不同菌种对雌黄的生物浸出机理
Bioleaching mechanism of orpiment with different bacteria strains
查看参考文献15篇
文摘
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分别采用嗜酸氧化亚铁硫杆菌(At.f)、嗜酸氧化硫硫杆菌(At.t)以及中度嗜热西伯利亚硫杆菌(S.s)对雌黄进行浸出. 结果表明: 嗜酸氧化硫硫杆菌浸出雌黄的效果较好, 浸出过程是细菌直接与矿物作用; 中温菌浸出雌黄则主要通过将Fe~(2+)氧化成Fe~(3+), 再由Fe~(3+)氧化溶解矿物, 浸出后期在矿物表面生成覆盖层; 嗜酸氧化亚铁硫杆菌很难在雌黄矿浆中生长; 添加适量表面活性剂Tween-80能有效改善矿物表面润湿性, 促进Fe3+对砷的浸出, 但对细菌生长会造成影响, 抑制细菌直接浸出. |
其他语种文摘
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The orpiment was bioleached with Acidithiobacillus ferrooxidans(At.f), Acidithiobacillus thiooxidans(At.t) and Sulfobacillus sibiricu(S.s) in batch experiments. The results show that the orpiment can be leached with T.t and S.s, but At.f can not grow in the slurry. At.t and S.s show different mechanisms during the bioleaching of orpiment. In the At.t bioleaching, the dissolution of orpiment is mainly caused by the bacteria attached onto the mineral surface. In the S.s bioleaching, the orpiment is dissolved by Fe~(3+) that is generated by the bacterial oxidation of Fe~(2+), and the mineral surface is covered by precipitation during the later stage of the leaching process. The addition of surfactant Tween-80 can enhance the Fe~(3+) leaching by improving the hydrophilicity of minerals, but inhibit the direct bacterial oxidation of orpiment. |
来源
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中国有色金属学报
,2010,20(6):1234-1240 【核心库】
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关键词
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雌黄
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生物浸出
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常温菌
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中温菌
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表面活性剂
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地址
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1.
中国科学院过程工程研究所, 湿法冶金清洁生产技术国家工程实验室;;生化工程国家重点实验室, 北京, 100190
2.
国家安全监管总局信息研究院, 北京, 100029
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语种
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中文 |
ISSN
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1004-0609 |
学科
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冶金工业 |
基金
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国家自然科学基金资助项目
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国家863计划
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国家973计划
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文献收藏号
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CSCD:3920581
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