Nanocrystalline Nickel and Cobalt Sulfides Formed by a Heavy Metal-Tolerant, Sulfate-Reducing Enrichment Culture

被引：21
|
作者：
Sitte, Jana [1 ]
Pollok, Kilian [2 ,3 ]
Langenhorst, Falko [3 ]
Kuesel, Kirsten [1 ]
机构：
[1] Univ Jena, Inst Ecol, D-07743 Jena, Germany
[2] Univ Bayreuth, Bayer Geoinst, Bayreuth, Germany
[3] Univ Jena, Inst Geosci, D-07743 Jena, Germany
来源：
GEOMICROBIOLOGY JOURNAL | 2013年 / 30卷 / 01期
关键词：
sulfate reduction; metal sulfides; nanocrystals; heavy metal tolerance; X-RAY-DIFFRACTION; HYDROGEN-SULFIDE; ALPHA-NIS; BACTERIA; REDUCTION; RESISTANCE; SEDIMENTS; URANIUM; PRECIPITATION; TOXICITY;
D O I：
10.1080/01490451.2011.653082
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A soil enrichment culture of the sulfate-reducers Desulfosporosinus auripigmenti and Citrobacter freundii and of fermentative bacteria from a former uranium-mining site was studied for its metal retention potential by promoting metal sulfide precipitation. The culture could tolerate up to 30 mM Ni and 40 mM Co. XRD and TEM analyses revealed the formation of amorphous NiS together with nanocrystalline, metastable alpha-NiS, and nanocrystalline cobalt pentlandite. The alpha-NiS with a grain size of 5 nm shows probably an example of size-dependent phase stability and/or specific biomineralization precipitation paths. Detailed mineralogical characterizations are necessary to correctly assess the mineral inventory and thus metal bioavailability.
引用
收藏
页码：36 / 47
页数：12
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