Sorption of uranium(VI) from aqueous solutions by akaganeite

被引：130

作者：

Yusan, Sabriye ^{[1
]}

Akyil, Sema ^{[1
]}

机构：

[1] Ege Univ, Inst Nucl Sci, TR-35100 Izmir, Turkey

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 160卷 / 2-3期

关键词：

Uranium(VI); Sorption; Iron oxides; Adsorption isotherms; Thermodynamic constants;

D O I：

10.1016/j.jhazmat.2008.03.009

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Removal of U(VI) ions from aqueous solutions was investigated using synthetic akaganeite-type nanocrystals. Nanocrystals of iron oxyhydroxides were synthesized with two different methods and then compared their adsorption capacities. Akaganeite (beta-FeOOH) was synthesized in the laboratory by precipitation from aqueous solution of Fe(III) chloride and different precipitating agents. The relative importance of test parameters like solution pH, contact time, temperature and concentration of adsorbate on adsorption performance of akaganeite for U(VI) ion were studied. Typical adsorption isotherms (Langmuir, Freundlich, Dubinin-Raduskevich) were determined for the mechanism of sorption process. Also the thermodynamic constants (Delta H degrees, Delta S degrees and Delta G degrees) were calculated. The product materials were examined by powder X-ray diffraction for crystalline phase identification and scanning electron microscope (SEM). (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：388 / 395

页数：8

共 31 条

[1] Sorption characteristics of uranium onto composite ion exchangers [J].