中文摘要：

系统研究了过氧化氢（H2O2）影响铁负载膨润土吸附铀（Ⅵ）的效果与机理.通过改变pH、H2O2浓度、初始U（Ⅵ）浓度,探讨了加入H2O2的条件下铁负载膨润土对U（Ⅵ）的吸附过程,并采用扫描电镜（SEM）、红外光谱（FT-IR）等对吸附U（Ⅵ）前后的铁负载膨润土进行了表征.试验结果表明,溶液初始pH为3～6时,H2O2能使铁负载膨润土对U（Ⅵ）的吸附率达到98%以上;H2O2浓度对反应平衡时的吸附性能影响不大;随着U（Ⅵ）浓度的增大,H2O2对铁负载膨润土吸附U（Ⅵ）的促进作用也随之增强,U（Ⅵ）浓度为0.64 mmol/L时,吸附量从1.74 mmol/g（铁负载膨润土）增至3.13 mmol/g（H2O2和铁负载膨润土的复合体系）.

英文摘要：

The effect of hydrogen peroxide （ H2O2 ） on the adsorption onto Fe-immobilized bentonite was investigated at various conditions of initial solution pH, H2O2 concentration and U （VI） concentration by batch technique, Fe-immobilized before and after adsorption were characterized by Scanning Electron Microscope （SEM） and Fourier Transform Infra- red Spectra （FT-IR）. The results indicated that the adsorption is strongly dependent on pH, H2O2 enhanced the U（VI） adsorption to greater than 98% at pH 3 -6. The adsorption was affected a little by the concentration of H2O2 when the reaction reached to equilibrium. The facil- itation of adsorption by H2O2 increased as uranium concentration increases, when the initial U （VI） concentration was 0.64 mmol/L, the saturation amount for U （VI） adsorbed by Fe-immobilized ben- tonite were 1.74 mmol/g （Fe-immobilized bentonite） and 3.13 mmol/g（ composite system of H2O2 and Fe-immobilized bentonite） respectively.