降解动力学和消毒副产品在紫外线/硫酸盐过程中形成-4
Chen-Yan Hu1,2, Cun Xiong1, Yi-Li Lin3
1College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai, People's Republic of China.
Environmental technology
|January 2, 2024
概括
紫外线/硫酸盐氧化通过伪第一阶动力学有效降解基-4 (BP4),一种有机紫外线过器. 优化硫酸盐剂量和pH值是有效去除BP4的关键,并最大限度地减少对安全饮用水的消毒副产品.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
背景情况:
- 索-4 (BP4) 是一种常见的有机紫外线过器,在水中发现.
- 传统的紫外线处理单独不足以有效降解BP4.
研究的目的:
- 通过UV/硫酸盐氧化,研究BP4的降解动力学和降解途径.
- 确定BP4降解中的主要反应物种和中间体.
- 评估顺序化过程中消毒副产品 (DBPs) 的形成.
主要方法:
- 在不同的条件下 (硫酸盐剂量,pH) 进行了UV/硫酸盐氧化实验.
- 激进清理实验确定了参与BP4分解的关键反应物种.
- 动力建模被用来估计速率常数.
- 使用分析技术识别了降解中间体.
- 顺序化实验评估了DBP的形成.
主要成果:
- 紫外线/超硫酸盐在伪第一阶动力学之后有效降解了BP4.
- 由于增加了硫酸盐和降低了pH值 (5-8),降解得到了增强,在pH值9处有一个显著的例外,这是由于BP4的基组.
- 硫酸盐和基激素被确定为BP4分解的主要贡献者.
- 无机离子和湿酸抑制了BP4的降解,而化物促进了降解.
- 确定了六种降解中间体,并提出了反应途径.
- BP4矿化程度有限 (在50μM硫酸盐下为9.1%).
- DBP形成受到硫酸盐剂量,pH值和水矩阵的影响.
结论:
- 紫外线/硫酸盐是一种有前途的高级氧化工艺,用于去除BP4.
- 了解反应动力学,反应途径和影响因素对于优化水处理至关重要.
- 控制BP4降解条件可以帮助减轻DBP的形成,确保更安全的饮用水.
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