基于RuO2-IrO2/Ti和Fe0电极的电氧化-电絮凝处理含Tl废水

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Abstract The present study investigated the integrated treatment of Tl-containing wastewater by electrooxidation-electrocoagulation (EO-EC) based on a dimensionally stable RuO₂-IrO₂/Ti electrode and a sacrificial Fe⁰ electrode compared with the single electrocoagulation (EC). Further, the mechanism of Tl removal by EO-EC was discussed. In contrast to the single EC, the EO-EC(1:1) was suitable for the advanced treatment of Tl-containing wastewater in a wide pH (4~10) and current density (5~20mA/cm²) range and was less prone to passivation. Active chlorine and the ORP (oxidation-reduction potential) played a vital role in the indirect oxidation of Tl(I) to Tl(III) by EO-EC. The floc analyses showed that Tl(OH)_3(s) was co-precipitated with Fe(OH)_3(am), and the residual Tl(I) was adsorbed on the lepidocrocite. This study offered an integrated EO-EC method for remediation of Tl-containing wastewater, which can meet the discharge standard of <2µg/L for Tl is economically feasible.

Key words： thallium electrooxidation electrocoagulation industrial wastewater combination technology

Received: 08 November 2021

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X703

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	Articles by authors
	ZHANG Rui-qi
	WU Hong-hui
	XU Hai-yin
	WANG Ping
	ZHU-Jian
	LUO Yuan-ling
	HE Dong
	XU Xin
	WE Jie

Cite this article:

ZHANG Rui-qi,WU Hong-hui,XU Hai-yin等. Electrooxidation-electrocoagulation treatment ofthallium containing wastewater based on RuO₂-IrO₂/Ti and Fe⁰ electrodes[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2656-2661.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I6/2656

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