Teng Binglu, Zhao Zhenhua, Xia Liling, Wu Jiangxuan, Wang Hailong
Key Laboratory of Comprehensive Treatment and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
Key Laboratory of Comprehensive Treatment and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
Chemosphere. 2024 Dec;369:143844. doi: 10.1016/j.chemosphere.2024.143844. Epub 2024 Dec 2.
Per- and polyfluoroalkyl substances (PFAS) contamination poses a significant threat to human health. Iron-modified biochar is an eco-friendly, cost-effective, and efficient adsorption material. There is a beneficial interaction between iron groups and biochar to remove PFAS from water through adsorption and degradation. The removal mechanism of the iron-modified biochar mainly includes advanced oxidation, iron group reduction, and adsorption. The adsorption mechanism shifted from being dominated by hydrophobic interactions to electrostatic interactions and ion exchange. Different forms of iron-modified biochar showed excellent removal of short-chain PFAS, which is not found in other modified biochar. Few existing studies have systematically investigated the role of various forms of iron-modified biochar in PFAS removal. Accordingly, this review explores the following areas, the synthesis methods of different forms of iron-modified biochar, the removal effect on long and short-chain PFAS, the key factors affecting removal capacity and the mechanisms of their interaction, the mechanism of PFAS removal, and the regeneration capacity of the composites. In this study, the potential of different forms of iron-modified biochar for PFAS remediation was explored in depth. To provide new ideas for subsequent studies of PFAS removal using iron-modified biochar.
全氟和多氟烷基物质（PFAS）污染对人类健康构成重大威胁。铁改性生物炭是一种环保、经济高效的吸附材料。铁基团与生物炭之间存在有益的相互作用，可通过吸附和降解从水中去除PFAS。铁改性生物炭的去除机制主要包括高级氧化、铁基团还原和吸附。吸附机制从以疏水相互作用为主转变为静电相互作用和离子交换。不同形式的铁改性生物炭对短链PFAS表现出优异的去除效果，这在其他改性生物炭中未发现。现有研究很少系统地研究各种形式的铁改性生物炭在PFAS去除中的作用。因此，本综述探讨了以下方面：不同形式的铁改性生物炭的合成方法、对长链和短链PFAS的去除效果、影响去除能力的关键因素及其相互作用机制、PFAS的去除机制以及复合材料的再生能力。在本研究中，深入探讨了不同形式的铁改性生物炭用于PFAS修复的潜力。为后续利用铁改性生物炭去除PFAS的研究提供新思路。
