干旱区生态环境知识资源中心(Arid): Hydrogeochemical characterization of a possible carbon sink from shallow saline-alkaline groundwater in the eastern Hetao Basin of Inner Mongolia in China

Arid

DOI	10.1039/d0em00415d
	Hydrogeochemical characterization of a possible carbon sink from shallow saline-alkaline groundwater in the eastern Hetao Basin of Inner Mongolia in China
	Yu, Junxia; Jiao, Yan; Yang, Wenzhu; Yang, Jie; Liu, Lijia
通讯作者	Jiao, Y ; Yang, WZ (corresponding author), Inner Mongolia Normal Univ, Chem & Environm Sci Coll, Hohhot 010022, Peoples R China. ; Jiao, Y ; Yang, WZ (corresponding author), Inner Mongolia Key Lab Environm Chem, Hohhot 010022, Peoples R China.
来源期刊	ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
ISSN	2050-7887
EISSN	2050-7895
出版年	2021
卷号	23 期号:2 页码:344-356
英文摘要	The question of how saline-alkaline groundwater can be used as a CO2 sink in arid saline-alkaline areas remains controversial. This study investigates the role of saline-alkaline groundwater as a CO2 sink using a mass balance method, Gibbs diagrams of the hydrochemistry, and carbon isotope (delta C-13(DIC)) measurements. Twenty-eight groundwater samples of varying electrical conductivity (EC; 1.52-52.34 mS cm(-1)) were collected at different depths (1-2 and 5-25 m) in the Hetao Basin of Inner Mongolia, China. The results showed that groundwater ions could be primarily concentrated from water-rock interactions and evaporation, and that there are two main groundwater types: a mixed Na center dot Ca center dot Mg-Cl center dot SO4 center dot HCO3 type and a Na-Cl type. The dissolved inorganic carbon (DIC) concentration in samples obtained from a depth of 1-2 m was less than that in samples from 5-25 m, and a downward migration trend of DIC in the groundwater was observed. The DIC concentration exhibited a significant positive correlation with pH (R-2 = 0.61, p < 0.05) and the saturation index of carbonates (R-2 = 0.93, p < 0.01). Groundwater with a higher pH contained a higher DIC concentration and could provide strong carbon sink potential. The delta C-13(DIC) values of the groundwater samples varied from -21.22 parts per thousand to -11.02 parts per thousand, indicating that DIC was derived from the dissolution equilibrium of pedogenic carbonates and atmospheric/soil CO2. The carbon sequestration of the shallow saline-alkaline groundwater in the Hetao Basin could reach 4.66 x 10(8) g C a(-1), which represents important potential of carbon sink in the biogeochemical cycle.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000625246400010
WOS类目	Chemistry, Analytical ; Environmental Sciences
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367894
作者单位	[Yu, Junxia; Jiao, Yan; Yang, Wenzhu; Yang, Jie; Liu, Lijia] Inner Mongolia Normal Univ, Chem & Environm Sci Coll, Hohhot 010022, Peoples R China; [Yu, Junxia; Jiao, Yan; Yang, Wenzhu; Yang, Jie; Liu, Lijia] Inner Mongolia Key Lab Environm Chem, Hohhot 010022, Peoples R China
推荐引用方式 GB/T 7714	Yu, Junxia,Jiao, Yan,Yang, Wenzhu,et al. Hydrogeochemical characterization of a possible carbon sink from shallow saline-alkaline groundwater in the eastern Hetao Basin of Inner Mongolia in China[J],2021,23(2):344-356.
APA	Yu, Junxia,Jiao, Yan,Yang, Wenzhu,Yang, Jie,&Liu, Lijia.(2021).Hydrogeochemical characterization of a possible carbon sink from shallow saline-alkaline groundwater in the eastern Hetao Basin of Inner Mongolia in China.ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS,23(2),344-356.
MLA	Yu, Junxia,et al."Hydrogeochemical characterization of a possible carbon sink from shallow saline-alkaline groundwater in the eastern Hetao Basin of Inner Mongolia in China".ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS 23.2(2021):344-356.