中文摘要：

对羧甲基纤维素（CMC）进行改性，并将其用于吸附废水中的铀．研究结果表明：在温度为70℃-80℃、单体质量浓度为30％-35％、羧甲基纤维素：丙烯酸（质量比）为10：2．5、反应时间为3．5-4h条件下，CMC改性效果最好；在改性CMC质量浓度为O．10g／L，温度为25℃，pH值为5．0，反应时间60min的条件下，对废水中铀去除率达到了97．1％；改性CMC对溶液中U（VI）的吸附过程符合Freundlich方程，其吸附动力学数据符合准一级方程（R^2=0．9618），表明改性CMC的吸附主要是表面吸附；热力学研究表明，改性CMC对铀的吸附吉布斯自由能（△G^0）〈0，而焓变（△H^0）〉0，吸附过程是自发的吸热反应、以物理吸附为主的过程．

英文摘要：

The acrylic acid（AA）-modified carboxymethyl cellulose（CMC） resin was prepared and was explored to adsorb uranium（VI） ions fi＇om aqueous solution in a batch system. The experimental results showed that on the condition of reaction tempomture 70-80℃, CIVIC 30% -35% （w/w）, CMC to AA （w/w） of 10：2.5 and reaction time 3.5-4h, the modification effect was the best. High removal efficient of U（VI） was obtained 97.1% at temperature of 25℃, pH value of 5.0, dosage of modified CMC resin 0.1 g/L and contact time of 60 min. It was found that the adsorption process was best described by Freundiich model and pseudo-first-order kinetic model （R^2=0.9618）, indicating that the adsorption was mainly on the surface of the resin. Thermodynamics parameters of negative value of △G^0 and positive value of △H^0 revealed the spontaneity and endothermic nature of the adsorption. The adsorption was primarily due to physical adsorption.