试验规模的电化学先进氧化 (EAOP) 系统用于处理含有Ni-EDTA的废水
Lei Wu1, Shikha Garg2, Ying Dai3
1UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu Province 214206, PR China; UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
Journal of hazardous materials
|June 12, 2024
概括
电化学高级氧化工艺 (EAOP) 在试点规模上有效地去除了-EDTA复合物. 需要进一步的研究来提高阳极的耐用性,并降低大规模废水处理的成本.
科学领域:
- 环境化学环境化学
- 电化学 电化学 电化学
- 废水处理 废水处理
背景情况:
- 电化学高级氧化工艺 (EAOP) 显示出对处理复杂重金属如金属-EDTA的前景.
- 之前的研究主要集中在实验室级反应器上,对金属-EDTA复合物减排的大规模有效性的数据有限.
研究的目的:
- 评估试点规模的连续流EAOP系统的性能,用于降解Ni-EDTA复合物和去除Ni.
- 调查操作参数对Ni-EDTA降解和Ni去除效率的影响.
主要方法:
- 使用了一种72升试验规模的连续流系统,具有蛇形通道和流通电极.
- 研究的主要参数包括流量,电流密度和初始Ni-EDTA度.
- 基于机械的动力模型被应用来描述实验结果.
主要成果:
- 在最佳条件下 (36 L/h流速,5 mA/cm2电流密度,1 mM Ni-EDTA),达到74%的Ni去除,78%的EDTA去除和40%的TOC去除.
- 能源消耗量为13.6千瓦时/立方米,Ni去除的能量效率为7.9g/千瓦时.
- 长期运行显示了阳极腐蚀 (PbO2) 和表面污垢,导致降低了降解效率.
结论:
- 大规模的阳极氧化对降解有机配体有效,并使废水中含有金属有机复合物的金属能够被去除.
- 阳极材料的耐用性,成本降低和能源消耗需要进一步优化,以适用于工业应用.
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