交联壳聚糖吸附处理低浓度含铀废水王学刚.pdf

SeriesNo. 411 金 属 矿 山 总第411期 September 2010 METAL M INE 2010年第 9期 交联壳聚糖吸附处理低浓度含铀废水* 王学刚 王光辉 谢志英 (东华理工大学 ) (CTS), , (CCTS), , pH , pH= 3~ 5, 10 mg, 50mg/ L, 160 m in, 98. 0% , Langmuir, 50mg/L, 87. 4%, 98. 0%, 交联壳聚糖 吸附 含铀废水 Adsorp tion of U ran ium in L ow Concen tration U ranium-bearing W astew ater on to C ross-linked Ch itosan WangXuegang W ang Guanghui Xie Zhiying (E ast Ch ina Institu te of T echnology ) A bstrac t Taking the natural polymer compounds of chitosan as rawmaterials, the insoluble cross-linked chitosanwas synthesized by the reaction of chitosan w ith epichlorohydrin under alkaline conditions as the adsorbent of uranium-bearing wastewater. The influence factors on adsorption of uranium were investigated in details, such as pH value, adsorbent dos- age, uranium initial concentration, particle size and equilibrium of adsorption and the adsorption kinetics law ofuranium on cross-linked chitosan were described. The results show thatunder the conditions ofpH= 3~ 5, adding 10mg cross-linked chitosan, the adsorption equilibrium for the 50 mg/L uranium can be obtained after 160m in of adsorption, and the adsorp- tion removal efficiency of cross-linked chitosan for uranium was over 98. 0%. The adsorption law ofuranium on cross-linked chitosan followed the Langmuir model very well and the pseudo second-order kineticsmodelwas used to describe the ad- sorption process. W hen the initial concentrations of uranium is50mg/L, the adsorption removalefficiency of chitosan and