干旱区生态环境知识资源中心(Arid): Groundwater fluoride and arsenic mobilization in a typical deep aquifer system within a semi-arid basin

Arid

DOI	10.1016/j.jhydrol.2022.127767
	Groundwater fluoride and arsenic mobilization in a typical deep aquifer system within a semi-arid basin
	Li, Chengcheng; Gao, Xubo; Zhang, Xin; Wang, Yanxin; Howard, Ken
通讯作者	Gao, XB
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2022
卷号	609
英文摘要	Contamination of groundwater with fluoride and arsenic in deep aquifers poses new health challenges worldwide. Integrated hydrogeochemical parameters with multiple isotopes (delta O-18, delta H-2, delta C-13, delta S-34, Sr-87/Sr-86 and C-14) is applied to demonstrate the origins and evolutions of deep groundwater and mobilization of groundwater solutes, fluoride and arsenic at Yuncheng Basin, northern China. Over 80% of deep samples have elevated fluoride (up to 3.73 mg/L) and/or arsenic values (up to 24.3 mu g/L) above the WHO guideline of 1.5 mg/L and 10 mu g/L, respectively. Deep saline groundwater normally belongs to Na-SO4-(Cl) type and is characterized by distinctly depleted delta O-18 and delta H-2 values (as low as -10.4%o and -78.5%o, respectively) than deep fresh water and shallow groundwater, indicating palaeo-climatic effect. Results of ionic ratios and isotopes reveal that three types of solute sources are delineated for deep aquifers. Deep saline groundwater with old residence times of ~ 11000 yrs showed the most depleted delta O-18 and delta H-2 values, high B/Cl and low Br/Cl, pointing towards the palaeo-saline water for the locally distributed groundwater solutes in the Qiji and Wenxi County. Saline sample near the faults with residence time of 7403 yrs showed strong evidence of a geothermal origin. In the central basin, some deep groundwater yield modern ages (3696 yrs and 4348 yrs), higher salinities (up to 1200 mg/L) and lower delta S-34 values (8.74%o-9.96%o), indicating the vertical leakage of shallow groundwater suffering from pyrite oxidation. High F-As fresh groundwater, characterized by Na-HCO3(-SO4) type with diverse hydrogeochemical and isotopic compositions, are evolved in closed reducing environment and semi-closed facultative environment and controlled by palaeo-recharge and shallow leakage, respectively. Organic degradation mainly controls the enrichment of arsenic and fluoride in groundwater.
英文关键词	High fluoride-arsenic Groundwater solutes Palaeo recharge Shallow leakages Hydrochemistry-isotopes Semi -arid area
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000795140400002
WOS关键词	STABLE-ISOTOPE ; RIVER-BASIN ; CARBONATE ; WATER ; FRACTIONATION ; CONTAMINATION ; GEOCHEMISTRY ; ADSORPTION ; EVOLUTION ; SULFATE
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393488
推荐引用方式 GB/T 7714	Li, Chengcheng,Gao, Xubo,Zhang, Xin,et al. Groundwater fluoride and arsenic mobilization in a typical deep aquifer system within a semi-arid basin[J],2022,609.
APA	Li, Chengcheng,Gao, Xubo,Zhang, Xin,Wang, Yanxin,&Howard, Ken.(2022).Groundwater fluoride and arsenic mobilization in a typical deep aquifer system within a semi-arid basin.JOURNAL OF HYDROLOGY,609.
MLA	Li, Chengcheng,et al."Groundwater fluoride and arsenic mobilization in a typical deep aquifer system within a semi-arid basin".JOURNAL OF HYDROLOGY 609(2022).