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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.
The adsorption / desorption behaviors of atrazine (AT) on single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MWNTs) under different solution conditions were studied by batch experiments.The experimental results show that the ionic strength The adsorption of SWNT and MWNT had no significant effect, but with the increase of pH, the adsorption capacity of AT on the two kinds of carbon nanomaterials significantly increased; this indicates that the presence of AT in solution is the main factor of adsorption. Under the experimental conditions, there is no obvious hysteresis effect on the desorption behavior of AT from SWNT and MWNT.The higher adsorption capacity and reversible adsorption of AT on carbon nanotubes indicate that the large-scale application of carbon nanotubes will probably Bring some environmental and health risks.