广东工业大学环境科学与工程学院,广东省工业污染场地修复技术与装备工程技术研究中心,广州 510006
Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
为实现废水中EDTA-Cu的快速破络和去除,以铜基生物炭(CuO@BC)为催化材料活化过硫酸钠(PS),探究了EDTA-Cu、TOC和铜的去除效率及影响因素,初步揭示了催化机理。结果表明,CuO@BC-PS体系能够在60 min时有效去除97.1%的EDTA-Cu和69.6%的TOC,并且通过沉淀去除62.2%的铜。氧化铜(CuO)是提高复合材料催化作用的关键因素,降解反应体系中自由基作用不大,非自由基途径活化PS是降解EDTA-Cu的主要原因。以上研究结果可为络合态重金属污染废水的高级氧化处理提供参考。
To accelerate the decomplexation and removal of EDTA-Cu in wastewater, the copper-based biochar (CuO@BC) was used as a catalytic material to activate sodium persulfate (PS). The removal efficiency of EDTA-Cu, TOC and Cu and their impact factors were studied, and the catalytic mechanism was preliminarily revealed. The results showed that the CuO@BC-PS system could effectively remove 97.1% EDTA-Cu and 69.6% TOC at 60 min, and 62.2% Cu would be removed by precipitation. Copper oxide (CuO) was the key factor to improve the catalysis of composite materials, free radicals had little effect in the degradation reaction system, and the degradation of EDTA-Cu was mainly achieved by the non-radical pathway for PS activation. The research results provide theoretical basis for advanced oxidation treatment of complexed heavy metal contaminated wastewater.
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SEM images of materials
Effects of different PS concentration on EDTA-Cu degradation
不同CuO@BC的投加量对EDTA-Cu降解的影响
Effects of different CuO@BC dosage on EDTA-Cu degradation
Effects of different initial pH on EDTA-Cu degradation
Effects of different reaction temperature on EDTA-Cu degradation
Removal effect of Cu and TOC in wastewater
不同体系的对照以及CuO@BC的重复利用实验
Control experiment of different systems and recycling experiment of CuO@BC
淬灭实验结果、EPR图谱、EIS图谱以及溶液中Cu活化性能探究
Quenching experiment, EPR spectra, EIS spectra and activation property exploration of Cu in solution
CuO@BC-PS催化体系对淋洗废水的处理效能
Treatment of soil washing wastewater by CuO@BC-PS catalytic system
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