کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5757583 1622720 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geochemical partitioning of lead in biogenic carbonate sediments in a coral reef depositional environment
ترجمه فارسی عنوان
پراکندگی ژئوشیمیایی سرب در رسوبات کربنات بیوژنیک در محیط رسوبی مرجانی
کلمات کلیدی
ژئوشیمی رسوب، پارتیشن بندی عنصر ردیابی، استخراج متوالی، خلیج مکزیک، وراکروز،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
چکیده انگلیسی
The fate of trace elements in reef depositional environments has not been extensively investigated. The aim of this study was to determine the partitioning of Pb in sediments of the Veracruz Reef System, and its relation to local environmental sources. Lead was determined in four geochemical fractions: exchangeable (3.8 ± 0.4 μg g− 1), carbonate (57.0 ± 13.6 μg g− 1), organic matter (2.0 ± 0.9 μg g− 1), and mineral (17.5 ± 5.4 μg g− 1). For the mineral fraction, lead concentrations were higher in those reefs influenced by river discharge or by long-distance transport of terrigenous sediments. The bioavailable concentration of lead (range: 21.9-85.6 μg g− 1) indicates that the Veracruz Reef System is a moderately polluted area. As expected, the carbonate fraction contained the highest proportion of Pb (70%), and because the reef framework is largely made up of by biogenic carbonate sediments, hence, it is therefore the most important repository of Pb in coral reef depositional environments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 116, Issues 1–2, 15 March 2017, Pages 71-79
نویسندگان
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