Arsenic release from gold mine rocks mediated by the activity of indigenous bacteria
Arsenic release from gold mine rocks mediated by the activity of indigenous bacteria
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DOI：
10.1016/j.hydromet.2010.02.025
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发表时间：
2010-10-01
期刊：
影响因子：
4.7
通讯作者：
Sklodowska, A.
中科院分区：
文献类型：
--
作者：
Drewniak, L.;Matlakowska, R.;Sklodowska, A.
兹罗提斯托克的古老金矿是地下和地下水以及土壤严重砷污染的来源。本研究的目的是调查砷代谢细菌对天然矿物中砷迁移的影响，并评估它们在兹罗提斯托克金矿砷生物地球化学循环中的潜在作用。使用简单的培养方法，发现从金矿中分离出的细菌可以直接和间接影响原生和次生矿物中砷的迁移。异化砷酸盐还原剂 Shewanella sp。 O23S 和气单胞菌 O23A 在砷的直接动员中特别活跃。假单胞菌属产生的铁载体。从矿岩生物膜中分离出来的砷在间接砷动员中发挥着重要作用。提出了由亚砷酸盐氧化剂、异化砷酸盐还原剂和抗砷细菌介导的砷酸盐矿物释放砷的潜在机制。 (c) 2010 Elsevier B.V. 保留所有权利。
The ancient gold mine at Zloty Stok is a source of serious arsenic contamination of underground and ground water, and soil. The objectives of this study were to investigate the impact of arsenic-metabolizing bacteria on arsenic mobilization from natural minerals and to estimate their potential role in the arsenic biogeochemical cycle in Zloty Stok gold mine. Using simple cultivation methods it was found that bacteria isolated from this gold mine could directly and indirectly influence arsenic mobilization from primary and secondary minerals. The dissimilatory arsenate reducers Shewanella sp. O23S and Aeromonas sp.O23A were particularly active in direct mobilization of the arsenic. Siderophores produced by Pseudomonas spp. isolated from a mine rock biofilm were shown to play a significant role in indirect arsenic mobilization. A potential mechanism of arsenic release from arsenate minerals, mediated by arsenite oxidizers, dissimilatory arsenate reducers and arsenic-resistant bacteria is proposed. (c) 2010 Elsevier B.V. All rights reserved.