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Removal of Chloride Ions from Strongly Acidic Wastewater Using Cu(0)/Cu(II): Efficiency Enhancement by UV Irradiation and the Mechanism for Chloride Ions Removal
Peng, Xianjia; Dou, Wenyue; Kong, Linghao; Hu, Xingyun; Wang, Xianliang
2019
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume53Issue:1Pages:383-389
AbstractStrongly acidic wastewater, which is usually generated from nonferrous metal smelting industries, has the ability to be recycled as sulfuric acid. Before this wastewater is recycled, the removal of chloride ions is necessary to improve the quality of the recycled sulfuric acid. At present, the widely used method to remove chloride ions from acidic wastewater in the form of CuCl precipitate has several disadvantages, including low removal efficiency, high temperature, long treatment time, and high dosage of Cu(II). This study proposed an improved new method of removing Cl(-I) using Cu(0)/Cu(II) under UV irradiation, and the mechanism was investigated. The Cl(-I) concentration was lowered to below 50 mg/L at a Cu(II) dosage of 1200 mg/L. Under UV irradiation, ligand-to-metal charge transfer takes place, thereby resulting in the formation of Cl-center dot. Next, CuCI precipitates form through the reaction between Cu(0) and Cl-center dot and produce h(+)/(OH)-O-center dot under UV irradiation, which can oxidize Cl(-I) to Cl-center dot. Simultaneously, Cl-2 gas also forms directly from Cl-center dot. This study offered a theoretical foundation for the application of UV irradiation for the enhanced removal of chloride ions from strongly acidic wastewater.
Department中国科学院饮用水科学与技术重点实验室
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43516
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Beijing Key Lab Ind Wastewater Treatment & Resour, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Ctr Dis Control & Prevent, Natl Inst Environm Hlth, Beijing 100021, Peoples R China
Recommended Citation
GB/T 7714
Peng, Xianjia,Dou, Wenyue,Kong, Linghao,et al. Removal of Chloride Ions from Strongly Acidic Wastewater Using Cu(0)/Cu(II): Efficiency Enhancement by UV Irradiation and the Mechanism for Chloride Ions Removal[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(1):383-389.
APA Peng, Xianjia,Dou, Wenyue,Kong, Linghao,Hu, Xingyun,&Wang, Xianliang.(2019).Removal of Chloride Ions from Strongly Acidic Wastewater Using Cu(0)/Cu(II): Efficiency Enhancement by UV Irradiation and the Mechanism for Chloride Ions Removal.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(1),383-389.
MLA Peng, Xianjia,et al."Removal of Chloride Ions from Strongly Acidic Wastewater Using Cu(0)/Cu(II): Efficiency Enhancement by UV Irradiation and the Mechanism for Chloride Ions Removal".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.1(2019):383-389.
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