离子液体改性微晶纤维素的制备及其对铜离子的吸附  

Preparation of ionic liquid functionalized microcrystalline cellulose and its application of adsorption properties of copper ion

作　　者：杨苗秀 刘子迪 许亮 张素风[1] 钱立伟[1] 陈昊楠 YANG Miao-xiu;LIU Zi-di;XU-Liang;ZHANG Su-feng;QIAN Li-wei;CHEN Hao-nan(Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper,Key Laboratory of Auxiliary Chemistry&Technology for Chemical Industry,Ministry of Education,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science&Technology,Xi'an 710021,China)

机构地区：[1]陕西科技大学陕西省造纸技术及特种纸品开发重点实验室教育部轻化工助剂化学与技术重点实验室轻化工程国家级实验教学示范中心

出　　处：《陕西科技大学学报》2019年第5期13-19,共7页Journal of Shaanxi University of Science & Technology

基　　金：陕西省教育厅重点实验室科研计划项目(17JS016);陕西省大学生创新创业训练计划项目(201810057)

摘　　要：重金属污染废水对生活环境和人类生命安全会产生较大危害,本研究以微晶纤维素为原料,通过酯化反应与烷基化反应,将咪唑离子液体官能团接枝到纤维素骨架上,制备了生物质基吸附剂,并将其用于水相中铜离子吸附.结果表明,微晶纤维素经改性后对铜离子有较好的选择性吸附性能,在pH值为4,吸附剂用量为0.05g,接触时间为24h时,对初始浓度为900mg/L的铜离子的最大吸附量为138.3mg/g.通过选择性吸附实验表明离子液体改性微晶纤维素对铜离子有着较好的吸附能力.Due to the deep influence to human living environment caused by wastewater containing heavy metals,in this work,a bioadsorbent based on cellulose was prepared by using imidazolium ionic liquid modification via esterification and alkylation reaction.The experimental results showed that the functionalized microcrystalline cellulose has good adsorption properties selectively to copper ion.When the pH value is 4,the dosage of adsorbent is 0.05 g and the contact time is 24 h,the maximum adsorption capacity of 138.3 mg/g for copper ion with initial concentration of 900 mg/L can be achieved.In addition,the selective adsorption experiments confirmed that the ionic liquid functionalized microcrystalline cellulose achieved a surprised selective adsorption capacity towards copper ion.

关 键 词：离子液体 微晶纤维素 铜离子 

分 类 号：X703[环境科学与工程—环境工程]