吴鹍;申子瑞;陈志文;李超鲲;王文东;

• 1:西安建筑科技大学环境与市政工程学院
• 2:西安交通大学人居环境与建筑工程学院
• 3:黄土高原生态环境与美丽宜居村镇建设技术研究中心

摘要(Abstract)：

为研究碱热联合活化过硫酸钠(PS)催化氧化降解酚类污染物的去除效果和影响因素，以苯酚为目标污染物，考察PS投加量、NaOH浓度以及反应温度对苯酚降解效果的作用规律。通过使用甲醇、叔丁醇和三氯甲烷作为自由基淬灭剂的淬灭试验来确定碱热联合活化体系中的主导自由基。结果表明，碱热联合活化PS对苯酚废水的降解效果优于单一碱活化或热活化。反应80 min后，碱热联合活化PS对苯酚的去除率可达98.59%,与单一碱活化和热活化相比分别提高了82.15%和47.23%;苯酚的降解速率随PS浓度(10～50 mmol/L)、NaOH浓度(0.1～1.5 mol/L)和反应温度(25～60℃)升高而增加；通过淬灭试验可确定碱热联合活化体系中同时存在硫酸根自由基(·SO^-_4)、羟基自由基(·OH)和超氧自由基(·O-_4)、羟基自由基(·OH)和超氧自由基(·O^-_2)。碱的加入改变了过硫酸钠降解苯酚的反应途径。碱热联合活化体系中·O-_2)。碱的加入改变了过硫酸钠降解苯酚的反应途径。碱热联合活化体系中·O^-_2和酚盐还原PS共同加快了苯酚的降解过程。

关键词(KeyWords)： 环境工程学;碱热联合活化;苯酚;过硫酸钠;自由基

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51578440)

作者(Authors): 吴鹍;申子瑞;陈志文;李超鲲;王文东;

DOI: 10.13637/j.issn.1009-6094.2021.0335

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