E3S Web Conf.
Volume 98, 201916th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference)
|Number of page(s)||5|
|Section||Water-Rock Interaction Controlling Water Quality and Human Health Issues|
|Published online||07 June 2019|
Hydrochemical Characteristics of High-fluorine Groundwater in the Plain of the Yarkant River Basin, Northwest China
College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, 830052, P.R.China
2 Xinjiang Hydrology and Water Resources Engineering Research Center, Urumqi, 830052, P.R.China
3 Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100049, P.R.China
Study on regional distribution of high-fluorine groundwater will help to understand migration and transformation of fluorine, and provide the theoretical basis of low-fluorine groundwater exploration in high-fluorine groundwater areas. In this study, 74 shallow groundwater samples collected from plain area of the Yarkant River Basin in Xinjiang were analyzed. Results showed that the type I (low-fluorine groundwater, F-<1mg/L) was distributed in the piedmont plain, the type II (high-fluorine groundwater, 1mg/L≤F-<2mg/L) was distributed in the central and northeastern part of the basin, and the type III (high-fluorine groundwater F-≥2mg/L) was continuously distributed along the flow direction of river water in the western part of the basin. The average concentration of groundwater fluorine was 1.26 mg/L, with an exceeding standard rate of 48.65%. Groundwater cations were dominated by Ca2+ and Mg2+ and anions were dominated by SO42- and Cl-. High-fluorine groundwater occurred under neutral to weak alkaline environment with pH ranged between 6.61 and 7.99, which is favorable for the dissolution of fluorine-bearing minerals. Average concentration of total dissolved solids (TDS) in type I, type II and type III groundwater were 1657 mg/L, 3522 mg/L and 3724 mg/L, respectively. High-fluoride groundwater generally had high TDS concentrations.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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