双氰胺修饰环氧纤维素对甲基橙溶液的吸附研究  

The Adsorption of Methyl Orange on Dicyandiamide Modified Epoxy Cellulose

作　　者：张敏[1] 胡霄毅[1] 闵英豪 周艳梅[1] 乔涵[1] 刘震雷 马同森[1] 

机构地区：[1]河南大学化学化工学院环境与分析科学研究所,河南开封475004

出　　处：《河南大学学报（自然科学版）》2014年第3期292-298,共7页Journal of Henan University:Natural Science

基　　金：河南省国际科技合作项目(124300510012);三聚氰胺的食品安全检测技术(112102310360);河南省基础研究项目(122300410260);河南省教育厅自然科学研究项目(2011A610005);2012年河南大学大学生创新实验计划

摘　　要：通过甲基丙烯酸缩水甘油酯(GMA)对纤维素进行化学改性得到环氧纤维素,在环氧纤维素上引入功能基团双氰胺,合成了双氰胺改性的环氧纤维素吸附剂(CMS),并通过FT-IR,TGA/DTA,SEM对其结构进行了表征.将CMS用于甲基橙的吸附研究,对吸附时间、温度、pH、初始浓度进行考察,确定了最佳实验条件.对实验数据进行吸附等温线拟合,结果表明,吸附过程符合Langmuir等温吸附模型,最大理论吸附容量为213.22mg·g-1;与实际实验数据相吻合;同时吸附过程符合准二级动力学方程.Epoxy cellulose was synthesized by modified glycidyl methacrylate（GMA）on cellulose fiber,then dicyandiamide was wed as functional group grafting onto the surface of epoxy cellulose to get the adsorbent CMS,which was characterized by FT-IR,TGA/DTA,SEM.The adsorbent was used to remove methyl orange,the influence factors in adsorption time, temperature,pH,initial concentration were also investigated.The experiment results show that the adsorption process fitted the Langmuir isotherm,the adsorption capacity of methyl orange could reach 213.22mg爛g-1 in theory in conformity with the actual experimental data.The adsorption process fits the pseudo-second-order kinetics model.

关 键 词：纤维素 双氰胺 甲基橙 吸附 

分 类 号：O636.1[理学—高分子化学]