阳离子型聚N-羟甲基丙烯酰胺水凝胶的制备及其对废水中甲基橙的吸附性能研究  

Preparation of cationic poly(N⁃hydroxymethyl acrylamide)hydrogel and study on its adsorption performance to methyl orange in wastewater

作　　者：从金月 黄超群 贾伟娜 刘冰[1] 王璇[1] 于良民[1] CONG Jin-yue;HUANG Chao-qun;JIA Wei-na;LIU Bing;WANG Xuan;YU Liang-min(Sanya Oceanographic Institution,Ocean University of China,Sanya 572024,China)

机构地区：[1]中国海洋大学三亚海洋研究院,海南三亚572024

出　　处：《现代化工》2024年第S01期257-263,共7页Modern Chemical Industry

摘　　要：采用水溶液聚合法制备了阳离子型聚N-羟甲基丙烯酰胺水凝胶(CPNMA),并对其吸附废水中甲基橙(MO)的性能进行探究。利用SEM、FT-IR、TG及XPS对CPNMA进行表征。通过吸附动力学和吸附等温线模型拟合发现,在25℃下CPNMA对MO的吸附行为更符合拟二级动力学和Langmuir等温吸附模型,吸附平衡时间为960 min,理论最大吸附量为371.6 mg/g。分析了吸附温度和溶液pH对吸附效果的影响,结果表明,在吸附温度为35℃及溶液pH=6时CPNMA可以呈现出最佳的吸附效果。综合分析,CPNMA的吸附机理包括氢键、静电作用、范德华力、n-π相互作用、表面吸附和孔隙填充。Cationic poly(N⁃hydroxymethyl acrylamide)hydrogel(CPNMA)is prepared through aqueous solution polymerization method,and its adsorption performance to methyl orange in wastewater is explored.SEM,FT⁃IR,TG,and XPS are employed to characterize CPNMA.It is found through fitting model that the adsorption behavior of CPNMA to methyl orange at 25℃is more in line with pseudo second order kinetics and Langmuir isotherm adsorption models.The adsorption equilibrium time is 960 min,and the theoretical maximum adsorption capacity is 371.6 mg·g^(-1).In addition,the impacts of adsorption temperature and solution pH on adsorption effect are analyzed.Results show that CPNMA can exhibit the best adsorption effect at an adsorption temperature of 35℃and a solution pH of 6.All in all,the adsorption mechanism of CPNMA includes hydrogen bonding,electrostatic interactions,Van der Waals force,n⁃πinteraction,surface adsorption,and pore filling.

关 键 词：N-羟甲基丙烯酰胺 二甲基二烯丙基氯化铵 水凝胶 甲基橙 吸附 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]