如何去除废水中络合态重金属是矿冶领域环境治理的难题之一。光电催化氧化是一种兼具光、电催化特点，节能高效无二次污染的水处理技术。针对目前光催化过程中存在的太阳能利用率及光量子效率低等问题，本项目拟通过研究获得在可见宽波范围内具有良好响应的新型非金属掺杂锡酸锌系及钼酸铋系薄膜光催化电极，构建电助光催化体系处理络合态重金属废水。通过研究可见光电极对重金属-无机络合物、重金属-有机络合物以及重金属-有机-无机络合物的降解行为，明确多种络合剂共存下电极表面与水中游离络合剂的降解差异及重金属的电沉积规律；通过研究外加电压及水化学条件等因素对降解过程中中间产物和最终产物的分布特性，明确光电作用下降解与回收络合重金属的控制因素，阐明重金属、络合剂以及导电体界面之间的相互作用机理，揭示络合态重金属在光电催化氧化作用下的化学转性及其降解与回收的作用机制，研究结果为开发高效处理络合重金属废水提供理论与技术基础。

Removal of heavy metals complexes from wastewater was one of the problems in the environment field of mining and metallurgy. Photoelectrocatalytic oxidation is a new type of wastewater treatment technology with characteristics of light and electrocatalytic, and energy saving and high efficiency without secondary pollution. A new type of doping non-metallic Zn2SnO4 and Bi2MoO6 membrane visible-light photocatalytic electrode was proposed to solve the problems that the low solar energy utilization and the light quantum efficiency in this study. The degradation behaviors of heavy metal-inorganic complexes, heavy metal-organic complexes and heavy metal-organic-inorganic complexes using visible light electrode was investigated. Meanwhile the degradation difference on electrode surface between a variety of complexing agents coexisting and free complexing agent in wastewater was studied. Furthermore, the interaction between heavy metals and complexing agents was discussed. Based on the study of the distribution characteristic of intermediate and final products, the effects of hydrochemical control conditions on the removal of complex heavy metals were clarified. The relationship between heavy metals, complexing agents and interface and the synergetic mechanism of photoelectrocatalytic oxidation to complex heavy metals was revealed. The research results will provide a theoretical basis and guidance for the development of photoelectrocatalytic oxidation technology for the removal of metal complex.