کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
212907 462072 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Arsenic release from gold mine rocks mediated by the activity of indigenous bacteria
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Arsenic release from gold mine rocks mediated by the activity of indigenous bacteria
چکیده انگلیسی

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.

Research highlights
► Arsenite oxidizer promotes direct arsenic mobilization from arsenopyrite
► Dissimilative arsenate reducers were active in arsenic mobilization
► Siderophores produced by Pseudomonas spp. promote dissolution of arsenic minerals

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 104, Issues 3–4, October 2010, Pages 437–442
نویسندگان
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