中文摘要：

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3.5～4 h条件下对CMC进行改性,接枝率可达68%以上。以改性前后的CMC为吸附剂,对模拟酸法地浸含铀废水进行了对比吸附实验研究。结果表明：改性CMC对铀吸附效果最佳的实验条件为：改性CMC质量浓度为0.10 g/L,温度为25℃,pH为5.0,吸附时间100 min,此时铀去除率达到了97.1%,比CMC改性后对铀的吸附率平均提高了近21%。影响吸附效果程度由强到弱的顺序为：改性CMC投加量、pH、吸附时间、温度。

英文摘要：

The adsorption of uranium（VI） onto modified CMC was studied in this experiment.The result showed that the adsorption effect of modified CMC polymer was good,the grafting rate was above 68%,when temperature was 70~80 ℃,monomers quality concentration was 30%~35%,mass ratio was 10∶ 2.5,contact time was 3.5~4 h.The optimum experimental conditions were CMC quality concentration of 0.10 g/L,temperature of 25 ℃,pH=5.0,contact time of 100 min,under the optimal conditions,the removal rate of U（VI） was 97.1%,which increased about 21% on an average.Orthogenesis test is also showed that factors affecting adsorption from strong to weak were CMC dose,pH,contact time and temperature.