选耐火染料降解通过不同的先进氧化过程
Imane Ouagued1,2, Marc Cretin2, Eddy Petit2
1Water-Environment Laboratory, Hassiba Benbouali University, Chlef 02000, Algeria.
Molecules (Basel, Switzerland)
|February 13, 2025
概括
电-芬顿 (EF) 和阳极氧化 (AO) 有效地降解罗达胺B (RhB) 染料. 联合EF/AO工艺证明了优越的矿化和毒性降低,提供可持续的废水处理解决方案.
科学领域:
- 环境化学环境化学
- 电化学 电化学 电化学
- 水处理 处理水的方法
背景情况:
- 罗达胺B (RhB) 是在织废水中发现的一种持久性有机污染物.
- 有效的降解方法对于减轻染料造成的环境污染至关重要.
研究的目的:
- 通过使用电-芬顿 (EF),阳极氧化 (AO) 和联合EF/AO工艺研究罗达胺B (RhB) 的降解.
- 评估操作参数对降解效率和矿物化的影响.
- 评估电化学处理期间RhB的毒性降低和矿化途径.
主要方法:
- 使用碳阴极和Ti4O7或Ti/Pt阳极进行电化学降解.
- 优化电流密度和评估RhB度影响.
- 使用Microtox®生物发光抑制试验进行毒性评估.
- 通过去除总有机碳 (TOC) 来进行矿化分析.
- 使用高分辨率质谱法阐明降解途径.
主要成果:
- RhB 降解的最佳电流密度为 30 mA cm-2,平衡了效率和能源消耗.
- 联合EF/AO工艺在pH3下实现了90%的TOC去除,这表明矿化程度较高.
- 电化学处理显著降低了RhB溶液的毒性,EF/AO显示最大的降低.
- 降解途径涉及连锁氧化反应,导致矿物化成CO2和H2O.
结论:
- EF,AO和EF/AO是有效的电化学方法,用于Rhodamine B降解和矿化.
- 结合EF/AO过程为可持续和环保的废水处理提供了一个有希望的方法.
- 优化的电化学过程可以有效地去除持久性有机污染物并降低其毒性.
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