کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5410420 | 1506552 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetics and thermodynamics of Eu(III) adsorption onto synthetic monoclinic pyrrhotite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Kinetics and thermodynamics of Eu(III) adsorption onto synthetic monoclinic pyrrhotite Kinetics and thermodynamics of Eu(III) adsorption onto synthetic monoclinic pyrrhotite](/preview/png/5410420.png)
چکیده انگلیسی
The adsorption of Eu(III) from aqueous solutions onto monoclinic pyrrhotite (M-Pyr) was studied by batch experiments under various experimental conditions. M-Pyr was synthesized and characterized by XRD, FT-IR, SEM and potentiometric titration. The macroscopic results showed that the adsorption of Eu(III) on M-Pyr was independent of ionic strength, indicating that inner-sphere surface complexation predominated their adsorption. The kinetic adsorption process was well described by pseudo-second-order model with high correlation coefficient (R2Â >Â 0.999). The adsorption isotherms indicated that the adsorption of Eu(III) on M-Pyr fitted by Langmuir model was better than Freundlich model. The maximum adsorption capacity of Eu(III) on M-Pyr calculated from Langmuir model was 10.03Â mg/g at pHÂ 5.0 and 293Â K. The thermodynamic parameters suggested that the adsorption of Eu(III) on M-Pyr was a spontaneous and endothermic processes. According to XPS analysis, the adsorption of Eu(III) on M-Pyr was mainly dominated by ion exchange and inner-sphere surface complexation at low pH and high pH conditions, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 218, June 2016, Pages 565-570
Journal: Journal of Molecular Liquids - Volume 218, June 2016, Pages 565-570
نویسندگان
Yuke Zhu, Haibo Liu, Tianhu Chen, Bin Xu, Ping Li,