摘要
利用分子印迹技术,以壳聚糖(CS)为功能单体,Cu2+为印迹离子,通过稀氨水固化、环氧氯丙烷交联、盐酸洗脱Cu2+,制得了Cu2+印迹交联壳聚糖微球(Cu2+-ICM)。采用FTIR、XRD和FESEM对产品进行了表征,并测定了微球的骨架密度、含水量和交联度。结果表明:交联改性可使微球具有多孔结构和良好的结构稳定性,能够很好地降低CS的酸溶性,提高微球对Cu2+的吸附性能。通过正交实验L9(34)得到Cu2+-ICM的最优制备条件为:CS 1.5 g,环氧氯丙烷2.5 mL,80℃下交联3.0 h,制得的微球对Cu2+吸附量为67.80 mg/g。在单组分体系中考察了微球对Cu2+的吸附性能。结果表明:当微球投加量为50 mg,Cu2+初始质量浓度为338.7 mg/L,pH=5.0时,吸附量为72.80 mg/g。
By using the molecular imprinting technique, Cu2+ imprinted cross-linked chitosan microspheres(Cu2+-ICM) with chitosan(CS) as functional monomer, Cu2+ as template ion were prepared by curing with dilute ammonia, crosslinking with epoxy chloropropane and elution with hydrochloric acid. The products were characterized by FTIR, XRD and FESEM. Their physical properties such as skeleton density, water content and crosslinking degree were measured. The results showed that the crosslinking modification made the microspheres have porous structure and good structural stability, reduced the acid solubility of CS very well, and improved the adsorption properties of microspheres on Cu2+. An orthogonal test L9(34) was used to investigate the optimum preparation conditions of Cu2+-ICM. It was found that CS 1.5 g, epoxy chloropropane 2.5 m L, crosslinking temperature 80 ℃, crosslinking time 3.0 h were optimal. Under the optimum conditions, the adsorption capacity of the prepared Cu2+-ICM to Cu2+ was 67.80 mg/g. The adsorption properties of microspheres to Cu2+ were also studied in single component system. The results demonstrated that when the dosage of microspheres was 50 mg, initial concentration of Cu2+ was 338.7 mg/L,and pH value was 5.0, the Cu2+ adsorption capacity of microspheres was 72.80 mg/g.
作者
傅明连
黄秋云
叶玉娟
陈彰旭
FU Ming-lian;HUANG Qiu-yun;YE Yu-juan;CHEN Zhang-xu(Fujian Provincial Key Laboratory of Ecology-toxicological Effects& Control for Emerging Contaminants,College ofEnvironmental and Biological Engineering,Putian University,Putian 351100,Fujian,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2019年第6期1228-1234,共7页
Fine Chemicals
基金
福建省自然科学基金资助项目(2017J01710,2015J01644)
国家级大学生创新创业训练计划项目(201811498011)
福建省大学生创新创业训练计划项目(201811498033)~~
关键词
印迹
壳聚糖微球
交联
铜离子
吸附量
水处理技术
imprinting
chitosan microspheres
cross-linked
copper ion
adsorption capacity
water treatment technology
