Generation of sulfate radical through heterogeneous catalysis for organic contaminants removal: Current development, challenges and prospects

IF 3.5 3区医学 Q2 CHEMISTRY, MEDICINAL

ACS Medicinal Chemistry Letters Pub Date : 2016-10-05 DOI:10.1016/j.apcatb.2016.04.003

Wen-Da Oh , Zhili Dong , Teik-Thye Lim

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引用次数: 1697

Abstract

Sulfate radical-based advanced oxidation processes (SR-AOPs) employing heterogeneous catalysts to generate sulfate radical (SO₄⁻) from peroxymonosulfate (PMS) and persulfate (PS) have been extensively employed for organic contaminant removal in water. This article aims to provide a state–of–the–art review on the recent development in heterogeneous catalysts including single metal, mixed metal, and nonmetal carbon catalysts for organic contaminants removal, with particular focus on PMS activation. The hybrid heterogeneous catalyst/PMS systems integrated with other advanced oxidation technologies is also discussed. Several strategies for the identification of principal reactive radicals in SO₄⁻–oxidation systems are evaluated, namely (i) use of chemical probe or spin trapping agent coupled with analytical tools, and (ii) competitive kinetic approach using selective radical scavengers. The main challenges and mitigation strategies pertinent to the SR-AOPs are identified, which include (i) possible formation of oxyanions and disinfection byproducts, and (ii) dealing with sulfate produced and residual PMS. Potential future applications and research direction of SR-AOPs are proposed. These include (i) novel reactor design for heterogeneous catalytic system based on batch or continuous flow (e.g. completely mixed or plug flow) reactor configuration with catalyst recovery, and (ii) catalytic ceramic membrane incorporating SR-AOPs.

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多相催化生成硫酸盐自由基去除有机污染物:发展现状、挑战与展望

基于硫酸盐自由基的高级氧化工艺(SR-AOPs)采用多相催化剂从过氧单硫酸盐(PMS)和过硫酸盐(PS)中生成硫酸盐自由基(SO4−)，已广泛应用于水中有机污染物的去除。本文综述了近年来用于有机污染物去除的非均相催化剂的研究进展，包括单金属、混合金属和非金属碳催化剂，重点介绍了PMS活化的研究进展。本文还讨论了多相催化剂/PMS系统与其他先进氧化技术的结合。评估了几种识别SO4−氧化系统中主要活性自由基的策略，即(i)使用化学探针或自旋捕获剂与分析工具相结合，以及(ii)使用选择性自由基清除剂的竞争动力学方法。确定了与SR-AOPs有关的主要挑战和缓解战略，其中包括(i)可能形成的氧离子和消毒副产物，以及(ii)处理产生的硫酸盐和残留的经前ms。提出了SR-AOPs的应用前景和研究方向。其中包括(i)基于间歇或连续流(例如，完全混合或塞流)反应器配置的催化剂回收多相催化系统的新型反应器设计，以及(ii)含有SR-AOPs的催化陶瓷膜。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Medicinal Chemistry Letters CHEMISTRY, MEDICINAL-

CiteScore

7.30

自引率

2.40%

发文量

328

审稿时长

1 months

期刊介绍： ACS Medicinal Chemistry Letters is interested in receiving manuscripts that discuss various aspects of medicinal chemistry. The journal will publish studies that pertain to a broad range of subject matter, including compound design and optimization, biological evaluation, drug delivery, imaging agents, and pharmacology of both small and large bioactive molecules. Specific areas include but are not limited to: Identification, synthesis, and optimization of lead biologically active molecules and drugs (small molecules and biologics) Biological characterization of new molecular entities in the context of drug discovery Computational, cheminformatics, and structural studies for the identification or SAR analysis of bioactive molecules, ligands and their targets, etc. Novel and improved methodologies, including radiation biochemistry, with broad application to medicinal chemistry Discovery technologies for biologically active molecules from both synthetic and natural (plant and other) sources Pharmacokinetic/pharmacodynamic studies that address mechanisms underlying drug disposition and response Pharmacogenetic and pharmacogenomic studies used to enhance drug design and the translation of medicinal chemistry into the clinic Mechanistic drug metabolism and regulation of metabolic enzyme gene expression Chemistry patents relevant to the medicinal chemistry field.