title: Evaluation of the fate of arsenic-contaminated groundwater at different aquifers of Thar coalfield Pakistan.
abstract: In present study, the ground water at different aquifers was evaluated for physicochemical parameters, iron, total arsenic, total inorganic arsenic and arsenic species (arsenite and arsenate). The samples of groundwater were collected at different depths, first aquifer (AQ1) 50-60 m, second aquifer (AQ2) 100-120 m, and third aquifer (AQ3) 200-250 m of Thar coalfield, Pakistan. Total inorganic arsenic was determined by solid phase extraction using titanium dioxide as an adsorbent. The arsenite was determined by cloud point extraction using ammonium pyrrolidinedithiocarbamate as a chelating reagent, and resulted complex was extracted by Triton X-114. The resulted data of groundwater were reported in terms of basic statistical parameters, principal component, and cluster analysis. The resulted data indicated that physicochemical parameters of groundwater of different aquifers were exceeded the World Health Organization provisional guideline for drinking water except pH and SO4(2-). The positive correlation was observed between arsenic species and physicochemical parameters of groundwater except F(-) and K(+), which might be caused by geochemical minerals. Results of cluster analysis indicated that groundwater samples of AQ1 was highly contaminated with arsenic species as compared to AQ2 and AQ3 (p > 0.05).
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. ajamshed75@yahoo.com.
authors.forename: Jamshed
authors.initials: J
authors.lastname: Ali
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. tgkazi@yahoo.com.
authors.forename: Tasneem G
authors.initials: TG
authors.lastname: Kazi
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. jab_mughal@yahoo.com.
authors.forename: Jameel A
authors.initials: JA
authors.lastname: Baig
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. hassanimranafridi@yahoo.com.
authors.forename: Hassan I
authors.initials: HI
authors.lastname: Afridi
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. mariamshazadi29@yahoo.com.
authors.forename: Mariam S
authors.initials: MS
authors.lastname: Arain
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. naeemullah433@yahoo.com.
authors.forename: Naeem
authors.initials: N
authors.lastname: Ullah
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. kr_brahman@yahoo.com.
authors.forename: Kapil D
authors.initials: KD
authors.lastname: Brahman
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. ssadiashafi@gmail.com.
authors.forename: Sadaf S
authors.initials: SS
authors.lastname: Arain
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan. haleem_analyst@yahoo.com.
authors.forename: Abdul H
authors.initials: AH
authors.lastname: Panhwar
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000032:analysis*; D060766:Drinking Water / Q000032:analysis; D060587:Groundwater / Q000032:analysis*; D007501:Iron / Q000032:analysis; D017830:Octoxynol; D010154:Pakistan; D011092:Polyethylene Glycols; D052616:Solid Phase Extraction; D014025:Titanium / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality
chemical_list: D060766:Drinking Water; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D011092:Polyethylene Glycols; D017830:Octoxynol; C010615:Nonidet P-40; D014025:Titanium; D007501:Iron; D001151:Arsenic
keywords: Aquifers; Arsenic speciation; Groundwater; Physicochemical parameters; Thar coalfield