PFAS）是威胁人类健康和生态系统的持久性环境污染物。本研究考察了利用聚氯乙烯（PVC）和纤维素上生长的层状双氢氧化物（LDH）共热解产生的废炭从水溶液中去除全氟辛酸（PFOA）和全氟丁酸（PFBA），分别代表长链和短链PFAS （LDH@cellulose）。LDH@cellulose的掺入提高了炭的热稳定性和比表面积。吸附动力学表明，PFBA对胺化吸附剂具有更快的平衡时间和更高的亲和力，而PFOA对热解吸附剂具有更高的亲和力。这些发现归因于PFAS链长度对其与吸附剂表面性质相互作用的影响。用解吸溶剂对用过的吸附剂进行再生。此外，洗脱液中存在的PFAS在极性非质子溶剂环境中可降解。这些发现强调了表面润湿性在PFAS吸附中的重要性，并强调了去除溶剂中存在的PFAS的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced removal of short-chain perfluoroalkyl substance using aminated waste-derived sorbent

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Enhanced removal of short-chain perfluoroalkyl substance using aminated waste-derived sorbent

Per- and polyfluoroalkyl substances (PFAS) are persistent environmental pollutants threatening human health and ecosystems. This study examines the removal of perfluorooctanoic acid (PFOA) and perfluorobutanoic acid (PFBA), representing long-chain and short-chain PFAS respectively, from aqueous solutions using waste-derived char produced through co-pyrolysis of polyvinyl chloride (PVC) and layered double hydroxide (LDH) grown on cellulose (LDH@cellulose). LDH@cellulose incorporation enhanced the char's thermal stability and specific surface area. Adsorption kinetics revealed that PFBA exhibited faster equilibrium times and higher affinity for aminated sorbent, while PFOA showed a preference for pyrolyzed sorbent. These findings were attributed to the influence of PFAS chain length on their interactions with the surface properties of the sorbents. The used sorbents were regenerated using desorption solvents. Additionally, PFAS present in the eluate were found to be degradable in polar aprotic solvent environments. These findings highlight the importance of surface wettability in PFAS adsorption and emphasize the potential for removing PFAS present in solvents.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

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