کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5410118 | 1506551 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetics and thermodynamics of Eu(III) and U(VI) adsorption onto palygorskite
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The adsorption of Eu(III) and U(VI) from aqueous solutions by palygorskite was studied by batch experiments under various experimental conditions. The palygorskite was characterized by TEM, XRD, FT-IR and potentiometric titration. The adsorption kinetics of Eu(III) and U(VI) on palygorskite were both well described by pseudo-second-order model with high correlation coefficient. The adsorption of Eu(III) and U(VI) by palygorskite decreased with increasing ionic strength, indicating outer-sphere surface complexation predominated. The adsorption isotherms indicated that the adsorption of Eu(III) and U(VI) by palygorskite fitted by Freundlich models were better than Langmuir models. The maximum adsorption capacities of Eu(III) and U(VI) on palygorskite calculated from Langmuir model were 24.26 and 46.75 mg·gâ 1 at pH 4.0 and 333 K, respectively. The thermodynamic parameters suggested that the adsorption of Eu(III) and U(VI) on palygorskite was a spontaneous and endothermic process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 219, July 2016, Pages 272-278
Journal: Journal of Molecular Liquids - Volume 219, July 2016, Pages 272-278
نویسندگان
Yuke Zhu, Tianhu Chen, Haibo Liu, Bin Xu, Jingjing Xie,