利用两亲聚合物聚乙烯吡咯烷酮(PVP)对碳纳米管(CNTs)进行非共价修饰,考察修饰后CNTs对水中污染物亚甲基蓝的吸附.研究体系pH、离子强度、PVP加入量等各种因素对修饰后CNTs吸附亚甲基蓝的影响.结果表明,在pH=8时,PVP浓度为12mg/L时修饰后CNTs对亚甲基蓝的吸附效果最好.离子强度对吸附容量影响很小.吸附过程符合准二级动力学模型和Langmuir、Freundlich、D-R吸附等温式.由D-R等温式求得非共价修饰CNTs对亚甲基蓝平均活化能为10.08kJ/mol.PVP对CNTs的非共价修饰能够有效促进CNTs在水中的溶解和分散,增强吸附作用.
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