globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12199
Scopus记录号: 2-s2.0-84978805842
论文题名:
Transformation of galena to pyromorphite produces bioavailable sulfur for neutrophilic chemoautotrophy
作者: Walczak A.B.; Kafantaris F.-C.A.; Druschel G.K.; Yee N.; Young L.Y.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2016
卷: 14, 期:6
起始页码: 599
结束页码: 606
语种: 英语
Scopus关键词: bioavailability ; biomass ; chemical weathering ; chemoautotrophy ; contaminated land ; galena ; lead ; oxic conditions ; oxidation ; phosphate ; secondary mineral ; solubility ; thiosulfate ; transformation ; lead ; lead sulfide ; mineral ; phosphate ; pyromorphite ; sulfide ; sulfur ; bioavailability ; Bradyrhizobiaceae ; chemistry ; chemoautotrophy ; growth, development and aging ; metabolism ; oxidation reduction reaction ; Biological Availability ; Bradyrhizobiaceae ; Chemoautotrophic Growth ; Lead ; Minerals ; Oxidation-Reduction ; Phosphates ; Sulfides ; Sulfur
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: The aqueous concentration of lead [Pb(II)] in geochemical environments is controlled by the solubility of Pb-bearing minerals and their weathering products. In contaminated soils, a common method for in situ stabilization of Pb(II) is the addition of phosphate to convert more redox sensitive sulfide minerals into sparingly soluble pyromorphite [Pb5(PO4)3X]. In this study, we conducted experimental studies to investigate the fate of reduced sulfur during the conversion of galena [PbS] to chloropyromorphite [Pb5(PO4)3Cl]. Powder X-ray diffraction analysis indicated that the reaction of phosphate with galena under oxic conditions resulted in the oxidation of sulfide and formation of elemental sulfur [S8]. Under oxic abiotic conditions, the S8 was retained in the solid phase, and negligible concentrations of sulfur as sulfide and thiosulfate were detected in the aqueous phase and only a small amount of sulfate. When PbS reacted in the presence of the chemoautotrophic organism Bosea sp. WAO, the S8 in the secondary mineral was oxidized to sulfate. Strain WAO produced significantly more sulfate from the secondary S8 than from the primary galena. Microscopic analysis of mineral–microbe aggregates on mineral-embedded slide cultures showed that the organism was colocalized and increased in biomass over time on the secondary mineral surface supporting a microbial role. The results of this study indicate that stimulation of sulfur-oxidizing activity may be a direct consequence of phosphate amendments to Pb(II)-contaminated soils. © 2016 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/85091
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, United States; Department of Earth Sciences, Indiana University-Purdue University, Indianapolis, IN, United States

Recommended Citation:
Walczak A.B.,Kafantaris F.-C.A.,Druschel G.K.,et al. Transformation of galena to pyromorphite produces bioavailable sulfur for neutrophilic chemoautotrophy[J]. Geobiology,2016-01-01,14(6)
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