Experimental Study of Weathering of Serpentine and Olivine by Aspergillus Fumigatus
详细信息
- 责任者：Yao Minjie (State Key Laboratory of Environmental Geochemistry ; Institute of Geochemistry ; Chinese Academy of Sciences ; Guiyang 550002 ; China) ; Lian Bin
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(9)
- 关键词：蛇纹石 ; serpentine ; 橄榄石 ; olivine ; weathering
- 页码：p.1477-1485
- 图表：4 illus., 2 tables, 43 refs.
- 分类号：0100
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
///Mg-bearing silicate minerals are very important natural resources,which are developed and exploited widely using the traditional chemical methods at home and abroad,yet microbial releasing of magnesium and silicon from silicate minerals has not been reported.This paper mainly studied weathering of silicatic minerals such as serpentine and olivine through Aspergillus fumigatus TH003 using the methods of shake culture and control groups.Concentrations of Mg2+ and Si in the first 5,10,20,30d,the changes of pH value,and metabolites have been analysed using ICP-OES and GC-MS,and microbe and mineral congeries were observed using SEM and TEM.The results demonstrate that change of the concentrations of Mg2+ and Si in the solutions of serpentine and olivine is related not only to growth of the Aspergillus fumigatus but to crystal structures of minerals,with serpentite easily prone to weathering than olivine through Aspergillus fumigatus.In addition,acidic metabolites produced during the growth of Aspergillus fumigatus are conductive to weathering of minerals. Therefore, the research will provide some basic information for studying the process and mechanism of fungi-mineral interaction,and for the microbial development and utility of serpentine and olivine in industry.
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