摘要
羧甲基纤维素(CMC)水溶液中,通过自由基共聚制备半-互穿网络(IPN)羧甲基纤维素(CMC)/聚(丙烯酰胺-共-甲基丙烯酸钠)(poly(AAm-co-NMR))水凝胶。研究CMC含量对半-IPN水凝胶溶胀率及对甲基紫的吸附性能影响。IPN-0.25、IPN-0.50和IPN-1.00对甲基紫的平衡吸附容量分别为111.0、182.3和237.6 mg/g。分别采用拟一级、拟二级和粒内扩散模型拟合实验数据,结果表明,拟二级动力学模型最符合该体系,其相关系数R2最高,说明水凝胶对甲基紫的吸附主要为化学吸附。
Semi-interpenetrating network（ IPN） hydrogels carboxymethyl cellulose（ CMC） / poly（ acrylamide-co-sodium methacrylate） were synthesized by free radical copolymerization of acrylamide（ AAm） and sodium methacrylate（ NMR） in aqueous solution of carboxymethyl cellulose. The effects of CMC content on swelling ratio of semi-IPN hydrogels and adsorption of methyl violet were investigated. The equilibrium adsorption capacity of IPN-0. 25,IPN-0. 50 and IPN-1. 00 for methyl violet adsorption were 111. 0,182. 3 and 237. 6 mg / g,respectively. The pseudo-first-order,pseudo-second-order and intra-particle diffusion equations were adopted to examine the mechanism of the adsorption process. The adsorption process is more accord with pseudo-second-order kinetic model,which indicates that chemical adsorption is dominant.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第11期5243-5248,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51406141)
福建省教育厅JK类项目(JK2012055)
南平市科技局项目(N2012Z06(6))
武夷学院基金项目(JB05194)
