کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6408659 1629466 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sorption and desorption of fluorene on five tropical soils from different climes
ترجمه فارسی عنوان
جذب و جذب فلورن در پنج خاک گرمسیری از مناطق مختلف
کلمات کلیدی
فلوئورن، جذب، خاک، منطقه زراعی محیطی در مناطق جنوب صحرای آفریقا،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
The main processes controlling soil-polycyclic aromatic hydrocarbon interaction is sorption-desorption as influenced by the soil physicochemical conditions. Sorption-desorption phenomena can influence translocation, persistence and bioavailability. Hence, laboratory batch experiments were undertaken to investigate the sorption characteristics of fluorene on five tropical soils from varying tropical agro-ecological zones having different physicochemical properties. Fluorene concentrations used for the study ranged from 20 to 100 μg/L, and results showed that fluorene sorption equilibria were attained usually within 24 h. Increase in pH had a negative effect on fluorene sorption. Fluorene sorption was concentration dependent and exothermic. The sorbed fluorene molecules were distributed between surface adsorption sites and phases in soil. Sorption was controlled by weak hydrophobic forces, such as the π-π interactions and Van der Waal's forces. Desorption hysteresis were most pronounced in soils with high organic matter contents than lower ones. The sorption was characterized as multiple reaction phenomena composed of several linear and non-linear isotherms. The physicochemical conditions of the soil must be understood in order to predict the fate and bioavailability of fluorene in soil.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volumes 239–240, February 2015, Pages 179-185
نویسندگان
, , ,