Biomediated Precipitation of Calcium Carbonate in a Slightly Acidic Hot Spring, Yunnan Province

doi:10.1111/1755-6724.13068

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海极端环境模拟研究实验室

	Biomediated Precipitation of Calcium Carbonate in a Slightly Acidic Hot Spring, Yunnan Province
	Qiao, Haijun 1; Xu, Hengchao2 ; Jiang, Lei2
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2017-02-01
卷号	91 期号:1 页码:145-155
关键词	Bio-mediated Calcium Carbonate Slightly Acidic Hot Spring Yunnan Province
DOI	10.1111/1755-6724.13068
文献子类	Article
英文摘要	A slightly acidic hot spring named Female Tower (t=73.5 degrees C, pH=6.64) is located in the Jifei Geothermal Field, Yunnan Province, southwestern China. The precipitates in the hot spring are composed of large amounts of calcite, aragonite and sulfur. Scanning electron microscopy (SEM) analyses reveal that the microbial mats were formed from various coccoid or rod-shaped filamentous microbes. Transmission electron microscopy (TEM) shows that the intracellular sulfur granules are commonly associated with these microbes. A culture-independent molecular phylogenetic analysis demonstrates that the majority of the bacteria in the spring are sulfur-oxidizing bacteria. In the spring water, H2S concentration is up to 60 ppm, while SO(4)(2-)concentration is only about 10 ppm. We speculate that H2S might derive from sulfur-oxidizing bacteria in this hot spring water, leading to the intracellular formation of sulfur granules. Meanwhile, this reaction increased the pH in the micron-scale microdomains, which fosters the precipitation of calcium carbonate in the microbial mats. The results of this study indicate that the sulfur-oxidizing bacteria might play an important role in calcium carbonate precipitation in slightly acidic hot spring environments.
WOS关键词	YELLOWSTONE-NATIONAL-PARK ; REHAI GEOTHERMAL-FIELD ; SOUTHWESTERN CHINA ; MICROBIAL MATS ; SP-NOV. ; BIOFILMS ; CACO3 ; SULFURIHYDROGENIBIUM ; CRYSTALLIZATION ; MINERALIZATION
语种	英语
WOS记录号	WOS:000395768100010
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/1827]
专题	深海科学研究部_深海极端环境模拟研究实验室
作者单位	1.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Hainan, Peoples R China
推荐引用方式 GB/T 7714	Qiao, Haijun,Xu, Hengchao,Jiang, Lei. Biomediated Precipitation of Calcium Carbonate in a Slightly Acidic Hot Spring, Yunnan Province[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2017,91(1):145-155.
APA	Qiao, Haijun,Xu, Hengchao,&Jiang, Lei.(2017).Biomediated Precipitation of Calcium Carbonate in a Slightly Acidic Hot Spring, Yunnan Province.ACTA GEOLOGICA SINICA-ENGLISH EDITION,91(1),145-155.
MLA	Qiao, Haijun,et al."Biomediated Precipitation of Calcium Carbonate in a Slightly Acidic Hot Spring, Yunnan Province".ACTA GEOLOGICA SINICA-ENGLISH EDITION 91.1(2017):145-155.