Comparison of selected characteristics of Sulfobacillus species and review of their occurrence in acidic and bioleaching environments
Comparison of selected characteristics of Sulfobacillus species and review of their occurrence in acidic and bioleaching environments
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DOI：
10.1016/j.hydromet.2008.03.001
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发表时间：
2008-07-01
期刊：
影响因子：
4.7
通讯作者：
Shiers, D. W.
中科院分区：
文献类型：
--
作者：
Watling, H. R.;Perrot, F. A.;Shiers, D. W.
对四种所述硫化杆菌属物种的已发表数据的整理未能产生其相对生物沥滤能力的明确说明。因此，这项工作的两个主要目标是生成四个描述的物种的可比数据，并将这些数据纳入其在生物沥滤环境中对金属提取的贡献的评估中，总结如下：硫杆菌是中度嗜热嗜酸菌，生长在含硫和硫化物环境中，具有广泛的地理分布，在与生物沥滤相关的温度和溶液pH值范围内。它们附着在矿物硫化物表面，这可能促进硫化物更快的氧化，并且它们在不同程度上增强矿物硫化物的浸出。一般来说，与它们在浸提反应器中可能经历的浓度相比，它们对可溶性金属的耐受性往往较低。然而，它们在矿堆（低品位硫化矿）和搅拌罐（高品位硫化精矿）中的存在表明，它们具有很强的适应沥滤液中高金属离子浓度的能力。它们形成孢子的能力赋予它们在恶劣环境中生存的能力，并在有利条件恢复时恢复活跃生长。这最后一个特性可能会抵消它们对可溶性贱金属的敏感性。皇冠版权所有（C）2008年出版的爱思唯尔B.V.保留所有权利。
Collation of published data for the four described Sulfobacillus species failed to generate a clear account of their relative bioleaching capabilities. The two main goals of this work were therefore to generate comparable data for the four described species and to incorporate the data into an evaluation of their contribution to metals extraction in bioleaching environments, summarised as follows: The sulfobacilli are moderately thermophilic acidophiles that grow in sulfurous and sulfidic environments with broad geographical distribution, across a range of temperatures and solution pH relevant to bioleaching. They attach to mineral sulfide surfaces, which may promote faster sulfide oxidation and they enhance to different degrees the leaching of mineral sulfides. In general, their tolerances to soluble metals tend to be low in comparison with the concentrations they may experience in leaching reactors. However, their presence in both heaps (low grade sulfide ores) and agitated tanks (high grade sulfide concentrates) demonstrates a strong ability to adapt to high metal ion concentrations in leachates. Their ability to form spores confers the ability to survive hostile environments and resume active growth when favourable conditions are restored. This last characteristic may counter their sensitivity to soluble base metals. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.