کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8872123 1622710 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bioavailability and geochemical speciation of phosphorus in surface sediments of the Southern Caspian Sea
ترجمه فارسی عنوان
قابلیت دسترسی بیولوژیک و ژئوشیمیایی فسفر در رسوبات سطح دریای خزر جنوبی
کلمات کلیدی
قابلیت دسترسی بیولوژیک، فسفر، رسوب سطحی، دریای خزر،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
چکیده انگلیسی
The purpose of this study was to quantify phosphorus bioavailability and various forms of this element in surface sediments of the southern Caspian Sea. To do, sediment samples were collected from different depths in autumn 2015 using a Van Veen Grab. Phosphorus forms were recognized by a sequential extraction procedure (SEDEX). Results revealed that the range of total phosphorus (TP) was between 431 ppm and 594 ppm with a mean value of 535.25 ± 45.05 ppm. Organic phosphorus (OP) ranged from 62 to 99 ppm and contributed 14.85 ± 2.21% of total phosphorus in average. The contents of loosely phosphorus, iron-bound phosphorus, authigenic phosphorus and detrital phosphorus varied 35-55 ppm, 50-94 ppm, 125-189 ppm and 152-217 ppm, respectively. Generally, inorganic phosphorus (IP) was between 365 and 522 ppm which comprised 81.9-88.53% of total phosphorus. Findings showed levels of different phosphorus forms in a descending order: detrital P > Authigenic P > Organic P > Fe-P > Loosely P. Bioavailable phosphorus concentration was between 153 ppm and 240 ppm and consisted 37.21 ± 3% of total phosphorus. Based on molar ratio of TOC/OP, organic matter obtained from the studied stations suggested a terrestrial origin.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 126, January 2018, Pages 51-57
نویسندگان
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