NDLI: Sources, distributions of fluoride in waters and its influencing factors from an endemic fluorosis region in central Guizhou, China

Content Provider	Springer Nature Link
Author	Li, Xuexian Wu, Pan Han, Zhiwei Shi, Jinfang
Copyright Year	2016
Abstract	The use of high fluoride-content coal caused the severe coal-burning endemic fluorosis in Zhijin County, Guizhou Province, China. The long-term mine exploitation in this region is as an important source of acid mine drainage (AMD) and leads to the release of potential fluoride (F$^{−}$) into the surrounding waters. Aiming to investigate the source, hydrogeochemical characteristics and influencing factors of fluoride in waters of this area, a hydrogeological and geochemical research has been conducted in this study. Samples of various types of waters were collected and analyzed for major cations, major anions and TFe, Al; selected coal and gangue samples were analyzed for fluoride contents. The F$^{−}$ concentration in AMD or AMD-affected waters ranged from 0.27 to 4.94 mg/L, and F$^{−}$ was mainly enriched in Na–SO$_{4}$ and Mg–SO$_{4}$ waters, but a relatively low F$^{−}$ concentration was found in the Ca–SO$_{4}$ water. The F$^{−}$ concentration in the Ca–HCO$_{3}$ water without being affected by AMD ranged from 0.01 to 0.20 mg/L. The elevated F$^{−}$ contents were found in the AMD, which is mainly influenced by the local coal mining activities, and it is resulted from the dissolution of fluoride-bearing minerals in coal-bearing clastic rocks, as well as the low pH values, high Al and Fe concentrations, high total dissolved solids and high Al/F ratio of the AMD. In addition, the dissolution/precipitation of carbonate rocks and special hydrogeological conditions determined the F$^{−}$ concentration in surface water. Meanwhile, the climate is also an influencing factor that cannot be ignored to affect the F$^{−}$ concentrations of surface water and groundwater.
Starting Page	1
Ending Page	14
Page Count	14
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	11
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-06-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fluoride Hydrochemistry Influence factors Coal mining area Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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