碳纳米管对阿特拉津的吸附/解吸特性  

Adsorption and desorption behavior of atrazine on Carbon Nanotubes

作　　者：庄晓艳[1,2] 石宝友[2] 芦家娟[2] 晏晓敏[2] 高羽飞[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085

出　　处：《环境科学学报》2009年第6期1245-1251,共7页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.20777081,20537020)~~

摘　　要：采用批量实验研究了不同溶液条件下阿特拉津(AT)在单壁碳纳米管(SWNT)和多壁碳纳米管(MWNT)上的吸附/解吸行为.实验结果显示,离子强度对AT在SWNT和MWNT上的吸附没有显著影响,但随着pH值的增大,AT在2种碳纳米材料上的吸附量显著增加;这表明,AT在溶液中的存在状态是吸附的主要影响因素.在本实验的研究条件下,AT从SWNT和MWNT上的解吸行为不存在明显的滞后效应.碳纳米管对AT较高的吸附容量和吸附的可逆性表明,碳纳米管的大规模应用将可能带来一定的环境和健康风险.In this paper, the adsorption and desorption of atrazine（AT）on single-waned carbon nanotubes （SWNT） and multi-walled carbon nanotubes （MWNT） in aqueous solution were studied in batch reactors. The results showed that the ionic strength had no significant influence on the adsorption of AT onto SWNT and MWNT. With the increase of pH, the adsorption of AT onto the two nanomaterials increased greatly, which indicated that the speciation of atrazine was the dominant factor controlling the adsorption capacity. The adsorption-desorption curves revealed that no significant desorption hysteresis existed under the conditions of this study. High adsorption capacity and adsorption reversibility of atrazine on carbon nanotubes （CNTs） imply that CNTs could result in health and environmental risks when applied on a large scale.

关 键 词：单壁碳纳米管 多壁碳纳米管 阿特拉津 吸附 解吸 

分 类 号：X131[环境科学与工程—环境科学]