【摘要】 通过序批试验研究3种碳系材料对三氯生和萘普生的吸附性能,同时考察p H和离子强度对吸附效果的影响。研究结果表明:3种碳系材料的吸附能力从大至小的活性炭纤维、颗粒活性炭、多壁碳纳米管。拟二级动力学模型更适合描述3种碳基材料对三氯生和萘普生的吸附过程。Langmuir模型能够更准确地拟合三氯生和萘普生在3种碳系材料表面的吸附。3种碳系材料的吸附性能随着p H升高而降低。由于静电作用和盐析效应,活性炭纤维和颗粒活性炭的吸附量随着离子强度的增强而增大;而团聚作用则使多壁碳纳米管对三氯生的吸附量降低。更多还原

【Abstract】 The adsorption of triclosan and naproxen onto three carbon-based materials was studied through batch experiments, meanwhile the effect of p H and ionic strength was investigated. The results show that adsorption abitity from large to small of three carbon-based materials is activated carbon fiber, granular activated carbon, and multi-walled carbon nanotubes. Pseudo-second-order kinetic model is more suitable to describe the adsorption of triclosan and naproxen onto three carbon-based materials. Langmuir isotherm may more accurately fit the adsorption of triclosan and naproxen onto three carbon-based materials. The adsorption capacity of three carbon-based materials increases with the increase of solution p H. Because of the electrostatic interaction and salting-out effect, the adsorption capacity of activated carbon fiber and granular activated carbon increases with increasing the ionic strength. However, the aggregation of multi-walled carbon nanotubes makes its adsorption capacity of triclosan decrease.更多还原