范莎莎,金春姬,温淳,赵南南,古柏铭,赵阳国

• 1:中国海洋大学环境科学与工程学院
• 2:中国海洋大学海洋环境与生态教育部重点试验室

摘要(Abstract)：

本文构建以掺硼金刚石(Boron-doped diamond, BDD)为阳极、不锈钢为阴极、硫酸盐为电解质的电化学体系,考察了电流密度、pH值、硫酸盐浓度以及初始四环素浓度等四个因素对电化学氧化降解废水中四环素的影响,运用响应曲面法对运行参数进行优化;通过电子自旋共振检测技术分析电化学反应中产生的自由基,探究了间歇通电模式下电化学体系持续氧化机理。结果表明,四个因素对TOC去除率的影响大小次序为:电流密度>初始四环素浓度>初始pH值>硫酸盐浓度,其中初始pH值和硫酸盐浓度与电流密度和初始四环素浓度的交互作用对TOC去除率的影响较为显著;最佳运行参数为pH值为5,电流密度为100 mA·cm~(-2),硫酸盐浓度为0.25 mol·L~(-1),初始四环素浓度为1 000 mg·L~(-1);间歇通电模式下,BDD电极表面产生的SO■等高活性物质间相互转化提供了体系的可持续氧化能力。该研究结果为电化学氧化技术的实际应用提供了节省能耗的有效途径。

关键词(KeyWords)： 响应曲面法;四环素;电活化硫酸盐;掺硼金刚石(BDD)电极;降解机理

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项(201964004)资助~~

作者(Author): 范莎莎,金春姬,温淳,赵南南,古柏铭,赵阳国

DOI: 10.16441/j.cnki.hdxb.20210014

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