摘要
以羧甲基纤维素钠(CMC)为共聚骨架,丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸钠(AMPS)和2-丙烯酰胺基十四烷基磺酸钠(Na AMC14S)为接枝单体,过硫酸铵(APS)为引发剂,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,采用水溶液聚合法合成了一种新型CMC-g-poly(AM-co-AMPS-co-Na AMC14S)高吸水树脂,并添加氢氧化钠(NaOH)与酰胺基发生水解反应,使得酰胺基(—CONH2)变成羧酸根(—COO-)。通过单因素优选法筛选出树脂对Cu^2+、Pb^2+的最佳吸附条件。当pH为4、吸附时间为12 h、树脂质量分数为0.01%时,CMC-g-poly高吸水树脂对Cu2+、Pb2+去除率可分别达到85.89%、82.09%,展示出极好的吸附性能。吸附动力学表明,该吸附过程受化学吸附控制。重金属离子可以有效地被CMC-g-poly树脂吸附。
Using sodium carboxymethyl cellulose(CMC)as copolymer skeleton,acrylamide(AM),2-acrylamide-2-methylpropanesulfonate sodium(AMPS)and sodium 2-acrylamide-tetradecyl sulfonate(Na AMC14 S)as grafting monomers,ammonium persulfate(APS)as initiator,and N,N’-methylene bi-acrylamide(MBA)as crosslinking agent,a new type of super absorbent polymer CMC-g-poly(AM-co-AMPS-co-Na AMC14 S)is synthesized through aqueous solution polymerization method.Sodium hydroxide is added to react with amide group so that the amide group(—CONH2)in the polymer becomes carboxylic acid(—COO-).The optimal conditions for adsorption of Cu2+and Pb2+by the obtained super absorbent polymer are selected by means of single factor optimization method.The results show that the removal rates of Cu^2+and Pb^2+by CMC-g-poly(AM-co-AMPS-co-Na AMC14 S)can reach 85.89%and 82.09%,respectively when both Cu2+and Pb2+concentrations are 200 ppm,pH is 4,adsorption time is 12 h,and the dosage of the polymer is 0.01 wt%.Adsorption kinetics indicates that the adsorption process is controlled by chemisorption.Heavy metal ions can be effectively adsorbed by CMC-g-poly(AM-co-AMPS-co-Na AMC14 S).
作者
邱海燕
王舰苇
薛松松
鲁莹纯
金李
徐波
QIU Hai-yan;WANG Jian-wei;XUE Song-song;LU Ying-chun;JIN Li;XU Bo(College of Chemistry&Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China;Jilin Appraisal Center for Environment&Engineering,Changchun 130000,China;Ningbo ZRCC Lyondell Chemical Co.,Ltd.,Ningbo 315000,China)
出处
《现代化工》
CAS
CSCD
北大核心
2020年第3期176-180,185,共6页
Modern Chemical Industry
基金
典型工业聚集区废水处理稳定达标技术集成研发与示范(18ZDYF0051).
关键词
高吸水树脂
羧甲基纤维素钠
吸附动力学
重金属
super absorbent polymer
carboxymethylcellulose sodium
adsorption kinetics
heavy metal
