Reduction and deposition of arsenic in copper electrolyte
| Autor: | Ya-jie Zheng, Ying-lin Peng, Tao Cui, Wen-ke Zhou, Yu-tian Ma |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Inorganic chemistry
Metals and Alloys Reduction rate chemistry.chemical_element Electrolyte Geotechnical Engineering and Engineering Geology Condensed Matter Physics Copper Volumetric flow rate chemistry.chemical_compound chemistry Materials Chemistry Arsenic trioxide Deposition (chemistry) Sulfur dioxide Arsenic |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 21:2772-2777 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(11)61122-9 |
| Popis: | The influences of temperature, H 2 SO 4 concentration, CuSO 4 concentration, reaction time and SO 2 flow rate on the reduction of arsenic(V) with SO 2 were studied and the deposition behavior of arsenic (III) under the effect of concentration and co-crystallization was investigated in copper electrolyte. The results indicate that reduction rate of arsenic (V) decreases with increasing temperature and H 2 SO 4 concentration, but increases with increasing SO 2 flow rate and reaction time, and it can reach 92% under appropriate conditions that reaction temperature is 65°C, H 2 SO 4 concentration is 203 g/L, CuSO 4 concentration is 80 g/L, reaction time is 2 h and SO 2 gas flow rate is 200 mL/min. To remove arsenic in the copper electrolyte, arsenic (V) is reduced to trivalence under the appropriate conditions, the copper electrolyte is concentrated till H 2 SO 4 concentration reaches 645 g/L, and then the removal rates of As, Cu, Sb and Bi reach 83.9%, 87.1%, 21.0% and 84.7%. The XRD analysis shows that crystallized product obtained contains As 2 O 3 and CuSO 4 ·5H 2 O. |
| Databáze: | OpenAIRE |
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