Arsenic Removal and Recovery from Copper Smelting Wastewater Using TiO2

An effective combined process of aeration micro-electrolysis and flocculation was utilized to treat arsenic that incoming contaminate level was 153 mgL-1 from the metallurgical effluent. Treatment mechanisms and operation conditions were discussed which influenced the removal efficiency of arsenic. Under the optimal technological conditions, it was found that the removal efficiencies of COD and As were 92.5% and 99.7% respectively. The remain arsenic concentration in the treated wastewater was only 0.43mgL-1 and met National Wastewater Discharge Standard(GB8978-1996) in China. Analysis by SEM and EDS revealed that using combined process, most of As(III) could be oxidized to As(V), which led to the high efficiency of arsenic removal. In the meantime, most of other heavy metals, such as Cu, Pb and Ni, had been removed. Therefore, the combined process is regarded as a promising technology in the treatment of arsenic from copper smelting effluent. It has bright future in application.

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Detoxification of Arsenic-Containing Copper Smelting Dust by Electrochemical Advanced Oxidation Technology

Minerals ◽

10.3390/min11121311 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1311

Author(s):

Meng Li ◽

Junfan Yuan ◽

Bingbing Liu ◽

Hao Du ◽

David Dreisinger ◽

...

Keyword(s):

Solid Waste ◽

Arsenic Removal ◽

Removal Rate ◽

Advanced Oxidation ◽

Copper Smelting ◽

Lead And Zinc ◽

Heavy Nonferrous Metals ◽

Advanced Oxidation Technology ◽

Oxidation Technology ◽

Smelting Dust

A large amount of arsenic-containing solid waste is produced in the metallurgical process of heavy nonferrous metals (copper, lead, and zinc). The landfill disposal of these arsenic-containing solid waste will cause serious environmental problems and endanger people’s health. An electrochemical advanced oxidation experiment was carried out with the cathode modified by adding carbon black and polytetrafluoroethylene (PTFE) emulsion. The removal rate of arsenic using advanced electrochemical oxidation with the modified cathode in 75 g/L NaOH at 25 °C for 90 min reached 98.4%, which was significantly higher than 80.69% of the alkaline leaching arsenic removal process. The use of electrochemical advanced oxidation technology can efficiently deal with the problem of arsenic-containing toxic solid waste, considered as a cleaner and efficient method.

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Arsenic removal from acid extraction solutions of copper smelting flue dust

Journal of Cleaner Production ◽

10.1016/j.jclepro.2020.125384 ◽

2021 ◽

Vol 283 ◽

pp. 125384

Author(s):

Guangya Zheng ◽

Jupei Xia ◽

Hailang Liu ◽

Zhengjie Chen

Keyword(s):

Arsenic Removal ◽

Copper Smelting ◽

Acid Extraction ◽

Flue Dust

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Efficient removal of arsenic from copper smelting wastewater in form of scorodite using copper slag

Journal of Cleaner Production ◽

10.1016/j.jclepro.2020.122428 ◽

2020 ◽

Vol 270 ◽

pp. 122428 ◽

Cited By ~ 5

Author(s):

Yongkui Li ◽

Xing Zhu ◽

Xianjin Qi ◽

Bo Shu ◽

Xin Zhang ◽

...

Keyword(s):

Copper Slag ◽

Copper Smelting ◽

Efficient Removal ◽

Removal Of Arsenic ◽

Smelting Wastewater

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Removal and immobilization of arsenic from copper smelting wastewater using copper slag by in situ encapsulation with silica gel

Chemical Engineering Journal ◽

10.1016/j.cej.2020.124833 ◽

2020 ◽

Vol 394 ◽

pp. 124833 ◽

Cited By ~ 5

Author(s):

Yongkui Li ◽

Xing Zhu ◽

Xianjin Qi ◽

Bo Shu ◽

Xin Zhang ◽

...

Keyword(s):

Silica Gel ◽

Copper Slag ◽

Copper Smelting ◽

Smelting Wastewater

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Cu-Doped Fe@Fe2O3 core–shell nanoparticle shifted oxygen reduction pathway for high-efficiency arsenic removal in smelting wastewater

Environmental Science Nano ◽

10.1039/c8en00348c ◽

2018 ◽

Vol 5 (7) ◽

pp. 1595-1607 ◽

Cited By ~ 16

Author(s):

Haopeng Feng ◽

Lin Tang ◽

Jing Tang ◽

Guangming Zeng ◽

Haoran Dong ◽

...

Keyword(s):

Oxygen Reduction ◽

Large Scale ◽

High Efficiency ◽

Arsenic Removal ◽

Core Shell ◽

Practical Applications ◽

Removal Capacity ◽

Smelting Wastewater

Studies on the removal of As(iii) by Fe-based materials have been carried out for decades, but the time-consuming process and low removal capacity are obstacles for large-scale practical applications.

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Simulation Study and Industrial Application of Enhanced Arsenic Removal by Regulating the Proportion of Concentrates in the SKS Copper Smelting Process

Processes ◽

10.3390/pr8040385 ◽

2020 ◽

Vol 8 (4) ◽

pp. 385

Author(s):

Qinmeng Wang ◽

Qiongqiong Wang ◽

Qinghua Tian ◽

Xueyi Guo

Keyword(s):

Arsenic Removal ◽

Copper Smelter ◽

Major Elements ◽

Copper Smelting ◽

Smelting Process ◽

Process Gas ◽

Actual Production ◽

Sulfur Potential ◽

Sulfide Concentrates ◽

Direct Guidance

Arsenic removal is a crucial issue in all copper smelters. Based on the Fangyuan 1# smelter, the effects of major elements (Cu, Fe and S) in sulfide concentrates on arsenic removal in the SKS copper smelting process were studied in this paper. The results show that Cu, Fe and S in concentrates have a significant influence on the oxygen/sulfur potential of smelting systems, and also affect the efficiency of arsenic removal. By regulating the proportion of the major elements in sulfide concentrates, the concentrate composition was changed from its original proportions (Cu 24.4%, Fe 26.8%, S 28.7%, and other 20%) to optimized proportions (Cu 19%, Fe 32%, S 29%, and other 20%). The distribution of arsenic among three phases in the original production process (gas 82.01%, slag 12.08%, matte 5.91%) was improved to obtain an optimal result (gas 94.37%, slag 3.45%, matte 2.18%). More arsenic was removed into the gas phase, and the mass fraction of arsenic in matte was reduced from 0.07% to 0.02%. The findings were applied to actual production processes in several other copper smelters, such as the Hengbang copper smelter, Yuguang smelter and Fangyuan 2# smelter. Therefore, the optimized result obtained in this work could provide direct guidance for actual production.

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