光催化去除水中和废水中的全氟烷基物质：机制、动力学和控制因素。
Photocatalytic removal of perfluoroalkyl substances from water and wastewater: Mechanism, kinetics and controlling factors.
机构信息
School of Civil and Environmental Engineering, University of Technology Sydney, 15 Broadway, NSW 2007, Australia; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
School of Civil and Environmental Engineering, University of Technology Sydney, 15 Broadway, NSW 2007, Australia.
出版信息
Chemosphere. 2017 Dec;189:717-729. doi: 10.1016/j.chemosphere.2017.09.110. Epub 2017 Sep 25.
This review focuses on heterogeneous photocatalysis of perfluoroalkyl substances (PFAS) which are of worldwide concern as emerging persistent organic contaminants. Heterogeneous photocatalysis is an effective and advanced technology for PFAS removal from water with relatively high efficacy. During photocatalysis, various short chain perfluorocarboxylic acids (PFCA) are produced as intermediates and the efficacy is related to the photo-generated hole (h) and photo-generated electron (e). PFAS photodegradation in water under UV irradiation is most effective by using InO as the catalyst, followed by GaO and TiO. Significantly, modifying the chemical composition or morphology of the catalyst can improve its efficacy for PFAS removal. InO porous nanoplates were found to have the best performance of 100% PFAS decomposition under UV light with rate constant (k) and half-time (τ) of 0.158 min and 4.4 min, respectively. Catalysts perform well in acidic solution and increasing temperature to a certain extent. The photocatalytic performance is reduced when treating wastewater due to the presence of dissolved organic matter (DOM), with the catalysts following the order: needle-like GaO > InO > TiO. Future studies should focus on the development of novel photocatalysts, and their immobilization and application for PFAS removal in wastewater.
这篇综述主要关注全氟烷基物质（PFAS）的多相光催化，PFAS 作为新兴的持久性有机污染物受到全球关注。多相光催化是一种从水中去除 PFAS 的有效且先进的技术，具有相对较高的效率。在光催化过程中，会产生各种短链全氟羧酸（PFCA）作为中间体，其效率与光生空穴（h）和光生电子（e）有关。在 UV 照射下，使用 InO 作为催化剂时，PFAS 在水中的光降解最为有效，其次是 GaO 和 TiO。值得注意的是，通过改变催化剂的化学成分或形态可以提高其去除 PFAS 的效率。研究发现，InO 多孔纳米板在紫外光下的 PFAS 分解率达到 100%，其速率常数（k）和半衰期（τ）分别为 0.158 min 和 4.4 min。催化剂在酸性溶液和一定程度上提高温度时性能良好。由于存在溶解有机物（DOM），在处理废水时，光催化性能会降低，催化剂的顺序为：针状 GaO＞InO＞TiO。未来的研究应重点开发新型光催化剂，并将其固定化，应用于废水处理中的 PFAS 去除。
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