硅溶胶改性羧甲基纤维素-聚丙烯酸对铅(Ⅱ)的吸附研究  

Studies on the Improvement of Adsorptive Power of Carboxymethylcellulose Graft Acrylic Acid with Silicic Sol for Pb(Ⅱ)

作　　者：徐浩龙[1,2] 

机构地区：[1]渭南师范学院化学与生命科学学院,陕西渭南714000 [2]陕西省多河流湿地生态环境重点实验室,陕西渭南714000

出　　处：《河南科学》2012年第7期857-860,共4页Henan Science

基　　金：陕西省教育厅专项科研项目(2010JK544);渭南师范学院专项科研项目(07YKZ031;10YKF011)

摘　　要：以过硫酸铵为引发剂,N,N′-亚甲基双丙烯酰胺为交联剂,采用自由基聚合法使羧甲基纤维素与丙烯酸进行接枝共聚,硅溶胶改性后,应用于Pb(Ⅱ)的吸附研究.考察了原料配比p、H、溶液浓度、吸附时间对吸附性能的影响.结果表明:硅酸钠质量分数为6%、pH为6时,复合材料表现出最佳吸附性能;吸附时间为120 min时,最大吸附率为99.11%,吸附容量为9.92 mg/g.Grafted copolymerization of acrylic acid on carboxymethylcellulose,using ammonium peroxydisulfate as the intiator and N,N′-methylenebisacrylamide as the cross-linking agent and modified by silicic sol,was prepared from carboxymethylcellulose,acrylic acid and by the method of copolymerization and cross-linking,and applied to Pb（Ⅱ） absorbefacient.The results showed that the maximum of the adsorption rate was 99.11% and 9.92 mg/g for absorption value,when pH=6 and the mass fraction of sodium silicate was 6%,adsorbent period was 120 minutes and concentration of Pb（Ⅱ） was 100 mg/L.

关 键 词：羧甲基纤维素 硅溶胶 铅(Ⅱ) 吸附 

分 类 号：O612.4[理学—无机化学] X703[理学—化学]