Arid
DOI10.1016/j.scitotenv.2015.05.038
Geochemical controls of high fluoride groundwater in Umarkot Sub-District, Thar Desert, Pakistan
Rafique, Tahir1; Naseem, Shahid2; Ozsvath, David3; Hussain, Riaz4; Bhanger, Muhammad Iqbal5; Usmani, Tanzil Haider1
通讯作者Rafique, Tahir
来源期刊SCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
出版年2015
卷号530页码:271-278
英文摘要

Groundwater samples (n = 152) were collected in the Thar Desert of the Umarkot Sub-District, Pakistan to evaluate the geochemical controls on the occurrence of high fluoride (F-) levels within the study area. Fluoride concentrations range from 0.06 to 44.4 mg/L, with mean and median values of 5.22 and 4.09 mg/L, respectively; and roughly 84% of the samples contain fluoride concentrations that exceed the 1.5 mg/L drinking water standard set by WHO. The overall groundwater quality reflects the influences of silicate mineral weathering and evaporation. Fluoride originates from the weathering of minerals derived from Type-A granite and possibly anion exchange (OH- for F-) on clays and weathered micas under high pH conditions. High fluoride levels are associated with Na-HCO3 type water produced by calcite precipitation and/or base ion exchange. Depleted calcium levels in groundwater allow higher fluoride concentrations to occur before the solubility limit for fluorite is reached. (C) 2015 Elsevier B.V. All rights reserved.


英文关键词Fluoride ions Mineral weathering Evaporation Calcite precipitation Base ion exchange Umarkot Thar Desert
类型Article
语种英语
国家Pakistan ; USA
收录类别SCI-E
WOS记录号WOS:000356605800031
WOS关键词WATER-ROCK INTERACTION ; BEDROCK GROUNDWATER ; SOUTH-KOREA ; AREA ; INDIA ; CHEMISTRY ; BASIN ; HYDROGEOCHEMISTRY ; CONTAMINATION ; BICARBONATE
WOS类目Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/190368
作者单位1.Appl Chem Res Ctr, Karachi 75280, Pakistan;
2.Univ Karachi, Dept Geol, Karachi 75270, Pakistan;
3.Univ Wisconsin, Dept Geog Geol, Stevens Point, WI 54481 USA;
4.Geol Survey Pakistan, Div Geophys, Karachi, Pakistan;
5.Univ Karachi, ICCBS, HEJ Res Inst Chem, Karachi, Pakistan
推荐引用方式
GB/T 7714
Rafique, Tahir,Naseem, Shahid,Ozsvath, David,et al. Geochemical controls of high fluoride groundwater in Umarkot Sub-District, Thar Desert, Pakistan[J],2015,530:271-278.
APA Rafique, Tahir,Naseem, Shahid,Ozsvath, David,Hussain, Riaz,Bhanger, Muhammad Iqbal,&Usmani, Tanzil Haider.(2015).Geochemical controls of high fluoride groundwater in Umarkot Sub-District, Thar Desert, Pakistan.SCIENCE OF THE TOTAL ENVIRONMENT,530,271-278.
MLA Rafique, Tahir,et al."Geochemical controls of high fluoride groundwater in Umarkot Sub-District, Thar Desert, Pakistan".SCIENCE OF THE TOTAL ENVIRONMENT 530(2015):271-278.
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