Amidoxime-Grafted Hydrothermal Carbon Microspheres for Highly Selective Separation of Uranium

被引：28

作者：

Geng, Junxia ^{[1
]}

Ma, Lijian ^{[1
]}

Wang, Hang ^{[1
]}

Liu, Jun ^{[1
]}

Bai, Chiyao ^{[1
]}

Song, Qiang ^{[1
]}

Li, Juan ^{[1
]}

Hou, Min ^{[1
]}

Li, Shoujian ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem, Key Lab Radiat Phys & Technol, Minist Educ, Chengdu 610064, Peoples R China

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2012年 / 12卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Uranium(VI); Hydrothermal Carbon; Amidoxime; Sorption; Selective Separation; SOLID-PHASE EXTRACTION; SILICA-GEL; NANOPOROUS SILICA; ADSORPTION; PRECONCENTRATION; REMOVAL; RECOVERY; SORPTION; IONS; CARBONIZATION;

D O I：

10.1166/jnn.2012.6518

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new amidoxime-functionalized carbonaceous sorbent has been successfully prepared using hydrothermal carbon microsphere as solid matrix and diaminomaleonitrile as precursor of amidoxime ligand. Effects of pH, sorbent dosage, contact time, temperature, initial U(VI) concentration and ionic strength on U(VI) sorption were investigated in detail through batch experiments. Sorption of U(VI) on the sorbent was pH-dependent. Sorption equilibrium was reached in 5 min. Distinctively, higher temperature was beneficial to the sorption of U(VI) in the range of 15-60 degrees C, high ionic strength up to 1 mol L-1 NaNO3 had almost no effect on the sorption, and the maximum U(VI) sorption capacity of 466 mg g(-1) was observed under the conditions tested. The as-synthesized sorbent exhibited a high selectivity for U(VI) over other 12 competing ions coexisting in a simulated nuclear industrial effluent sample and the U(VI) sorption amount reached up to 1.09 mmol g(-1), accounting for about 52% of the total sorption amount.

引用

页码：7354 / 7363

页数：10

共 54 条

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