氧化单壁碳纳米角对环丙沙星的吸附动力学及热力学研究
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摘要
本文研究讨论氧化单壁碳纳米角(ox SWNHs)对环丙沙星的吸附行为,考察其吸附动力学和热力学.结果表明,ox SWNHs对环丙沙星的吸附量为347 mg/g,且其吸附动力学行为符合伪二级模型. ox SWNHs对环丙沙星的吸附量随着温度的升高而增加,使用Langmuir方程及Freundlich方程能较好的拟合吸附过程,但Freundlich拟合效果更加.所得热力学参数表明,ox SWNHs对环丙沙星的吸附是一个吸热熵增的自发过程.
We discussed the adsorption of ciprofloxacin by oxidized single-wall carbon nanohorns( oxSWNHs). Sorption kinetics,sorption thermodynamics and effect of p H were investigated. The results showed that the adsorption capacity of the antibiotics is 347 mg/g,and the adsorption kinetics of the antibiotics can be represented by a pseudo-second order model better. The adsorption capacity increased with the temperature. The Langmuir isotherm and Freundilch isotherm can fit the adsorption process well and Freundlich isotherm fits the results better. The thermodynamic parameters showed that the adsorption of the antibiotics on oxSWNHs was a spontaneous,endothermic and entroy enhancing process.
We discussed the adsorption of ciprofloxacin by oxidized single-wall carbon nanohorns( oxSWNHs). Sorption kinetics,sorption thermodynamics and effect of p H were investigated. The results showed that the adsorption capacity of the antibiotics is 347 mg/g,and the adsorption kinetics of the antibiotics can be represented by a pseudo-second order model better. The adsorption capacity increased with the temperature. The Langmuir isotherm and Freundilch isotherm can fit the adsorption process well and Freundlich isotherm fits the results better. The thermodynamic parameters showed that the adsorption of the antibiotics on oxSWNHs was a spontaneous,endothermic and entroy enhancing process.
引文
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