Life in heaps: a review of microbial responses to variable acidity in sulfide mineral bioleaching heaps for metal extraction

详细信息    查看全文

• 作者：D.W. Shiers ; ^{Denis.Shiers@csiro.au" class="auth_mail" title="E-mail the corresponding author} ; D.M. Collinson ^{David.Collinson@csiro.au" class="auth_mail" title="E-mail the corresponding author} ; H.R. Watling ^{Helen.Watling@csiro.au" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Acid stress ; Chemolithotrophs ; Acidophiles
• 刊名：Research in Microbiology
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：167
• 期：7
• 页码：576-586
• 全文大小：1100 K

文摘

Industrial heap leaching of low grade mineral sulfide ores is catalysed by the use of acidophilic microorganisms. These microorganisms obtain energy for growth from the oxidation of reduced inorganic or organic compounds, including soluble ferrous ion, reduced inorganic sulfur compounds (RISC) and acid-stable organic compounds. By-products of these oxidative processes, such as soluble ferric ion and sulfuric acid create favourable chemical conditions for leaching. This review is focused on the behaviour of common bioleaching microorganisms, their responses to changing pH in an industrial setting, and how both changes and microbial responses can impact the micro and macro environment.