电化学生产高价值铁氧物种用于含有的高化物废水预处理
Shuchang Wang1, Chengjin Wang2, Chunhua Feng3
1Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Institute of Eco-Chongming, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China.
Water research
|July 14, 2024
概括
在电化学高级氧化工艺 (EAOP) 中添加铁 (Fe (II) /Fe (III)) 有效地处理废水. 这种方法减少了有害的化副产品,并提高了生物降解性,即使化物含量很高.
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:
- 电化学高级氧化工艺 (EAOPs) 对于降解工业废水中的化合物是有效的.
- 废水中的高化物度可能导致EAOP期间形成不良的化副产品,限制其应用.
- 制定减轻化副产品形成的策略对于推进EAOP至关重要.
研究的目的:
- 研究将铁 (Fe ((II) 和Fe ((III)) 纳入EAOP的有效性,使用添加钻石 (BDD) 阳极在近中性条件下处理废水.
- 评估铁添加对污染物降解率和化副产品形成的影响.
- 评估运行模式 (批量与连续流) 对工艺性能的影响.
主要方法:
- 在电化学高级氧化过程中使用添加钻石 (BDD) 阳极.
- 引入Fe (II) 和Fe (III) 离子进入废水矩阵.
- 在近乎中性的pH条件下 (pH6.5) 进行了实验,控制了染物和化物度.
- 分析了高价值铁氧物种和反应性物种的生成.
- 量化的污染物氧化率和化副产品的形成.
- 评估处理废水的生物降解性.
主要成果:
- 铁II和铁III都促进了高价值铁氧物种 (铁IV,铁V) 的形成,抑制了反应性物种.
- 在高化物条件下,添加1000μMFe(II) 显著增加了污染物的氧化率 (超过2.8倍).
- 1000μM Fe ((II) 减少了超过66%的化副产品的形成.
- 改进的工艺提高了处理废水的生物降解性.
- 连续流量操作进一步放大了Fe (II) 添加的好处.
结论:
- 将Fe (II) /Fe (III) 纳入带有BDD阳极的EAOP是处理高酸废水的一个有希望的策略.
- 这种修改后的方法增强了污染物的降解,并减少了有害副产品的形成.
- 处理过的水的提高生物降解性意味着更可持续的废水处理解决方案.
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