The provenance of deep groundwater and its relation to arsenic distribution in the northwestern Hetao Basin, Inner Mongolia

被引：0
|
作者：
Liu, Shuai [1 ,2 ]
Guo, Huaming [1 ,2 ]
Lu, Hai [3 ]
Zhang, Zhuo [2 ]
Zhao, Weiguang [2 ]
机构：
[1] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China
[2] China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
[3] Natl Inst Metrol, Beijing 100013, Peoples R China
来源：
16TH INTERNATIONAL SYMPOSIUM ON WATER-ROCK INTERACTION (WRI-16) AND 13TH INTERNATIONAL SYMPOSIUM ON APPLIED ISOTOPE GEOCHEMISTRY (1ST IAGC INTERNATIONAL CONFERENCE) | 2019年 / 98卷
基金：
中国国家自然科学基金;
关键词：
CONTAMINATION; WATER;
D O I：
10.1051/e3sconf/20199809015
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
High arsenic (As) groundwater has been found in deep aquifer of the northwestern Hetao Basin. Little is known about the source of high As deep groundwater and its role in As distribution. Based on strontium (Sr) isotopes, this study aims to investigate the provenance of high arsenic deep groundwater (DGW). Sr-87/Sr-86 in DGW gradually decreased from the alluvial fans to the flat plain. Results show that fissure water, plagioclase dissolution, and shallow groundwater (SGW) controlled the Sr-87/Sr-86 variation. Although the reductive dissolution of As-containing iron oxide controlled the As mobilization, the leaching of phyllite and meta-basalt, incongruent dissolution of plagioclase, and vertical mixing with SGW also played an important role in increasing As concentrations in DGW approximately along the flow paths.
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页数：4
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