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
从金月 1黄超群 1贾伟娜 1刘冰 1王璇 1于良民1
作者信息
- 1. 中国海洋大学三亚海洋研究院,海南 三亚 572024
- 折叠
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.
Abstract
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-π interaction,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Key words
N-hydroxymethyl acrylamide/dimethyl diallyl ammonium chloride/hydrogel/methyl orange/adsorption引用本文复制引用
出版年
2024
NETL
NSTL
万方数据