多壁碳纳米管对三丁基锡的吸附行为及其细胞毒性效应研究

The adsorption behavior of multiple-wall carbon nanotubes on tributyltin and their combined cytotoxicity

研究了多壁碳纳米管对三丁基锡(TBT)吸附行为,主要考察了溶液pH和盐度的影响作用.同时比较了无机锡、四丁基锡(TeBT)与三丁基锡在多壁碳纳米管上吸附行为的差异,并探讨了在多壁碳纳米管存在下三丁基锡的细胞毒性作用.研究结果表明多壁碳纳米管对丁基锡具有较强的吸附能力,吸附平衡时间短,能很快达到吸附平衡.溶液pH能影响这种吸附作用.三丁基锡在多壁碳纳米管上的吸附符合Langmuir和Freundlich吸附等温式,主要为疏水作用.在与多壁碳纳米管的共存体系中三丁基锡的细胞毒性效应有所削弱,这可能与多壁碳纳米管对三丁基锡的吸附作用有关.

The adsorption behavior of multiple-wall carbon nanotubes （MWNTs） to tributyhin （TBT） was investigated. Several factors including pH and salinity were studied. Based on comparison of the adsorption behaviors of inorganic tin and tetrabutyhin （TeBT） with that of TBT, the adsorption mechanism of MWNTs to organotin compounds is discussed. The results showed strong adsorption ability of MWNTs to TBT. The adsorption equilibrium was rapidly reached. The adsorption behavior of MWNTs to TBT was consistent with both Langmuir and Freundlich adsorption isotherms, and was clearly affected by the pH value. The hydrophobic adsorption of MWNTs to TBT might weaken the cytotoxicity of TBT.