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Cu2+催化砷黄铁矿生物氧化试验研究
- 作者：
- 李骞|齐伟|张雁|沈煌|罗君|徐斌|杨永斌
- 作者单位：
- 中南大学资源加工与生物工程学院|中南大学资源加工与生物工程学院|中南大学资源加工与生物工程学院|中南大学资源加工与生物工程学院|中南大学资源加工与生物工程学院|中南大学资源加工与生物工程学院|中南大学资源加工与生物工程学院
基金项目：
- 国家自然科学基金项目(51574284)
详细信息：
- 作者简介：
- 李骞（1975—），男，湖南长沙人，教授，博士，研究方向为湿法冶金及矿产资源综合利用；长沙市岳麓区麓山南路932号，中南大学资源加工与生物工程学院，410083；E-mail:csuliqian@126.com
- 通讯作者：
- E-mail：qever86867520@qq.com，13155272375
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Experimental study on catalytic effect of Cu2+ on the bio-oxidation of arsenopyrite
- English Author：
- School of Minerals Processing and Bioengineering,Central South University|School of Minerals Processing and Bioengineering,Central South University|School of Minerals Processing and Bioengineering,Central South University|School of Minerals Processing and Bioengineering,Central South University|School of Minerals Processing and Bioengineering,Central South University|School of Minerals Processing and Bioengineering,Central South University|School of Minerals Processing and Bioengineering,Central South University
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
为解决生物氧化过程中砷黄铁矿表面钝化问题，进行了Cu2+催化砷黄铁矿生物氧化试验研究，分析了生物氧化过程中浸出液铁、砷、pH及电位的变化，并对浸渣进行了XRD和SEM分析。结果表明：适宜的Cu2+质量浓度对砷黄铁矿的生物氧化浸出具有显著的催化作用，可使氧化周期缩短10 d；添加的Cu2+能够进入由雌黄、雄黄形成的钝化层中参与反应，加速钝化物的溶解，使致密的钝化膜产生裂纹，加速砷黄铁矿的氧化。
关键词:
生物氧化；铜离子；砷黄铁矿；催化；钝化
Abstract:
The catalytic effect of Cu2+ on the bio-oxidation of arsenopyrite was studied through experiment to solve the surface passivation of arsenopyrite during its bio-oxidation process.The variation of Fe and As concentration,pH,and Eh in the bioleaching solution was analyzed during the leaching process.And the leaching residue was characterized by XRD and SEM.The experimental results show that Cu2+ can enhance the bioleaching rate especially at suitable concentration,shortening the oxidation cycle by 10 d.The added Cu2+ can enter into the passivation layer formed by orpiment and realgar to participate in the reaction,accelerate the dissolution of the passivated materials,and crack the dense passivation film,thereby facilitating the oxidation of the arsenopyrite.
Keywords:
bio-oxidation;copper ion;arsenopyrite;catalysis;passivation
