壳聚糖和乙二胺改性Fe_3O_4磁性纳米粒子的制备及其对酸性品红的吸附特性  

Modification of the nano Fe_3O_4 using chitosan and ethylenediamine and its adsorption behavior for acid magenta

作　　者：杨武[1] 潘薇[1] 郭昊[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2016年第3期78-83,共6页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(29875018)

摘　　要：采用SiO_2包覆Fe_3O_4磁性纳米粒子,然后以戊二醛为交联剂使其与壳聚糖交联固化,得到了磁性壳聚糖复合纳米粒子(CMS),再经乙二胺改性制得乙二胺改性的磁性壳聚糖复合纳米粒子吸附剂(EDCMS),并将其用于对酸性品红溶液的吸附研究.考察了pH、吸附剂用量、吸附时间、初始浓度对吸附行为的影响.结果表明,吸附剂对酸性品红脱色率达98.04%以上,最大吸附量为284mg·g^(-1),吸附过程符合准二级速率方程和Freundlich等温模型.A composite absorbent （EDCMS ） based on ethylenediamine modified magnetic chitosan nanoparticles is prepared through coating magnetic Fe3 O4 nanoparticles with SiO2 , chitosan and ethylenediamine ,and then used to adsorb acid magenta . The effects of the experimental conditions such as pH ,amount of absorbents ,contact time and initial concentration on the adsorption properties as well as thermodynamics and dynamics are also investigated . The results show that the removal rate of acid magenta is above 98.04% and the maximum adsorption amount is 284 mg-g -1 . The adsorption process obeys the pseudo‐second rate equation and the Freundlich isothermal adsorption model .

关 键 词：Fe3 O4 纳米粒子 磁性吸附材料 壳聚糖 酸性品红 脱色 

分 类 号：O647.32[理学—物理化学]