کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9465992 1315763 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mercury distribution in Douro estuary (Portugal)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
پیش نمایش صفحه اول مقاله
Mercury distribution in Douro estuary (Portugal)
چکیده انگلیسی
Determinations of dissolved reactive and total dissolved mercury, particulate and sedimentary mercury, dissolved organic carbon (DOC), particulate organic carbon (POC) and suspended particulate matter (SPM) have been made in the estuary of river Douro, in northern Portugal. The estuary was stratified by salinity along most of its length, it had low concentrations of SPM, typically <20 mg dm−3, and concentrations of DOC in the range <1.0-1.8 mg dm−3. The surface waters had a maximum dissolved concentration of reactive mercury of about 10 ng dm−3, whereas for the more saline bottom waters it was about 65 ng dm−3. The surface waters had maximum concentrations of total suspended particulate mercury of ∼7 μg g−1 and the bottom waters were always <1 μg g−1. Concentrations of mercury in sediments was low and in the range from 0.06 to 0.18 μg g−1. The transport of mercury in surface waters was mainly associated with organic-rich particulate matter, while in bottom waters the dissolved phase transport of mercury is more important. Lower particulate organic matter, formation of chlorocomplexes in more saline waters and eventually the presence of colloids appear to explain the difference of mercury partitioning in Douro estuarine waters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 50, Issue 11, November 2005, Pages 1218-1222
نویسندگان
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