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从六价减少中回收能量,用于In Situ电催化过氧化生产

Huaijia Xin^1,2, Wei Zhang³, Xiaofeng Zhang¹

¹Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.

Environmental science & technology

|September 18, 2024

概括

这项研究从有毒的Cr(VI) 污染物中回收化学能量,在工业废水处理过程中在现场产生过氧化 (H2O2). 这种创新方法为污染物排毒和资源回收提供了一种可持续的方法.

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:

工业废水处理需要可持续的方法来排毒污染物和资源回收.
分散处理需要在现场利用来自污染物的化学能量.
六价 (Cr(VI)) 是一种有毒的污染物,需要有效的去除策略.

研究的目的:

为了利用Cr(VI的电还原产生的化学能量,在现场增强过氧化 (H2O2) 的产生.
开发一个堆叠的流通电化学系统,同时进行Cr (VI) 排毒和H2O2生产.
研究Cr(VI) 能源利用促进H2O2生成的机制.

主要方法:

一个堆叠的流通电化学系统被设计用于Cr(VI) 电还原.
水流被用来将氧气演变与2电子氧气减少相结合,用于H2O2合成.
电极电位由Cr(VI) 能量调节,以增强O2演变和抑制H2演变.

主要成果:

该系统实现了10-100 ppm Cr ((VI) 的完全减少,最大H2O2度为2.41 mM.
含有Cr (VI) 的电解质中的H2O2度比没有Cr (VI) 的电解质高10.6-88.1%.
一个持续24天的连续实验证明了高效率 (100%的Cr6减少) 和稳定性,在1.8V时产生约1.5mM的H2O2.

结论:

该研究提出了一个可行的Cr(VI) 排毒和同时在现场生成H2O2的战略.
从污染物中回收化学能量为创新的废水处理和资源利用提供了新的视角.
开发的电化学系统显示出高效率,稳定性和工业应用的潜力.

关键词:

电化学还原电化学还原通过电极流动的电极.六价的六价是一种过氧化是一种过氧化.废水资源利用情况废水资源利用情况

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