Enhanced transformation of organic pollutants by mild oxidants in the presence of synthetic or natural redox mediators: A review.
Enhanced transformation of organic pollutants by mild oxidants in the presence of synthetic or natural redox mediators: A review.
复制标题
DOI：
10.1016/j.watres.2020.116667
复制
发表时间：
2020-11
期刊：
影响因子：
12.8
通讯作者：
Yang Song;Jin Jiang;Wen Qin;Juan Li;Yang Zhou;Yuan Gao
中科院分区：
文献类型：
--
作者：
Yang Song;Jin Jiang;Wen Qin;Juan Li;Yang Zhou;Yuan Gao
合成或天然介质（Med）可以增强温和氧化剂对不同类型有机污染物的转化，这方面的研究已在文献中得到了广泛的研究。这种增强效果归因于以下两个步骤：(i)温和的氧化剂与Medox反应形成具有更高反应活性的Medox，然后（ii）这些有机污染物更容易被Medox转化。本文综述了近年来在合成（如2,2′-氮基-双（3-乙基苯并噻唑啉）-6-磺酸盐（ABTS）和1-羟基苯并三唑（HBT））或天然介质（如丁香醛（SA）、乙酰丁香酮（AS）、对香豆酸和邻苯二酚）与漆酶等温和氧化剂、锰氧化剂包括高锰酸盐（Mn（VII）和MnO2）和高铁酸盐（Fe(VI)）的反应以及有机污染物（包括酚类）转化生成medox的最新研究进展。胺、多环芳烃（PAHs）、有机染料、纸浆和全氟烷基酸（PFAAs）。首先，综述了这些温和氧化剂氧化合成介质和天然介质的反应动力学和机理。然后讨论了人工合成的medox（包括ABTS·+、ABTS2+、HBT·）和天然的medox（包括苯氧基自由基和醌类化合物）与不同有机污染物的反应活性和反应途径。最后，对不同类型的温和氧化剂与合成或天然介质组合处理各种有机污染物的工程应用可能性和新前景进行了评估。
Synthetic or natural mediators (Med) can enhance the transformation of different types of organic pollutants by mild oxidants, which has been extensively studied in literature. This enhancing effect is attributed to the following two steps: (i) mild oxidants react with Med forming Medoxwith higher reactivity, and then (ii) these organic pollutants are more readily transformed by Medox. The present work reviews the latest findings on the formation of Medoxfrom the reactions of synthetic (i.e., 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS) and 1-hydroxybenzotriazole (HBT)) or natural mediators (i.e., syringaldehyde (SA), acetosyringone (AS), p-coumaric acid, and catechol) with mild oxidants such as laccase, manganese oxidants including permanganate (Mn(VII)) and MnO2, and ferrate (Fe(VI)), as well as the transformation of organic pollutants including phenols, amines, polycyclic aromatic hydrocarbons (PAHs), organic dyes, pulp, and perfluoroalkyl acids (PFAAs) by Medox. First, reaction kinetics and mechanisms of the oxidation of synthetic or natural mediators by these mild oxidants were summarized. Reactivity and pathways of synthetic Medoxincluding ABTS·+, ABTS2+, HBT·or natural Medoxincluding phenoxy radicals and quinone-type compounds reacting with different organic pollutants were then discussed. Finally, the possibilities of engineering applications and new perspectives were assessed on the combinations of different types of mild oxidants with synthetic or natural mediators for the treatment of various organic pollutants.