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Geochemical controls on fluoride concentrations in natural waters fromthe middle Loess Plateau, China
Xiao,J(Xiao,Jun)[1,2]; Jin,ZD(Jin,Zhangdong)[1,2]; Zhang,F(Zhang,Fei)[1,2]
2015-12
发表期刊Journal of Geochemical Exploration
卷号159期号:2015页码:252-261
文章类型期刊论文
摘要

Water resources play a key role in the development of regional economy and stability of ecosystem in the middle Loess Plateau, China. Spatial variability of fluoride (F−) and its geochemical control with other dissolved ions in the middle Loess Plateau were discussed. Samples were neutral to weak alkaline (pH = 7.4–9.6) with little variation of ion concentrations between river water and groundwater. The F− concentrations ranged from 0.2 to 3.1 mg/L, with an mean value of 0.9 mg/L. Approximately 31% of samples in northern and southern part of the study area were HCO3 −–Na+ water type with F− levels higher than the Chinese Drinking Water Standard of 1.0 mg/L. About 12% samples in the central part were HCO3 −–Ca2+ water type with F− content lesser than recommended value for caries control of 0.5 mg/L. The Quaternary deposits in the study area were the mainly F− sources of natural waters, and rainwater also contributed some F−. The alkaline characteristic of natural waters favored desorption of F− from hydrous metal oxides in loess, the climate of the study area, cation exchange, and CaCO3 precipitation further increased F− concentrations in natural waters in the middle Loess Plateau. Moreover, the chemical data analyzed in the principal component analysis (PCA) also indicated that climate coupled with geochemical processes was the main controlling factor for high F− in natural waters in the area. For the supply of high quality drinking water with safe F−, short-term and long-term action plans as well as awareness/education programs for the public were advocated.

关键词Fluoride Hydrogeochemistry Water–rock Interaction Factor Analysis Loess Plateau
DOI10.1016/j.gexplo.2015.09.018
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9467
专题加速器质谱中心
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China;
2.Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an 710061, China
推荐引用方式
GB/T 7714
Xiao,J,Jin,ZD,Zhang,F. Geochemical controls on fluoride concentrations in natural waters fromthe middle Loess Plateau, China[J]. Journal of Geochemical Exploration,2015,159(2015):252-261.
APA Xiao,J,Jin,ZD,&Zhang,F.(2015).Geochemical controls on fluoride concentrations in natural waters fromthe middle Loess Plateau, China.Journal of Geochemical Exploration,159(2015),252-261.
MLA Xiao,J,et al."Geochemical controls on fluoride concentrations in natural waters fromthe middle Loess Plateau, China".Journal of Geochemical Exploration 159.2015(2015):252-261.
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