کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8911161 | 1638092 | 2017 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Geochemical fractionation and ecological risks assessment of benthic sediment-bound heavy metals from coastal ecosystems off the Equatorial Atlantic Ocean
ترجمه فارسی عنوان
تجزیه و تحلیل ژئوشیمیایی و ارزیابی خطرات زیست محیطی فلزات سنگین متصل به رسوبات بنتون از اکوسیستم های ساحلی خارج از اقیانوس اطلس استوایی
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کلمات کلیدی
خاصیت، آلودگی فلزات سنگین، ارزیابی ریسک زیست محیطی، شاخص های آلودگی، توزیع فضایی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
چکیده انگلیسی
This study determines the pollution, fractionation, and ecological risks of sediment-bound heavy metals from coastal ecosystems off the Equatorial Atlantic Ocean. Contamination Factor (CF), pollution load index (PLI), and geoaccumulation index (Igeo) were used to assess the extent of the heavy metal pollution, while the potential ecological risk was evaluated using the risks assessment code (RAC) and HÃ¥kanson potential ecological risk. The analysis revealed concentrations (mg/g, dw) of the cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), and lead (Pb) in sediments for wet and dry seasons vary from 4.40-5.08, 14.80-21.09, 35.03-44.8, 2.14-2.28, and 172.24-196.39, respectively. The results also showed that the metal fractionation percentages in the residual, oxidizable, and reducible fractions are the most significant, while the exchangeable and carbonate bound trace metals are relatively low. The RAC values indicate no risk for Cd and Ni and low risk for other metals at all the studied sites during both seasons. Potential ecological risk analysis of the heavy metal concentrations indicates that Cd had high individual potential ecological risk, while the other metals have low risk at all investigated sites. The multi-elemental potential ecological risk indices (R1) indicate high ecological risk in all the ecosystems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Sediment Research - Volume 32, Issue 3, September 2017, Pages 410-420
Journal: International Journal of Sediment Research - Volume 32, Issue 3, September 2017, Pages 410-420
نویسندگان
Nsikak U. Benson, Essien D. Udosen, Joseph P. Essien, Winifred U. Anake, Adebusayo E. Adedapo, Oyeronke A. Akintokun, Omowunmi H. Fred-Ahmadu, Abass A. Olajire,