Removal of uranium(VI) from aqueous solutions by carboxyl-rich hydrothermal carbon spheres through low-temperature heat treatment in air
Removal of uranium(VI) from aqueous solutions by carboxyl-rich hydrothermal carbon spheres through low-temperature heat treatment in air
复制标题
富羧基热液碳球在空气中低温热处理去除水溶液中的铀(VI)
DOI：
10.1007/s10967-013-2441-y
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发表时间：
2013-02
影响因子：
1.6
通讯作者：
Liu, Yun-hai
中科院分区：
文献类型：
--
作者：
Zhang, Zhi-bin;Nie, Wen-bin;Li, Qin;Xiong, Guo-xuan;Cao, Xiao-hong;Liu, Yun-hai
Carboxyl-rich hydrothermal carbon spheres were prepared by simply heating pristine hydrothermal carbon spheres (HCSs) at lower temperature in air, and the textural properties were characterized using Boehm titrations, scanning electron microscopy, Fourier transform infrared spectrometer (FT-IR) and elemental-analysis. The result of Boehm titrations indicated that the content of carboxyl groups on HCSs increased significantly from 0.53 to 3.81 mmol/g after heat-treatment at 300 °C, which was also confirmed by FT-IR and EA qualitatively. The ability of heat-treated HCSs has been explored for the removal and recovery of uranium from aqueous solutions, and the influences of different experimental parameters, such as heat-treatment temperature, contact time and ionic strength, on adsorption were investigated. The U(VI) sorption capacity of HCSs increased from 55.0 to 179.95 mg/g after heat-treatment at 300 °C for 5 h. Selective adsorption studies showed that the heat-treated HCSs could selectively remove U(VI), and the selectivity coefficients were improved after heat-treatment in the presence of co-existing ions, Na(I), Ni(II), Sr(II), Mn(II), Mg(II) and Zn(II). The adsorbent HCSs could be effectively regenerated by 0.05 mol/L HCl solution for the removal and recovery of U(VI). Complete removal (99.0 %) of U(VI) from 1.0 L industry wastewater containing 15.0 mg U(VI) ions was possible with 5.0 g heat-treated HCSs. In addition, a reaction mechanism for newly generating carboxyl groups on pristine HCSs surface during heat-treatment process and uranyl ion interaction with carboxyl-rich hydrothermal carbon spheres were also supposed.
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DOI：
10.1002/chin.201016219
发表时间：
2010-04
期刊：
ChemInform
影响因子：
--
作者：
M. Titirici;M. Antonietti
通讯作者：
M. Titirici;M. Antonietti
影响因子：
8.9
作者：
A. Schierz;H. Zänker
通讯作者：
A. Schierz;H. Zänker
影响因子：
16.6
作者：
Sun, XM;Li, YD
通讯作者：
Li, YD
影响因子：
13.6
作者：
Afkhami, Abbas;Madrakian, Tayyebeh;Karimi, Ziba
通讯作者：
Karimi, Ziba
影响因子：
8.7
作者：
T. Anirudhan;L. Divya;P. Suchithra
通讯作者：
T. Anirudhan;L. Divya;P. Suchithra