globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12066
Scopus记录号: 2-s2.0-84890189455
论文题名:
Microbially enhanced dissolution of HgS in an acid mine drainage system in the California Coast Range
作者: Jew A.D.; Behrens S.F.; Rytuba J.J.; Kappler A.; Spormann A.M.; Brown G.E.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2014
卷: 12, 期:1
起始页码: 20
结束页码: 33
语种: 英语
Scopus关键词: acid mine drainage ; cinnabar ; dissolution ; gene ; incubation ; iron ; microbial community ; microcosm ; mine ; risk assessment ; solubility ; tailings ; waste ; California ; Idria ; United States ; Bacteria (microorganisms) ; Rhodospirillales ; Thiomonas ; bacterial DNA ; mercury derivative ; mercury sulfide ; ribosome DNA ; RNA 16S ; article ; bacterium ; biota ; biotransformation ; chemistry ; classification ; DNA sequence ; genetics ; metabolism ; microbiology ; molecular genetics ; nucleotide sequence ; United States ; Bacteria ; Biota ; Biotransformation ; California ; DNA, Bacterial ; DNA, Ribosomal ; Environmental Microbiology ; Mercury Compounds ; Molecular Sequence Data ; RNA, Ribosomal, 16S ; Sequence Analysis, DNA
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Mercury sulfides (cinnabar and metacinnabar) are the main ores of Hg and are relatively stable under oxic conditions (Ksp = 10-54 and 10-52, respectively). However, until now their stability in the presence of micro-organisms inhabiting acid mine drainage (AMD) systems was unknown. We tested the effects of the AMD microbial community from the inoperative Hg mine at New Idria, CA, present in sediments of an AMD settling pond adjacent to the main waste pile and in a microbial biofilm on the surface of this pond, on the solubility of crystalline HgS. A 16S rRNA gene clone library revealed that the AMD microbial community was dominated by Fe-oxidizing (orders Ferritrophicales and Gallionellas) and S-oxidizing bacteria (Thiomonas sp.), with smaller amounts (≤6%) being comprised of the orders Xanthomondales and Rhodospirillales. Though the order Ferritrophicales dominate the 16S rRNA clones (>60%), qPCR results of the microbial community indicate that the Thiomonas sp. represents ~55% of the total micro-organisms in the top 1 cm of the AMD microbial community. Although supersaturated with respect to cinnabar and metacinnabar, microcosms inoculated with the AMD microbial community were capable of releasing significantly more Hg into solution compared to inactivated or abiotic controls. Four different Hg-containing materials were tested for bacterially enhanced HgS dissolution: pure cinnabar, pure metacinnabar, mine tailings, and calcine material (processed ore). In the microcosm with metacinnabar, the presence of the AMD microbial community resulted in an increase of dissolved Hg concentrations up to 500 μg L-1 during the first 30 days of incubation. In abiotic control microcosms, dissolved Hg concentrations did not increase above 100 ng L-1. When Hg concentrations were below 50 μg L-1, the Fe-oxidizing bacteria in the AMD microbial community were still capable of oxidizing Fe(II) to Fe(III) in the AMD solution, whereas concentrations above 50 μg L-1 resulted in inhibition of microbial iron oxidation. Our experiments show that the AMD microbial community contributes to the dissolution of mercury sulfide minerals. These findings have major implications for risk assessment and future management of inoperative Hg mines worldwide. © 2013 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85186
Appears in Collections:影响、适应和脆弱性

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作者单位: Surface and Aqueous Geochemistry Group, Department of Geological and Environmental Sciences, Stanford University, Stanford, CA, United States; Center for Applied Geoscience, Eberhard KarlsUniversity of Tuebingen, Tuebingen, Germany; Mineral Resources Program, U.S. Geological Survey, Menlo Park, CA, United States; Department of Chemical Engineering, Stanford University, Stanford, CA, United States; Department of Photon Science and Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, United States

Recommended Citation:
Jew A.D.,Behrens S.F.,Rytuba J.J.,et al. Microbially enhanced dissolution of HgS in an acid mine drainage system in the California Coast Range[J]. Geobiology,2014-01-01,12(1)
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