近来，人们分别研究了碳纳米管(CNTs)-重金属、CNTs-抗生素和CNTs-有机质等单一体系中的吸附行为，并取得一定进展。但是，单一的纯水体系不能充分反映多种污染物共存的真实环境。迄今为止，对水环境中广泛存在的有机质和重金属对抗生素在CNTs上吸附的影响少有研究。本项目拟研究不同pH时，有机质和重金属对抗生素在功能化多壁碳纳米管（MWCNTs）上吸附的影响，并应用多种光谱和波谱技术，如傅里叶变换红外光谱、X-射线吸收光谱、X-射线粉末衍射、核磁共振、紫外-可见光谱等技术，观测MWCNTs分散性及表面性质变化、污染物在溶液中的形态、污染物在MWCNTs上的吸附位点，在分子水平阐明有机质和重金属影响抗生素吸附的机理。该研究对于了解共存污染物在MWCNTs上的作用机制具有科学意义，对于了解抗生素和MWCNTs的环境行为及环境健康风险评价具有现实意义。

Most current research is focused on the sorption of metals, antibiotics or organic matter by carbon nanotubes (CNTs) in isolation in single-solute system. A single-solute system may not adequately represent the majority of mixed contaminant water systems commonly encountered in the water environment, where complex mixtures of contaminants containing organic matter, heavy metals and antibiocss may coexist at many contaminated water bodies. To the best of our knowledge, the question as to whether and how organic matter and heavy metals affect the sorption of antibiotics on CNTs has not been adequately addressed...Therefore, this proposal will apply dialysis equilibrium system to investigate the role of organic matter and heavy metals on sorption of antibiotics by functionalized multiwalled carbon nanotubes (MWCNTs) at various pHs. Special attention would be given on which interaction mechanism dominates the sorption of an antibiotic as affected by a certain organic matter and metals. Therefore, Fourier transform infrared spectroscopic, and X-ray absorption spectroscopic, and X-ray diffraction spectroscopic, and nuclear magnetic resonance, and ultraviolet-visible spectroscopic studies will be applied subsequently to provide insight into the organic matter-metals-antibiotics interactions in aqueous solutions and on the surface of functionalized MWCNTs.The results will shed light on the mechanism between complex mixtures of contaminants and MWCNTs.The resulsts will also provide new insight into the environmental behaviors of antibiotis and MWCNTs and ecological risk assessment.