Selective removal of transition metals from acidic mine waters by novel consortia of acidophilic sulfidogenic bacteria.
Selective removal of transition metals from acidic mine waters by novel consortia of acidophilic sulfidogenic bacteria.
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通过新颖的嗜酸性磺胺生成细菌联盟从酸性矿水中选择性去除过渡金属。
DOI：
10.1111/j.1751-7915.2011.00285.x
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发表时间：
2012-01
影响因子：
5.7
通讯作者：
Johnson DB
中科院分区：
文献类型：
--
作者：
Nancucheo I;Johnson DB
构建了两个由嗜酸硫酸盐还原菌混合群落组成的连续流实验室规模生物反应器系统，并使用甘油作为电子供体，测试了它们促进合成矿井沃茨中存在的过渡金属（如硫化物）选择性沉淀的能力。第一个系统的目的（从含有多种可溶性金属的酸性矿井水中选择性沉淀铜）是通过将生物反应器的pH保持在2.2-2.5来实现的。向第二个系统中加入酸性（pH 2.5）合成矿井水，该矿井水含有3 mM的锌和亚铁，以及不同浓度（0.5-30 mM）的铝。 通过在pH 4.0下操作生物反应器并用4 mM甘油补充合成矿井水，硫化锌的选择性沉淀是可能的。 在生物反应器中的微生物种群的分析表明，它们随着不同的操作参数而变化，并从生物反应器中分离出新型嗜酸细菌（包括一种硫化物）。嗜酸生硫生物反应器提供了“原理证明”，即使用简单的在线系统（其中维持受控的pH条件）可以分离矿井沃茨中存在的金属。模块化单元是多功能和强大的，并涉及最小的工程复杂性。
Two continuous‐flow bench‐scale bioreactor systems populated by mixed communities of acidophilic sulfate‐reducing bacteria were constructed and tested for their abilities to promote the selective precipitation of transition metals (as sulfides) present in synthetic mine waters, using glycerol as electron donor. The objective with the first system (selective precipitation of copper from acidic mine water containing a variety of soluble metals) was achieved by maintaining a bioreactor pH of ∼2.2–2.5. The second system was fed with acidic (pH 2.5) synthetic mine water containing 3 mM of both zinc and ferrous iron, and varying concentrations (0.5–30 mM) of aluminium. Selective precipitation of zinc sulfide was possible by operating the bioreactor at pH 4.0 and supplementing the synthetic mine water with 4 mM glycerol. Analysis of the microbial populations in the bioreactors showed that they changed with varying operational parameters, and novel acidophilic bacteria (including one sulfidogen) were isolated from the bioreactors. The acidophilic sulfidogenic bioreactors provided ‘proof of principle’ that segregation of metals present in mine waters is possible using simple online systems within which controlled pH conditions are maintained. The modular units are versatile and robust, and involve minimum engineering complexity.
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影响因子：
6.7
作者：
Hard, BC;Friedrich, S;Babel, W
通讯作者：
Babel, W
影响因子：
11.4
作者：
Heinzel, Elke;Janneck, Eberhard;Seifert, Jana
通讯作者：
Seifert, Jana
DOI：
10.1016/0964-8305(95)00065-d
发表时间：
1995-01-01
影响因子：
4.8
作者：
JOHNSON, DB
通讯作者：
JOHNSON, DB
影响因子：
4.4
作者：
Hallberg, KB;Coupland, K;Johnson, DB
通讯作者：
Johnson, DB
影响因子：
4.4
作者：
PRONK, JT;LIEM, K;KUENEN, JG
通讯作者：
KUENEN, JG