氧化单壁碳纳米角对金霉素的吸附动力学及热力学研究

On Adsorption Kinetics and Thermodynamics of Oxidized Single-wall Carbon Nanohorns for Aureomycin

研究氧化单壁碳纳米角(ox SWNHs)对金霉素的吸附行为,考察其吸附动力学和热力学。结果表明,ox SWNHs是一种优于活性炭的新型碳纳米材料,对金霉素的吸附量为397mg/g,且其吸附动力学行为符合伪二级模型。ox SWNHs对金霉素的吸附量随着温度的升高而增加,使用Langmuir方程及Freundlich方程均能较好地拟合吸附过程,但Freundlich拟合效果更加。所得热力学参数表明,ox SWNHs对金霉素的吸附是一个吸热熵增的自发过程。

The adsorption of aureomycin by oxidized single-wall carbon nanohorns(ox SWNHs) was studied to investigate its adsorption kinetics and thermodynamics. The results showed that the antibiotics was a kind of new carbon nano-material better than activated carbon with the adsorption capacity of 397 mg/g, and its adsorption kinetics could be represented by a pseudo-secondary model. Its adsorption capacity increases as the temperature goes up. Both Langmuir isotherm and Freundilch isotherm can fit the adsorption process well, but the latter fits the results better. The thermodynamic parameters showed that the adsorption of the antibiotics on ox SWNHs was a spontaneous endothermic process in which entropy kept increasing.