Formation of sphalerite (ZnS) deposits in natural biofilms of sulfate-reducing bacteria

被引：466

作者：

Labrenz, M ^{[1
]}

Druschel, GK ^{[1
]}

Thomsen-Ebert, T ^{[1
]}

Gilbert, B ^{[1
]}

Welch, SA ^{[1
]}

Kemner, KM ^{[1
]}

Logan, GA ^{[1
]}

Summons, RE ^{[1
]}

De Stasio, G ^{[1
]}

Bond, PL ^{[1
]}

Lai, B ^{[1
]}

Kelly, SD ^{[1
]}

Banfield, JF ^{[1
]}

机构：

[1] Oregon State Univ, Dept Geosci, US Geol Survey, Corvallis, OR 97331 USA

来源：

SCIENCE | 2000年 / 290卷 / 5497期

关键词：

D O I：

10.1126/science.290.5497.1744

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Abundant, micrometer-scale, spherical aggregates of 2- to 5-nanometer-diameter sphalerite (ZnS) particles formed within natural biofilms dominated by relatively aerotolerant sulfate-reducing bacteria of the family Desulfobacteriaceae. The biofilm zinc concentration is about 10(6) times that of associated groundwater (0.09 to 1.1 parts per million line). Sphalerite also concentrates arsenic (0.01 weight %) and selenium (0.004 weight %). The almost monomineralic product results from buffering of sulfide concentrations at Low values by sphalerite precipitation. These results show how microbes control metal concentrations in groundwater- and wetland-based remediation systems and suggest biological routes for formation of some Low-temperature ZnS deposits.

引用

页码：1744 / 1747

页数：4

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