选择性氧化含的异环化合物通过热/氧硫酸盐在富含的废水中的选择性氧化
Liangjie Wang1, Zhengyi Sun2, Jinrui Shi3
1The Key Laboratory of Water and Sediment Sciences (Ministry of Education), College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
这项研究表明,过氧硫酸盐 (PMS) 通过热能选择性地从富含的废水中去除有毒的类异环化合物 (NHC). 这种预处理可以提高废水的生物降解性,而不会显著影响水平.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 先进的氧化过程 先进的氧化过程
背景情况:
- 富含醇的废水,就像焦化废水一样,由于醇的高反应性,对污染物去除存在挑战.
- 这种废水中的性异环化合物 (NHC) 通常比更有毒,比更难生物降解,但更难氧化.
- 现有的方法在的存在下难以选择性地准这些反抗性的NHC.
研究的目的:
- 在热条件下使用过氧化硫酸盐 (PMS) 调查富含的废水中NHC的选择性氧化.
- 为了确定NHC去除的最佳条件,同时最大限度地降低降解.
- 评估这种预处理对焦化废水总体生物降解性的影响.
主要方法:
- 使用过氧硫酸盐 (PMS) 与热处理 (60°C) 结合用于废水处理.
- 在4
- 分析了特定的NHCs (素,异素,氨酸,醇) 和的去除率.
- 评估了真正的焦化废水 (RCW) 的生物降解率 (BOD5/COD) 的变化.
主要成果:
- 通过PMS直接氧化在的存在下,通过PMS直接氧化来实现选择性去除NHCs (素,异素,素).
- 确定了最优的pH范围 (4
- 在NHC选择性条件下,没有产生硫酸盐 (SO4•−) 或基 (HO•) 基.
- 处理RCW提高了生物降解性 (BOD5/COD) 从0.21到0.44,只去除了10%的.
- 观察到氨酸 (45%) 和醇 (85%) 的提取率很高.
结论:
- 热/PMS预处理提供了一种有希望的方法,可以从富含的废水中选择性地去除有毒的NHC.
- 这种方法提高了废水的生物降解性,促进了随后的处理过程.
- 该方法避免了硫酸盐和基基的产生,这表明PMS对NHC的直接氧化机制.
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