印迹改性磁性交联壳聚糖吸附铅离子的性能研究  

Study on the Adsorption of Lead Ions onto Imprinting Modified Magnetic Crosslinking Chitosan

作　　者：冯利凡[1] 程爱华[1] 畅飞[1] 刘艳妮[1] 

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054

出　　处：《非金属矿》2013年第2期75-78,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51278418)

摘　　要：利用先印迹和后印迹方法制备2种印迹改性磁性交联壳聚糖,并考察了其对水中铅离子的吸附性能。结果表明,在25℃、pH值为5、反应时间为240min时,先印迹的印迹改性磁性交联壳聚糖(Pb-TMCS)吸附性能优于后印迹的印迹改性磁性交联壳聚糖(TMCS-Pb),二者对铅离子的饱和吸附量分别达到45.38 mg/g和36.45 mg/g,随温度的升高,吸附量降低,说明该吸附过程是放热过程,吸附等温线符合Langmuir吸附等温式,吸附过程符合伪二级动力学反应模型。Two imprinting modified magnetic crosslinking chitosan were prepared by imprinting lead ions before and after modifying magnetic crosslinking chitosan. Adsorption capacity of lead ions adsorption onto adsorbent were studied. Results showed that under the conditions of pH value of 5, adsorption temperature of 25℃, and reaction time of 240 min, compared with TMCS-Pb （36.45 mg/g）, Pb-TMCS shows higher adsorption capacity （45.38 mg/g）, Adsorption capacity decreased with increase of temperature indicated that adsorption was an exothermic process, Isotherm adsorption equilibrium fit Langmuir model, and adsorption process kinetics could be described by pseudo second-order reaction.

关 键 词：印迹改性磁性交联壳聚糖 吸附 铅离子 废水处理 

分 类 号：X703[环境科学与工程—环境工程]