多壁碳纳米管对水中敌草隆的吸附性能研究  

PERFORMANCE OF MULTIWALLED CARBON NANOTUBES IN ADSORBING DIURON FROM AQUEOUS SOLUTION

作　　者：胡栩豪[1] 高乃云[1] 归谈纯[1] 邓靖[1] 张东[2] 卢宁[2] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,200092 [2]城市水资源开发利用南方国家工程研究中心,上海200082

出　　处：《水处理技术》2012年第11期25-29,共5页Technology of Water Treatment

基　　金：国家科技重大专项资助(2008ZX07421-002;2008ZX07421-004);住房和城乡建设部研究项目(2009-K7-4)

摘　　要：针对多壁碳纳米管(MWCNTs)对敌草隆的吸附特性进行了研究,并考察了接触时间、温度和初始pH对敌草隆吸附效果的影响。碳纳米管对敌草隆的吸附在1 h内可达到表观平衡,且其吸附动力学曲线符合准二级动力学方程。Polanyi-Manes方程可以准确的描述多壁碳纳米管对敌草隆的吸附行为。通过热力学研究可知,多壁碳纳米管对敌草隆的吸附过程是自发的放热过程。多壁碳纳米管的氧化处理不但可以增加碳纳米管的比表面积和孔容,而且可以在其表面产生多种亲水的含氧官能团。多壁碳纳米管对敌草隆的吸附受pH的影响,在中性和碱性条件下表现出较强的吸附能力。The performance of diuron adsorption by multiwalled carbon nanotubes（MWCNTs） was investigated in aqueous solutionsto evaluate the effects of contact time,temperature and initial pH on the adsorption of diuron by multiwalled carbon nanotubes.The adsorption of diuron by multiwalled carbon nanotubes reached apparent equilibrium with in 1 h.The pseudo second order adsorption kinetic model well fit the experimental data.The adsorption of diuron by multiwalled carbon nanotubes was well represented by the Polanyi-Manesisotherm.The multiwalled carbon nanotubes adsorption of diuron was a spontaneous and exothermic process.The oxidation of as-prepared multiwalled carbon nanotubes can not onlyincrease the pore volume and the surface area,but also introduce more oxygen-containing functional groups onto the surfaces of MWCNTs,which led to more removal of diuron in this study.pH was a significant effect on diuronad sorption by MWCNTs,and more adsorption was observed under neutral and basic conditions.

关 键 词：敌草隆 多壁碳纳米管 吸附 PH Polanyi-Manes方程 

分 类 号：TQ424[化学工程] X703.1[环境科学与工程—环境工程]