کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8851884 | 1618772 | 2018 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The evaluation of arsenic contamination potential, speciation and hydrogeochemical behaviour in aquifers of Punjab, Pakistan
ترجمه فارسی عنوان
ارزیابی پتانسیل آلودگی آرسنیک، تنوع و رفتار هیدروژئوشیمیایی در آبخوانهای پنجاب پاکستان
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
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, 10â¯Î¼gâ¯Lâ1) and Pakistan-EPA (50â¯Î¼gâ¯Lâ1), respectively. Arsenite (As(III)) and arsenate (As(V)) spanned 0-80% and 20-100% of total As (1.2-206â¯Î¼gâ¯Lâ1), respectively. The mean As content (5.2â¯Î¼gâ¯Lâ1) of shallow wells at 9-40â¯m depth did not exceed the WHO safe limit, representing a safe aquifer zone for pumping of groundwater compared to deeper wells at 41-90â¯m (51â¯Î¼gâ¯Lâ1) and >90â¯m (23â¯Î¼gâ¯Lâ1) 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 study provides insights to tackle emerging As threat to the communities in Punjab, Pakistan, as well as help develop suitable management/mitigation strategies - based on the baseline knowledge of As levels/species and factors governing As contamination in the study area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 199, May 2018, Pages 737-746
Journal: Chemosphere - Volume 199, May 2018, Pages 737-746
نویسندگان
Muhammad Bilal Shakoor, Irshad Bibi, Nabeel Khan Niazi, Muhammad Shahid, Muhammad Farrakh Nawaz, Abida Farooqi, Ravi Naidu, Mohammad Mahmudur Rahman, Ghulam Murtaza, Andreas Lüttge,