The evaluation of arsenic contamination potential, speciation and hydrogeochemical behaviour in aquifers of Punjab, Pakistan

Chemosphere
Muhammad Bilal ShakoorAndreas Lüttge

Abstract

In this study, we tested 123 groundwater wells from five different areas of Punjab, Pakistan for arsenic (As) contamination level and species, as well as delineated hydrogeochemical behaviour of As in aquifers. Results revealed that 75% and 41% of the groundwater wells exceeded the safe As limit of World Health Organisation (WHO, 10 μg L-1) and Pakistan-EPA (50 μg L-1), respectively. Arsenite (As(III)) and arsenate (As(V)) spanned 0-80% and 20-100% of total As (1.2-206 μg L-1), respectively. The mean As content (5.2 μg L-1) of shallow wells at 9-40 m depth did not exceed the WHO safe limit, representing a safe aquifer zone for pumping of groundwater compared to deeper wells at 41-90 m (51 μg L-1) and >90 m (23 μg L-1) depths. Piper-plot elucidated that the aqueous chemistry was dominated with Na-SO4, Na-Ca-SO4, Na-Mg-SO4 type saline water. Principal component analysis grouped As concentration with well depth, pH, salinity, Fe and CO3, exhibiting that these hydrogeochemical factors could have potential role in controlling As release/sequestration into the aquifers of study area. Geochemical modeling showed positive saturation indices only for iron (Fe) oxide-phases, indicating Fe oxides as the major carriers of As. Overall, this...Continue Reading

Citations

May 6, 2019·Environmental Science and Pollution Research International·Muhammad Sohail SattarAsim Jilani
May 6, 2019·Environmental Geochemistry and Health·Ali Haidar ShahNabeel Khan Niazi
Nov 7, 2019·International Journal of Phytoremediation·Muhammad Bilal ShakoorJörg Rinklebe
May 5, 2018·International Journal of Environmental Research and Public Health·Sana KhalidNabeel Khan Niazi
Dec 19, 2018·Environmental Science and Pollution Research International· NatashaNabeel Khan Niazi
Sep 20, 2018·Environmental Science and Pollution Research International·Ashfaq AhmadWajid Nasim
Nov 13, 2019·Environmental Geochemistry and Health·Behzad MurtazaMuhammad Amjad
Feb 28, 2019·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Aamira TariqIrfan Sadiq
Feb 14, 2021·The Science of the Total Environment·Muhammad Mahroz HussainHua Zhang
Apr 7, 2021·Journal of Environmental Management·Luisa Cardoso MaiaLeandro Vinícius Alves Gurgel
Sep 25, 2018·Environmental Pollution·Zhaojun LinBaoshan Xing
Jun 1, 2021·Geochimica Et Cosmochimica Acta·Anand KumarAlexander van Geen
Jul 8, 2021·Journal of Hazardous Materials·Inna KurganskayaAndreas Luttge

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