Degradation of chelating Cu(II)-ethylenediaminetetraacetic acid wastewater and its reaction mechanism by tourmaline/H2O2 system

被引:0
|
作者
Yao, Zhitong [1 ]
Lu, Tian [2 ]
Li, Haiyan [2 ]
Xia, Meisheng [1 ]
Zhang, Lu [1 ]
Ye, Ying [1 ]
Zhang, Weirui [3 ]
机构
[1] College of Science, Zhejiang University, Hangzhou 310027, China
[2] College of Animal Science, Zhejiang University, Hangzhou 310029, China
[3] Yantai Electronics Co. Ltd., Shenzhen 518118, China
来源
Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society | 2009年 / 37卷 / 04期
关键词
Chelation - Oxidation - Particle size - Wastewater treatment - Chemical oxygen demand - Dissolved oxygen - Silicate minerals - Copper compounds - Degradation - Ethylene;
D O I
暂无
中图分类号
学科分类号
摘要
The treatment of wastewater containing Cu(II)-ethylene diamine tetraacetic acid (EDTA) was investigated. The degradation process and mechanism were discussed as well. The results show that tourmaline has higher treatment efficiency compared with elbaite. The decreasing rates of the chemical oxygen demand and the removal rate of Cu2+ ions increase with the increase of tourmaline addition and the decrease of the particle size. The largest removal rate is found at pH=3. Ultraviolet-visible spectra show that the structure of chelating Cu(II)-EDTA decomposes to low-molecular organic material. The tourmaline and degradation products of EDTA chelate in the degradation manifest as a color change of the wastewater. The reaction of tourmaline/H2O2 is similar to the Fenton reaction. Additionally, the generation of dissolved oxygen and control of the pH are both key factors of degradation.
引用
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页码:543 / 547
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