摘要
利用简单一步交联法成功制备高度蓬松的吸附剂PEI@Co_3O_4。通过SEM、FT-IR、XRD对该复合材料的结构进行了表征。在六价铬水溶液中探讨了其吸附性能,并对吸附影响因素进行探究,如初始溶液pH,吸附剂用量,接触时间,初始Cr(Ⅵ)浓度和共存离子等。结果表明,在室温下,PEI@Co_3O_4对Cr(Ⅵ)的最大吸附量高达691.88 mg/g。吸附过程符合伪二阶动力学和Freundlich等温模型。PEI@Co_3O_4对Cr(Ⅵ)具有优越的吸附性能。
The highly fluffy adsorbent PEI@ Co_3O_4 was successfully prepared by simple one-step cross-linking. The structure of the composites was characterized by SEM,FT-IR and XRD. Its adsorption properties were investigated in hexavalent chromium aqueous solution,and the influencing factors were investigated,such as the initial solution pH,the amount of adsorbent,the contact time,the initial Cr( Ⅵ) concentration,the coexisting ions and so on. The results show that the maximum adsorption capacity of PEI@ Co_3O_4 to Cr( Ⅵ) is 691. 88 mg/g at room temperature.The adsorption process is consistent with pseudo-second-order kinetics and Freundlich isothermal model. It is found that PEI@ Co_3O_4 has an excellent adsorption properties for Cr( Ⅵ).
出处
《西华师范大学学报（自然科学版）》
2017年第3期274-281,333,共9页
Journal of China West Normal University(Natural Sciences)
基金
四川省应用基础项目基金(2015JY0042)
四川省教育厅重点项目基金(15ZA0147)
西华师范大学博士科研启动基金(14E015)
关键词
聚乙烯亚胺
四氧化三钴
吸附
动力学
polyethyleneimine
cobalt tetroxide
adsorption
kinetics
