کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8851710 | 1618771 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrogeochemical and isotopic evaluation of groundwater with elevated arsenic in alkaline aquifers in Eastern Punjab, Pakistan
ترجمه فارسی عنوان
ارزیابی هیدروژئوشیمیایی و ایزوتوپهای آبهای زیرزمینی با آرسنیک بالا در آبخوانهای قلیایی در شرق پنجاب پاکستان
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کلمات کلیدی
آرسنیک، آب های زیرزمینی، آب سطحی، ایزوتوپهای پایدار، تبخیر، بسیج،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
Geochemical investigation was carried out for delineating factors responsible for the mobilization of arsenic (As) from aquifer material into the groundwater. Four sites along Ravi River, (Samada, Sarai Chimba, Kot Maiga and Chah Fatehwala), were selected based on the blanket survey. Groundwater-rock interaction and evaporation were the key phenomena controlling groundwater chemistry, as shown by the hydrogeochemical data. Groundwater was predominantly Na-Cl type, with other principle facies being Na-HCO3, Na-Ca-HCO3 and Ca-Mg-Cl. The groundwater As concentration ranged between below detection level (2â¯Î¼g/L) to 548â¯Î¼g/L with 59% samples exceeding the World Health Organization (WHO) guidelines for As in drinking water (10â¯Î¼g/L) and 31% having higher concentrations than the National Environmental Quality Standard (NEQS, 50â¯Î¼g/L). Moderate to high concentrations of SO4â2 averaged at 244â¯mg/L and moderate NO3â concentrations averaged at 8â¯mg/L, together with alkaline pH (7.3-8.8) and high Eh values (113-402â¯mV) suggest partial oxidizing nature of the aquifers. The values for δ 18O and δ 2H in groundwater varied between â9.14 and â5.51â°, and â56.57 to â39.5â° respectively, and suggests meteoric origin of the groundwater with some evaporative loss. This effect could be partly responsible for elevated levels of pH and salinity in groundwater. Based on geochemical and isotopic composition of groundwater, desorption of As from metal surfaces under alkaline environment might be the factor causing As enrichment in study area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 200, June 2018, Pages 576-586
Journal: Chemosphere - Volume 200, June 2018, Pages 576-586
نویسندگان
Nisbah Mushtaq, Ayesha Younas, Azhar Mashiatullah, Tariq Javed, Arslan Ahmad, Abida Farooqi,