Special speleothems in cement-grouting tunnels and their implications of;the atmospheric CO2 sink

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	Special speleothems in cement-grouting tunnels and their implications of;the atmospheric CO2 sink
	Liu, ZH; He, DB
刊名	ENVIRONMENTAL GEOLOGY
	1998
卷号	35 期号:4 页码:258-262
关键词	speleothem cement grouting atmospheric CO2 sink
ISSN号	0943-0105
英文摘要	Based on the analyses and comparisons of water chemistry, stable carbon isotopes and deposition rates of speleothems, the authors found that there are two kinds of speleothems in the tunnels at the Wujiangdu Dam site, Guizhou, China, namely the CO2-outgassing type and the CO2-absorbing type. The former is natural, as observed in general karst caves, and the product of karst processes under natural conditions. The latter, however, is special, resulting from the carbonation of a cement-grouting curtain and concrete. Due to the quick absorption of CO2 from the surrounding atmosphere, evidenced by the low CO2 content in the air and the high deposition rate of speleothems (as high as 10 cm/a) in the tunnels, the contribution of the carbonation process to the sink of CO2 in the atmosphere is important tin the order of magnitude of 10(8) tons c/a) and should be taken into consideration in the study of the global carbon cycle because of the use of cement on a worldwide scale.
学科主题	第四纪地质
WOS关键词	CALCITE PRECIPITATION ; CONCRETE CARBONATION ; FIELD-MEASUREMENTS ; PREDICTION ; RATES
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER VERLAG
WOS记录号	WOS:000076281200004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37277]
专题	中国地质调查局
作者单位	Inst Karst Geol, Guilin 541004, Peoples R China.
推荐引用方式 GB/T 7714	Liu, ZH,He, DB. Special speleothems in cement-grouting tunnels and their implications of;the atmospheric CO2 sink[J]. ENVIRONMENTAL GEOLOGY,1998,35(4):258-262.
APA	Liu, ZH,&He, DB.(1998).Special speleothems in cement-grouting tunnels and their implications of;the atmospheric CO2 sink.ENVIRONMENTAL GEOLOGY,35(4),258-262.
MLA	Liu, ZH,et al."Special speleothems in cement-grouting tunnels and their implications of;the atmospheric CO2 sink".ENVIRONMENTAL GEOLOGY 35.4(1998):258-262.