Precipitation of valuable metals from bioleaching solution by biogenic sulfides

被引：59

作者：

Cao, Junya ^{[1
]}

Zhang, Guangji ^{[1
,2
]}

Mao, Zaisha ^{[1
]}

Fang, Zhaoheng ^{[1
]}

Yang, Chao ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China

来源：

MINERALS ENGINEERING | 2009年 / 22卷 / 03期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Sulfate-reducing bacteria; Bioleaching solutions; Precipitation; Biogenic sulfides; SULFATE-REDUCING BACTERIA; ACID-MINE DRAINAGE; HEAVY-METAL; BIOREMEDIATION; INHIBITION; REDUCERS; COPPER; WATER; COMPETITION; BIOREACTOR;

D O I：

10.1016/j.mineng.2008.08.006

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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

引用

页码：289 / 295

页数：7

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