کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10110870 | 1619996 | 2005 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrochemistry and mercury cycling in a High Arctic watershed
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Mass budgets for total mercury, major ions and nutrients were calculated for Amituk Lake, located on Cornwallis Island, Nunavut, Canada. Total mercury in two distinct snowpacks averaged 1.25 and 4.21 ng Lâ1; the discharge-weighted concentration of influent streams averaged 0.76 ng Lâ1. The recent and pre-industrial HgT fluxes in atmospheric deposition to the catchment were estimated to be 0.57 and 0.23 μg mâ2 but through retention within the catchment and/or re-volatilization from the melting snowpack, these decreased by 69% in the lake inflow. The spring freshet was the prime conduit for transporting HgT into Amituk Lake. Because of limited mixing of surface runoff with the lake water column during snowmelt, 59% of the HgT input was directly discharged through the outflow, 16% entered the lake water column where concentrations increased from 0.23 to 0.33 ng Lâ1 from June to August and 25% was deposited to the bottom sediments producing a sediment HgT flux of 3.1 μg mâ2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 342, Issues 1â3, 15 April 2005, Pages 199-221
Journal: Science of The Total Environment - Volume 342, Issues 1â3, 15 April 2005, Pages 199-221
نویسندگان
Raymond G. Semkin, Greg Mierle, Roy J. Neureuther,