کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5352326 | 1388149 | 2013 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Removal of uranium(VI) from aqueous solutions by CMK-3 and its polymer composite
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Removal of uranium(VI) from aqueous solutions by CMK-3 and its polymer composite Removal of uranium(VI) from aqueous solutions by CMK-3 and its polymer composite](/preview/png/5352326.png)
چکیده انگلیسی
The ability of PANI-CMK-3 composite (PANI-CMK-3) by in site polymerizing aniline onto the surface of mesoporous carbon (CMK-3) has been explored for the removal and recovery of uranium from aqueous solutions. The results of FTIR, SEM, TG/DTA and N2 adsorption-desorption demonstrated that aniline was successfully polymerized onto the inside and outside surface of CMK-3 rather than occupying the mesopore. The U(VI) sorption on PANI-CMK-3 was well fitted to the Langmuir adsorption isothermal and pseudo-second kinetics models. The monolayer maximum capacity of PANI-CMK-3 was improved from 50.12 mg gâ1 of CMK-3 to 118.30 mg gâ1 at 298 K due to the imine and amine groups in PANI. The thermodynamic parameters (ÎH, ÎS and ÎG) showed the U(VI) adsorption on CMK-3-PANI and CMK-3 were all endothermic and spontaneous in nature. Selective adsorption experiments (co-existing ions, Na+, Mg2+, Zn2+, Mn2+, Ni2+ and Sr2+) show that the selectivity of CMK-3 was enhanced after aniline polymerization. Moreover, the U(VI) adsorbed on the surface of PANI-CMK-3 can be eluated by 1.0 mol Lâ1 HCl solution with high desorption rate of 98%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 285, Part B, 15 November 2013, Pages 258-266
Journal: Applied Surface Science - Volume 285, Part B, 15 November 2013, Pages 258-266
نویسندگان
Yunhai Liu, Qin Li, Xiaohong Cao, Youqun Wang, Xiaohui Jiang, Min Li, Ming Hua, Zhibin Zhang,