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首页> 外文期刊>American journal of applied sciences >Kinetics and Adsorption Isotherm of Ibuprofen onto Grafted β-CD/Chitosan Polymer
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Kinetics and Adsorption Isotherm of Ibuprofen onto Grafted β-CD/Chitosan Polymer

机译：布洛芬在接枝的β-CD/壳聚糖聚合物上的动力学和吸附等温线

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摘要

The adsorption of the Ibuprofen (Ibu) drug on β-cyclodextrin (β-CD) grafted chitosan polymer was studied under different experimental conditions. The effect of Ibu concentration, mass of β-CD grafted chitosan polymer as adsorbent, contact time, temperature and pH were investigated. Three equilibrium models, Langmuier, Freundlich and Temkin isotherm models were analyzed to evaluate the adsorption isotherms. The adsorption isotherms were best fitted by Freundlich isotherm model, with correlation coefficient 0.9882, the intensity of adsorption parameters was lower than one and Freundlich adsorption isotherm constant value was more than one. High adsorption was found in acidic media pH 2, 27℃ and 1 h adsorption time. In order to investigate the kinetic of the adsorption process four kinetic models were analyzed, pseudo first order kinetic model, pseudo second order kinetic model, the Elovich kinetic model and intraparticle diffusion kinetic model. Kinetic parameters include; binding strength constant, first order adsorption rate constant, intraparticle diffusion rate constant, adsorption half time, rate constant, equilibrium constant and adsorption capacities. Correlation coefficient for each kinetic equation was reported. The adsorption kinetics was best fitted by pseudo-first order kinetic equation, with correlation coefficient 0.9922. The rate determining step is well described by intraparticle diffusion process. The Intraparticle diffusion rate constant values ranging from 0.163 to 1.1441 mgg~(-1) min~(-1/2).
机译：在不同的实验条件下，研究了布洛芬（Ibu）药物在β-环糊精（β-CD）接枝的壳聚糖聚合物上的吸附。研究了Ibu浓度，β-CD接枝壳聚糖聚合物质量，吸附时间，温度和pH的影响。分析了三种平衡模型Langmuier，Freundlich和Temkin等温线模型，以评估吸附等温线。吸附等温线最好用Freundlich等温线模型拟合，相关系数为0.9882，吸附参数强度小于1，Freundlich吸附等温线常数大于1。在pH 2、27℃和1 h的酸性介质中发现高吸附。为了研究吸附过程的动力学，分析了四个动力学模型：伪一级动力学模型，伪二级动力学模型，Elovich动力学模型和颗粒内扩散动力学模型。动力学参数包括：结合强度常数，一级吸附速率常数，颗粒内扩散速率常数，半衰期吸附，速率常数，平衡常数和吸附容量。报告了每个动力学方程的相关系数。吸附动力学最好用拟一阶动力学方程拟合，相关系数为0.9922。速率确定步骤通过颗粒内扩散过程很好地描述。粒子内扩散速率常数在0.163〜1.1441 mgg〜（-1）min〜（-1/2）范围内。

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