干旱区生态环境知识资源中心(Arid): Elucidating various geochemical mechanisms drive fluoride contamination in unconfined aquifers along the major rivers in Sindh and Punjab, Pakistan

Arid

DOI	10.1016/j.envpol.2019.03.043
	Elucidating various geochemical mechanisms drive fluoride contamination in unconfined aquifers along the major rivers in Sindh and Punjab, Pakistan
	Ali, Waqar 1,2; Aslam, Muhammad Wajahat 1,2; Junaid, Muhammad 3; Ali, Kamran 4; Guo, Yongkun 1,5; Rasool, Atta 1,2; Zhang, Hua 1
通讯作者	Zhang, Hua
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2019
卷号	249 页码:535-549
英文摘要	The present study aims to investigate the spatial distribution and associated various geochemical mechanisms responsible for fluoride (F-) contamination in groundwater of unconfined aquifer system along major rivers in Sindh and Punjab, Pakistan. The concentration of F (-) in groundwater samples ranged from 0.1 to 3.9 mg/L (mean = 1.0 mg/L) in Sindh and 0.1-10.3 mg/L (mean = 1.0 mg/L) in Punjab, respectively with 28.9% and 26.6% of samples exhibited F- contamination beyond WHO permissible limit value (1.5 mg/L). The geochemical processes regulated F- concentration in unconfined aquifer mainly in Sindh and Punjab were categorized as follows: 1) minerals weathering that observed as the key process to control groundwater chemistry in the study areas, 2) the strong correlation between F- and alkaline pH, which provided favorable environmental conditions to promote F- leaching through desperation or by ion exchange process, 3) the 72.6% of samples from Sindh and Punjab were dominated by Na+- Cl- type of water, confirmed that the halite dissolution process was the major contributor for F- enrichment in groundwater, 4) dolomite dissolution was main process frequently observed in Sindh, compared with Punjab, 5) the arid climatic conditions promote evaporation process or dissolution of evaporites or both were contributing to the formation of saline groundwater in the study area, 6) the positive correlation observed between elevated F- and fluorite also suggested that the fluorite dissolution also played significant role for leaching of F- in groundwater from sediments, and 7) calcite controlled Ca2+ level and enhanced the dissolution of F-bearing minerals and drive F- concentration in groundwater. In a nut shell, this study revealed the worst scenarios of F- contamination via various possible geochemical mechanisms in groundwater along major rivers in Sindh and Punjab, Pakistan, which need immediate attention of regulatory authorities to avoid future hazardous implications. (C) 2019 Elsevier Ltd. All rights reserved.
英文关键词	Fluoride Groundwater Mechanisms Unconfined aquifer Pakistan
类型	Article
语种	英语
国家	Peoples R China ; Pakistan
收录类别	SCI-E
WOS记录号	WOS:000471081300059
WOS关键词	DRINKING-WATER ; HEALTH-RISK ; HYDROGEOCHEMICAL PROCESSES ; GROUNDWATER RESOURCES ; COASTAL AQUIFERS ; TRACE-ELEMENTS ; YUNCHENG BASIN ; HEAVY-METALS ; TAMIL-NADU ; DISTRICT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215490
作者单位	1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Peking Univ, Shenzhen Grad Sch, Sch Environm & Energy, Key Lab Heavy Met Pollut Control & Reutilizat, Shenzhen 518055, Peoples R China; 4.NUST, SCEE, IESE, Islamabad, Pakistan; 5.Sichuan Normal Univ, Collage Life Sci, Chengdu, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Ali, Waqar,Aslam, Muhammad Wajahat,Junaid, Muhammad,et al. Elucidating various geochemical mechanisms drive fluoride contamination in unconfined aquifers along the major rivers in Sindh and Punjab, Pakistan[J]. 北京大学,2019,249:535-549.
APA	Ali, Waqar.,Aslam, Muhammad Wajahat.,Junaid, Muhammad.,Ali, Kamran.,Guo, Yongkun.,...&Zhang, Hua.(2019).Elucidating various geochemical mechanisms drive fluoride contamination in unconfined aquifers along the major rivers in Sindh and Punjab, Pakistan.ENVIRONMENTAL POLLUTION,249,535-549.
MLA	Ali, Waqar,et al."Elucidating various geochemical mechanisms drive fluoride contamination in unconfined aquifers along the major rivers in Sindh and Punjab, Pakistan".ENVIRONMENTAL POLLUTION 249(2019):535-549.