使用合电-芬顿和电凝过程对四环素的高效处理:机制和毒性评估
1Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China; Shanghai Energy Construction Engineering Design & Research Co., Shanghai, 200135, China.
Chemosphere
|June 20, 2024
概括
一个新的碳纤维刷电极有效地使用合电-芬顿和电凝 (EF-EC) 过程去除四环素 (TC). 这种稳定且可重复使用的阴极在中性条件下提供有效的TC处理.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理技术水处理技术
背景情况:
- 环素 (TC) 是水中常见的抗生素污染物.
- 传统的TC治疗方法经常面临诸如pH依赖和不完全去除等挑战.
- 开发高效和稳定的电极材料对于先进的氧化过程至关重要.
研究的目的:
- 设计和评估一种新的碳纤维刷 (CFB) 电极,用于去除四环素 (TC).
- 通过使用CFB阴极,研究合电-芬顿和电凝 (EF-EC) 过程的效率.
- 评估拟议的处理系统的稳定性,可重复使用性和机制.
主要方法:
- 使用碳纤维丝和导电金属制造一种新的碳纤维刷 (CFB) 电极.
- 用CFB电极作为阴极构建一个合的电-芬顿和电凝 (EF-EC) 系统.
- 优化处理参数,评估TC去除效率和降解.
- 通过多个处理周期评估电极可重复使用性.
- 降解中间体的分析和毒性预测.
主要成果:
- 在20分钟内实现了10毫克L-1TC的最佳97.9%的清除率.
- 结合的EF-EC工艺在中性pH条件下表现出有效性,优于单独的EF或EC工艺.
- CFB阴极表现出优异的可重复使用性和稳定性,在10个周期内,TC去除率始终高于92%以上.
- 机制分析证实了EF (激素生成) 和EC (凝固剂形成) 在TC去除中的协同作用.
- 毒性预测表明,降解中间体的生物毒性低于原始TC分子.
结论:
- 新型CFB电极促进了有效和稳定的EF-EC合过程,以去除四环素.
- EF-EC 工艺提供了一个强大的,不太依赖pH值的替代方法来处理被四环素污染的水.
- 开发的CFB阴极由于其可重复使用性和有效性,在废水处理中具有实践应用的巨大潜力.
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