淀粉接枝丙烯酰胺吸附铜离子性能研究  

Adsorption capacity of starch-grafted polyacrylamide for Cu(Ⅱ)

作　　者：韦晓燕[1,2] 谭军[1,2] 欧阳玉霞[1,2] 范举红 刘锐 

机构地区：[1]嘉兴学院南湖学院化学与纺织工程系,浙江嘉兴314001 [2]嘉兴学院生物与化学工程学院,浙江嘉兴314001 [3]浙江清华长三角研究院生态环境研究所,浙江嘉兴314006

出　　处：《工业水处理》2014年第2期15-18,共4页Industrial Water Treatment

基　　金：国家863高技术发展计划重大项目(2012AA06A304);浙江省公益性技术应用研究计划项目(2012C31028)

摘　　要：以玉米淀粉为原料,经接枝共聚反应合成了淀粉接枝丙烯酰胺。对产物进行了红外光谱、元素分析和极限黏度表征。考察了pH、接触时间、Cu2+初始浓度对产物吸附Cu2+的影响,并进行了吸附动力学、等温吸附研究。结果表明:在pH=6时,淀粉接枝丙烯酰胺对水溶液中的Cu2+有良好的吸附效果;吸附过程符合Freundlich等温式,且与拟二级动力学方程吻合,化学反应为吸附控制步骤。Starch-grafted polyacrylamide has been synthesized via grafting polymerization using corn starch as raw material. The product has been characterized by infrared spectroscopy,elemental analysis and intrinsic viscosity. The effects of pH, adsorption time and initial Cu2＋ concentration on the adsorption capacity of the product for Cu （Ⅱ ） are investigated. Moreover,the adsorption dynamics and isothermal adsorption are studied. The results show that when the pH is 6, the adsorption capacity of the product for Cu （ Ⅱ ） from aqueous solution is very good. The adsorption process is in accordance with Freundlich isotherm, and coincides with pseudo second order dynamics equation. Its chemical reaction is in adsorption controlling step.

关 键 词：淀粉接枝丙烯酰胺 等温吸附 吸附动力学 铜离子 

分 类 号：TS231[轻工技术与工程—粮食、油脂及植物蛋白工程] X703.5[轻工技术与工程—食品科学与工程]