Removal of Cd~（2＋） from water by modified multiwall carbon nanotubers
In order to increase the adsorption amount of Cd2＋ in water,the multiwall carbon nanotubers were treated by mixed acid,and the result was characterized by IR.The treated MWNTs were used to adsorb the Cd2＋ in simulating water.The effect of adsorption time,pH,the amount of MWNTs,the concentration of Cd2＋ and interfering ion on the adsorption of Cd2＋ were discussed.The results indicated that optimal conditions of Cd2＋ adsorption on treated MWNTs were time of 1.5 h and pH of 5.3.The amount of Cd2＋ adsorption increased with increase of the amount of MWNTs,and effect of adsorption was depressed by existence of cation,the adsorption data fit the langmiur model and its linearized form well.Results of a desorption study showed that Cd2＋ adsorbed onto MWCNTs could be easily desorbed at pH 2.The mechanism of Cd2＋ adsorption was also discussed.
国家科技期刊平台
NSTL
万方数据
维普
