摘要：

近年来，基于硫酸根自由基（SO₄ ^•-）的高级氧化技术因其高效稳定的优势在水处理领域引发关注，但常见的过硫酸盐活化方式着眼于能量输入和催化剂引入，存在应用成本高、催化剂难回收等问题，制约了该技术的实际应用。研究表明，以简单有机物做活化剂丰富了过硫酸盐的活化途径。为进一步扩展相关研究思路，构建了顺丁烯二酸活化过硫酸盐体系，探究了该体系在降解染料污染物方面的应用潜能。结果表明，污染物的降解性能与顺丁烯二酸初始浓度、过硫酸盐投加量以及溶液初始pH有关。氧化体系产生了以·OH、¹O₂和O₂ ^•-为主，少量SO₄ ^•-为辅的系列活性氧化物种，使得污染物在自由基与非自由基的共同作用下被有效降解。同时，在应用过程中该体系对实际环境因子展现了良好的抗干扰能力。

关键词: 顺丁烯二酸, 过硫酸盐, 染料, 自由基反应, 非自由基反应

Abstract:

In recent years, advanced oxidation technology based on sulfate radicals (SO₄ ^•-) has attracted attention in the field of water treatment due to its outstanding advantages of high efficiency and stability. However, the common activation methods of persulfate mostly focus on energy input and catalyst introduction, which have problems such as high application costs and difficulties in catalyst recovery, as to limit the application of this technology in practical water treatment processes. Studies have shown that using simple organic compounds as activators enriches the activation pathways of persulfate. In order to further extend the research idea, a system for activation of persulfate with simple organic substances maleic acid was constructed, and the potential of this system for degradation of dye pollutants was explored. The degradation performance of the pollutant was related to the initial concentration of maleic acid, the amount of persulfate dosing and the initial pH of the solution. The oxidation system produced a series of reactive oxidants dominated by ·OH, ¹O₂ and O₂ ^·-, supplemented by a small amount of SO₄ ^•-, which degraded the pollutants by the combined action of radical and nonradical reaction pathways. Meanwhile, the system demonstrated good anti-interference ability against actual environmental factors during the application.

Key words: maleic acid, persulfate, dye, radical reaction, nonradical reaction

中图分类号: 

• X703.1