کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5757747 | 1412734 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamics of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of Cochin estuary, India
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
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چکیده انگلیسی
Polycyclic aromatic hydrocarbons (PAHs) showed significant seasonal dynamics in surface sediments of a tropical ecosystem (Cochin estuary, south west coast of India). Concentrations ranged from 304 to 5874 nggâ 1 in pre-monsoon, 493 to 14,149 nggâ 1 in monsoon, and 194 to 10,691 nggâ 1 in post-monsoon. The estuary was moderately contaminated with low molecular weight PAH fractions, which increased rapidly during the monsoon season indicating land/river runoff as the major transport pathway. The dominance of 2-3 ring fractions in the PAH indicated petrogenic and low temperature combustion processes as major sources, while the very low levels of 5-6 ring components indicated low contribution from pyrolytic sources. Low molecular weight fractions were higher in concentration than the Effective Range-Median (ERM) levels, whereas high molecular weight PAHs were lower than the Effective Range-Low values (ERL). Calculated carcinogenic toxicity equivalents (TEQ) values ranged from 1 to 971 ng gâ 1 in the surface sediments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 114, Issue 2, 30 January 2017, Pages 1081-1087
Journal: Marine Pollution Bulletin - Volume 114, Issue 2, 30 January 2017, Pages 1081-1087
نویسندگان
Ramzi A., Habeeb Rahman K., Gireeshkumar T.R., Balachandran K.K., Jacob Chacko, Chandramohanakumar N.,