重金属铅离子在钛酸纳米管/水界面的吸附研究  

Effect of Environmental Conditions on the Adsorption of Pb(Ⅱ) at the Titanate Nanotubes/Water Interface

作　　者：徐志法[1] 金阳[1] 盛国栋[1] 金城安[1] 

机构地区：[1]绍兴文理学院化学化工学院化学系,浙江绍兴312000

出　　处：《广东化工》2013年第10期27-28,共2页Guangdong Chemical Industry

摘　　要：文章研究了钛酸纳米管对水体中Pb(Ⅱ)离子的吸附,考察了时间、pH、离子强度等常见环境因素对吸附的影响。发现,钛酸纳米管对Pb(Ⅱ)的吸附在很短的时间里可达平衡。体系pH强烈影响着钛酸纳米管对Pb(Ⅱ)的吸附。在体系pH较小时,吸附受离子强度影响,外层络合是主要机理;而在体系pH较大时,吸附不受离子强度影响,内层络合是主要机理。这些结果对环境中重金属离子的处理具有一定参考价值。In this work,adsorption of Pb（Ⅱ） from aqueous solution onto（titanate nanotubes,TNTs） was investigated by using batch technique under various environmental conditions such as contact time,pH,ionic strength.The results showed that the adsorption of Pb（Ⅱ） onto TNTs was very fast and equilibrium can be obtained in a short time.The results also indicated that the adsorption of Pb（Ⅱ） onto TNTs was strongly dependent on pH.At low pH value,the adsorption of Pb（Ⅱ） onto TNTs was affected by ionic strength and outer-sphere surface complexation is the main mechanism,whereas the adsorption of Pb（Ⅱ） onto TNTs was not affected by ionic strength and inner-sphere surface complexation is the main mechanism at high pH value.The results might be important for assessing the potential of practical application of TNTs in heavy metal pollution management.

关 键 词：钛酸纳米管 吸附 铅离子 

分 类 号：O614.411[理学—无机化学]