环境工程学报2012，Vol.6Issue(8)：2705-2709,5.
胺化改性米糠对水中Cr（Ⅵ）的吸附
Adsorption of Cr（ VI ） in aqueous solutions using aminated rice bran
摘要
Abstract
Aminated rice bran （ARB） was prepared by introducing amido through reaction of rice bran ac- tivated by epoxy chloropropane and ethylenediamine. The adsorption performance of Cr（VI） from aqueous solu- tion by ARB was investigated in detail. The results showed that ARB possesses strong adsorption ability for Cr （ VI）, the adsorption equilibrium can be achieved in 3.5 h and the adsorption kinetics is well described by pseu- do-first-order model. The adsorption capacities increase along with the increase of Cr（VI） concentration, the in- teraction between Cr（VI） and ARB is monolayer adsorption process, and the saturated adsorption capacities reach a maximum of 36.1 mg/g. It was found that pH and temperature had a great influence on the adsorption process, the optimal pH was found to be 3 and the sorption process was more favorable at higher temperatures. Thermodynamic parameters were also evaluated and the positive value of AH and negative value of AG indicated that adsorption of Cr（VI） on ARB is an endothermic process and soontaneous in nature.关键词
胺化米糠/Cr（Ⅵ）/吸附性能Key words
aminated rice bran/Cr(VI)/adsorption performance分类
化学化工引用本文复制引用
周艳,罗娅君,李娟,吴文华,吴晓莉..胺化改性米糠对水中Cr（Ⅵ）的吸附[J].环境工程学报,2012,6(8):2705-2709,5.基金项目
绵阳师范学院校级科研项目 （）
