کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4769254 1425533 2017 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Understanding the sorption behavior of trivalent lanthanides on amide functionalized multi walled carbon nanotubes
ترجمه فارسی عنوان
درک رفتار جذب لانتانیدها سه لایه بر روی نانولوله های کربنی چند کرومیک کارکرد آمید
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
An attempt was made to understand the sorption behavior of trivalent lanthanides (La, Nd, Gd, Er and Lu) onto amide functionalized multiwalled carbon nanotubes (CNT-DHA). The Kd values were found to follow the trend: Lu3 + > La3 + ~ Gd3 + > Nd3 + > Er3 +, which was attributed to a combination of the water exchange mechanism and the hydration number of trivalent lanthanides in solution. Analysis of sorption isotherm via Langmuir, Temkin, Freundlich and Dubinin-Radushkevich isotherm revealed the sorption process was physisorption and cooperative. Based on the linear regression analysis, the sorption processes were found to proceed via Freundlich isotherms. The sorption process followed pseudo second order kinetics with the trend in rate constants Nd3 + > Er3 + > La3 + > Lu3 + > Gd3 +. CNT-DHA was found to be radiolytically stable with a slight decrease in sorption performance. Quantitative back extraction of Ln3 + from loaded CNT-DHA was effectively done by EDTA solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 171, August 2017, Pages 8-15
نویسندگان
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