亚硫酸盐活化技术及其在废水处理中的应用

doi:10.16085/j.issn.1000-6613.2021-0340

摘要/Abstract

摘要：

亚硫酸盐作为一种脱硫副产物，具有价格低廉、毒性低、制备简便等优点，可被活化产生硫酸根自由基（ $S O 4 · -$ ）、亚硫酸根自由基（ $S O 3 · -$ ）、过氧硫酸根自由基（ $S O 5 · -$ ）和羟基自由基（OH^?）等多种氧化电位高的活性物质，能够快速高效地氧化降解各种有机污染物。因此，亚硫酸盐被视为更经济环保的过硫酸盐替代品。本文综述了亚硫酸盐活化技术的研究进展，包括过渡金属离子活化、紫外光辐射活化和含氧金属酸盐活化等；详细介绍了过渡金属活化亚硫酸盐发生自由基链式反应和紫外辐射亚硫酸盐光解生成自由基等亚硫酸盐活化机理；并归纳总结了亚硫酸盐高级氧化法处理各类有机废水的研究现状。目前，该技术在处理多种难降解废水方面有着显著的效果，但大多数研究仍停留在实验阶段，且处理对象单一，在实际废水处理方面研究尚少。

关键词: 亚硫酸盐, 过渡金属, 活化, 自由基, 氧化, 废水

Abstract:

As a by-product of desulfurization, sulfite has the advantages of low price, low toxicity and simple preparation. It can be activated to produce sulfate radicals (SO $4 · -$ ), sulfite free radicals (SO $3 · -$ ), peroxysulfate radicals (SO $5 · -$ ), hydroxyl radicals (OH^?) and many other active substances with high oxidation potential to oxidize and degrade various organic pollutants quickly and efficiently. Therefore, sulfite is regarded as a more economical and environmentally friendly alternative to persulfate. This article reviews the research progress of sulfite activation technology, including transition metal ion activation, ultraviolet light radiation activation and oxygen-containing metal acid salt activation, etc.. The mechanism of sulfite activation such as the radical chain reaction of transition metal activated sulfite and the formation of free radicals by ultraviolet radiation sulfite photolysis is introduced in detail. The research status of sulfite advanced oxidation process for the treatment of various organic wastewater is summarized. At present, this technology has significant effects in the treatment of a variety of refractory wastewater, but most of the research is still at the experimental stage and the treatment object is single. There is little research on actual wastewater treatment.

Key words: sulfite, transition metal, activation, radical, oxidation, wastewater

中图分类号:

X523

贾艳萍, 薛东奇, 刘启帆, 张海丰, 李正, 张兰河. 亚硫酸盐活化技术及其在废水处理中的应用[J]. 化工进展, 2022, 41(1): 418-426.

JIA Yanping, XUE Dongqi, LIU Qifan, ZHANG Haifeng, LI Zheng, ZHANG Lanhe. Sulfite activation technology and its application in wastewater treatment[J]. Chemical Industry and Engineering Progress, 2022, 41(1): 418-426.

图/表 6

图1 Fe(Ⅲ)催化S(Ⅳ)自氧化的非自由基机制

图2 Fe(Ⅱ)/Fe(Ⅲ)循环转化示意图

图3 Fe0活化亚硫酸盐氧化降解有机污染物反应机理

图4 亚硫酸盐促进Mn(Ⅱ)的去除机理

图5 Fe(Ⅵ)/S(Ⅳ)体系降解甲氧苄啶反应机理

图6 高锰酸盐/亚硫酸盐体系氧化降解阿散酸反应机理

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