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| Arsenic Removal from Arsenic-bearing Copper Ore by Sodium Hypochlorite Leaching Assisted with Microwave and Low-pressure Glow Discharge Plasma |
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Received:January 19, 2015
Revised:January 24, 2015
Accepted:January 27, 2015
Published Online:June 23, 2015
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| DOI：doi：10.3969/j.issn.1007-7545.2015.07.003 |
| KeyWord:sodium hypochlorite; arsenic-bearing copper ore; arsenic removal; microwave; low-pressure glow discharge plasmas |
| Author | Institution |
| ZHAO Zhuo-ying |
中南民族大学 环境科学与工程研究所 |
| QI Yue |
中南民族大学 环境科学与工程研究所 |
| DU Dong-yun |
中南民族大学 环境科学与工程研究所 |
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| Abstract: |
| Arsenic content was reduced by leaching arsenic-bearing copper ore with sodium hypochlorite under alkaline oxidizing condition. The results show that arsenic leaching rate is 47.53% under the optimum conditions including temperature of 30 ℃, particle size of 54~74 μm, sodium hypochlorite concentration of 0.39 mol/L, sodium hydroxide dosage of 1.67% of sample ore, leaching time of 90 min, and ratio of liquid to solid of 40︰1(mL/g). Arsenic leaching rates of sodium hypochlorite leaching under microwave and low-pressure glow discharge plasmas are 66% and 72.88% respectively, while arsenic content in treated copper ore is reduced to 0.15% and 0.12% respectively, which meets arsenic index requirement of second grade copper concentrates. |
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