An isotope hydrochemical approach to understand fluoride release into groundwaters of the Datong Basin, Northern China

Su, Chunli; Wang, Yanxin; Xie, Xianjun; Zhu, Yapeng

doi:10.1039/c4em00584h

Cited by 47 publications

(11 citation statements)

References 40 publications

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“…Su et al (2015) have observed fluoride concentration as high as 8.26 mg/L in groundwater of Datong basin in northern China. In dry regions (characterized by high evaporation rate and low rainfall), high fluoride concentrations in groundwater are due to fluoride dissolved from fluorine-bearing minerals (Zeng 1997).…”

Section: Chinamentioning

confidence: 98%

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Worldwide contamination of water by fluoride

et al. 2016

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Fluoride contamination in water is a major problem across the globe, with health hazards such as dental and skeletal fluorosis. Most earlier studies are confined to local or regional scales. As the problem has serious socioeconomic implications, there is a need for a global perspective. Thus, here we review worldwide research for nearly a century on fluoride contamination in water. We investigated the distribution of fluoride contamination in water, its sources, mobilization and association. The major findings are: (1) Anomalous fluoride concentration in groundwater is mainly confined to arid and semiarid regions of Asia and North Africa. (2) The geogenic sources of fluoride in water are mainly fluorine-bearing minerals in rocks and sediments, whereas anthropogenic sources of fluoride in water are mainly pesticides and industrial waste.(3) Fluoride mobilization from geogenic sources is mainly controlled by alkalinity and temperature. (4) Fluoride occurrence in water is associated with ions such as sodium, arsenic chloride and bicarbonate. There are few associations of fluoride in water with calcium and magnesium.

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Section: Chinamentioning

confidence: 98%

“…Conditions such as semiaridity and high temperature promote effective chemical weathering of fluorinebearing rocks such as granite, gneiss, sandstone and shale (Su et al 2015). Chemical weathering is most effective under arid to semiarid climatic conditions and, thus, may lead to higher fluoride and salinity content.…”

Section: Remark Referencesmentioning

confidence: 99%

Worldwide contamination of water by fluoride

et al. 2016

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“…Groundwater hydrochemistry is very important for understanding the interaction between groundwater and various aquifer minerals and the change of chemical composition (Su et al 2015). The hydro-chemical analysis results of Dali County groundwater sampling points in this study are shown in Table 6.…”

Section: General Chemistry and Uoride Status Of Groundwatermentioning

confidence: 99%

Characteristics and mechanism of spatial-temporal changes of fluorosis in typical high fluoride areas of Northwest China over the past 40 years

Liu

et al. 2022

Preprint

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Since the 1980s, China, especially the northwest part had carried out extensive water-improving project to reduce fluoride, but the fluorosis has not been completely eliminated. Through historical data comparison, on-site investigation and sample detection, combined with hydrochemical analysis and spatial analysis, this paper studied the 40 years’ changes of water fluoride and the control effect of fluorosis in the typical fluorosis areas Dali County of northwest China. Results show that from 1980 to 2017, benefited from the water-improving project, the fluoride in local residents' drinking water significantly decreased, with the median value declined from 2.40 to 1.26 mg/L, which further reduced fluorosis. As a typical water-improving area by low-fluoride water sources developing, in Dali, the generally dropped fluoride of groundwater is the root cause for the controlled endemic fluorosis. The enrichment of fluoride in groundwater here is controlled by the fluoride-rich geological background, landform and evaporative climate. The water environment characterized by slight alkalinity, rich sodium and low calcium is also an important factor. For the temporal changes of groundwater, human irrigation activities were considered as the primary role. Although the fluorosis has improved significantly, low residents' satisfaction and the rise of fluoride concentration in some water sources have led to a continuous high fluoride water drinking and fluorosis in some areas. It is suggested that the local government should strengthen water quality improvement from the aspects of low fluoride water source development and water supply management to consolidate the effect of fluorosis prevention and control.

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“…Na-HCO 3 type water with low Ca concentration favors the dissolution of fluorite and ion exchange between hydroxide ion and mineral fluorine (Su et al, 2013). Chemical weathering and/or dissolution of fluorine bearing minerals would cause the fluorine release into groundwater (Su et al, 2015). Al/Fe-rich poorly crystalline phases (e.g.…”

Section: Introductionmentioning

confidence: 99%