电催化氢化还原去除水体卤代有机物研究进展

Electrocatalytic hydrodechlorination reaction for detoxification of the persistent chlorinated organic pollutants in water

氯代有机物是典型持久性有机污染物,对人类和环境造成了巨大威胁。在已报道的污染修复技术中,电催化脱氯技术因其反应连续高效、设备简单、无二次污染等优点,成为研究的热点。着重综述了当前电催化氢化还原技术在反应机制、电子传递路径、反应决速步骤和效能调控策略等方面的研究进展,同时指出该技术尚存的问题,并对其应用前景作出展望。

Chlorinated organics represent a typical persistent organic pollutant with variable mobility,highly carcinogenic to aquatic environments and human health,and strong resistance to natural degradation.Electrocatalytic hydrodechlorination(EHDC)technology is a pollution control technology that generates active hydrogen radicals(H*)via in-situ electrolysis of water,which enabled to detoxify the chlorinated organic substances by hydrogenolysis of the C—Cl bond.It has aroused intensive research interest in recent years due to its high efficiency,low apparatus cost and little risk of secondary pollution(use of the clean and renewable electricity and no yield of toxic intermediates).This article will review the current research progress of this technology in the aspects of the electron transfer path,rate-determining step and efficiency control strategies,point out the remaining problems and simultaneously propose the application prospect for the EHDC technology.