博文
Removal of Pb(Ⅱ), Zn(Ⅱ), and Cd(Ⅱ) from Hydrometallurgica
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Removal of Pb(Ⅱ), Zn(Ⅱ), and Cd(Ⅱ) from Hydrometallurgical Effluent by Ferrite Formation
Wenjian Ma1，Dongwei Li1,2 *
1.College of Resource and Environmental Science, Chongqing University, Chongqing,400030, P. R. China;
2. The Key Laboratory of the Exploitation of Southwest Resources & the Environmental Hazards Control Engineering, Ministry of Education, Chongqing,400030, P. R. China
Abstract
The hydrometallurgy industry discharge large numbers of heavy metal wastewater annually in China, especially during the production of Germanium extracted from Lead and Zinc oxide ore. The effluent contains Pb(Ⅱ), Zn(Ⅱ) and Cd(Ⅱ),and the concentration is 7.0, 50.0 and 4.12mg/L respectively. In this research, the XRD was introduced to detect the ferrite generated in chemical coprecipitation. The crystal structure of ferrite may play a important role in parceling heavy metal ions according a series of experimental results. The hydrometallurgical effluent quality treated by chemical coprecipitation and ferrite combined process was excellent. The extraction toxicity of ferrite was far below the allowed standard concentration. It was also found that the removal efficiency will attain to optimality when the pH is from 8.86 to 9.24 and the temperature is from40℃ to 60℃.
Key words:Heavy metal wastewater, hydrometallurgical effluent, XRD, ferrite, extraction toxicity.
卷: 14 期: 2 页: 83-87 出版年: JUN 2010
RESEARCH JOURNAL OF CHEMISTRY AND ENVIRONMENThttps://blog.sciencenet.cn/blog-341648-395832.html
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