کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5757739 1412734 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geochemical speciation, bioavailability and source identification of selected metals in surface sediments of the Southern Caspian Sea
ترجمه فارسی عنوان
مشخصات ژئوشیمیایی، قابلیت دسترسی زیستی و شناسایی منبع فلزات انتخاب شده در رسوبات سطح دریای خزر جنوبی
کلمات کلیدی
خاصیت، فلزات سنگین، ترکیبات اکسید، رسوب سطحی، دریای خزر،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
چکیده انگلیسی
Geochemical speciation of As, Cd, Co, Cr, Cu, Ni, Pb, V and Zn were determined in the surface sediments of the southern Caspian Sea. A five-step sequential extraction technique was used to determine the chemical forms of metals. Mean concentrations (ppm) of heavy metals were (mean ± S.D.) As: 9.94 ± 1.71, Cd: 0.87 ± 0.23, Co: 14.85 ± 2.80, Cr: 72.29 ± 19.48, Cu: 18.91 ± 4.48, Ni: 32.87 ± 5.25, Pb: 12.48 ± 3.22, V: 86.07 ± 20.71 and Zn: 66.85 ± 10.11. Among the metals, Cu, As, Pb and Zn exhibited relatively higher mobility, while Cd, Co, Cr, Ni and V were found mainly in the residual fractions. Cu and As showed the highest percentages in the exchangeable phase while Co and Cr had the lowest percentages in the phase. The Risk Assessment Code (RAC) values indicated that As, Cu and V had medium risk at some sampling sites. According to pollution load index (PLI), sediments from some sampling sites were polluted.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 114, Issue 2, 30 January 2017, Pages 1014-1023
نویسندگان
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