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Geochemical Evolution of Fluoride and Implication for F- Enrichment in Groundwater: Example from the Bilate River Basin of Southern Main Ethiopian Rift
Haji, Muhammed1,2,3; Wang, Dongdong1,2,3; Li, Lu1,2,3; Qin, Dajun1,2,4; Guo, Yi1,2,3
2018-12-01
发表期刊WATER
ISSN2073-4441
卷号10期号:12页码:20
摘要Groundwater is the most important source of drinking water. Fluoride was found in high concentrations in the groundwater from deep wells of the water supply in the southern main Ethiopian rift. The high concentration of fluoride is dominantly geogenic rather than anthropogenic in origin, as the agricultural area was not found to be contaminated with NO3-. Knowledge of fluoride enrichment will help to provide management plans for developing deep groundwater and minimizing the health risks of exposure to fluoride. The chemical processes of fluoride were investigated in the waters in the Bilate River basin using hydrochemical and isotopic tools. The F- concentration ranged from 0.5 to 1.29 mg/L in water from shallow wells and from 0.48 to 5.61 mg/L in water from deep wells. Seventy percent of deep well samples had F- > 1.5 mg/L higher than the World Health Organization potable guideline. The high fluoride concentration in the groundwater was mainly situated in the rift valley of the Bilate River basin, in contrast with low F- groundwater in the highland. The concentration of fluoride was lowest in Ca-Mg-HCO3 type groundwater and highest in Na-HCO3 type groundwater. Moreover, F- was positively correlated with HCO3-, Na+, Na+/Ca2+ and pH in groundwater and Na+/Ca2+ ratios were increased along the flow path. Hydrogeological, hydrodynamic and hydrochemical conditions are responsible for fluoride accumulation in the deep aquifers. Strong dynamic flow in highland areas flush away weathered chemical components (e.g., F-). Thus, surficial weathering is not a major controlling factor for high concentrations of Fluoride in deep groundwater but the combination of silicate hydrolysis and ion exchange mainly control fluoride enrichment in stagnant flow environments.
关键词fluoride hydrochemical characteristics water-rock interaction geochemical modeling bilate river basin South Ethiopia
DOI10.3390/w10121799
资助者CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China
关键词[WOS]GUARANI AQUIFER SYSTEM ; DRINKING-WATER ; AQUEOUS GEOCHEMISTRY ; DENTAL FLUOROSIS ; RICH GROUNDWATER ; KENYA ; PART ; AFAR
语种英语
资助项目CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China[41172215]
资助者CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; CAS-TWAS President's Fellowship for International PhD Students ; CAS-TWAS President's Fellowship for International PhD Students ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China
WOS研究方向Water Resources
WOS类目Water Resources
WOS记录号WOS:000455314300094
出版者MDPI
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90216
专题页岩气与地质工程院重点实验室
通讯作者Qin, Dajun
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Sanya Univ, Academician Zhaiming Guo Working Stn, Sanya 572000, Hainan, Peoples R China
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GB/T 7714
Haji, Muhammed,Wang, Dongdong,Li, Lu,et al. Geochemical Evolution of Fluoride and Implication for F- Enrichment in Groundwater: Example from the Bilate River Basin of Southern Main Ethiopian Rift[J]. WATER,2018,10(12):20.
APA Haji, Muhammed,Wang, Dongdong,Li, Lu,Qin, Dajun,&Guo, Yi.(2018).Geochemical Evolution of Fluoride and Implication for F- Enrichment in Groundwater: Example from the Bilate River Basin of Southern Main Ethiopian Rift.WATER,10(12),20.
MLA Haji, Muhammed,et al."Geochemical Evolution of Fluoride and Implication for F- Enrichment in Groundwater: Example from the Bilate River Basin of Southern Main Ethiopian Rift".WATER 10.12(2018):20.
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