期刊
MINERALS ENGINEERING
卷 22, 期 3, 页码 289-295出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mineng.2008.08.006
关键词
Sulfate-reducing bacteria; Bioleaching solutions; Precipitation; Biogenic sulfides
资金
- National Natural Science Foundation of China [50404009, 50574081, 20490206]
- 973 Program [2004CB619203]
- National High Technology Research and Development Program of China [2007AA060904]
The aim of this work was to explore the possibility of using sulfate-reducing bacteria for the retrieval of valuable metals from a bioleaching solution. Tests were conducted to determine whether the bacteria produced hydrogen sulfide that could be used to precipitate valuable metals from a bioleaching solution as sulfides. The approach consisted of continuous culture of sulfate-reducing bacteria to produce hydrogen sulfide in the first reactor and the subsequent metal precipitation in the second reactor. Batch and continuous experiments were carried out to determine the optimum process parameters. The advantage of this process was demonstrated including faster precipitation of valuable metals and the possibility of the metal precipitation in the form of sulfides. A new flow sheet for the separation of Ni and Cu by biogenic sulfide precipitation in the presence of magnesium was proposed. (C) 2008 Elsevier Ltd. All rights reserved
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