Thermodynamic Analysis for Adsorption of Amoxicillin onto Magnetic Carbon Nanotubes
Journal Title: Journal of Pharmaceutical Research International - Year 2017, Vol 16, Issue 6
Abstract
The effect of temperature on the equilibrium adsorption of Amoxicillin (AMO) from aqueous solution using modified magnetic multi-walled carbon nanotubes (MMWCNTS) was investigated. The equilibrium adsorption data were analyzed using three widely applied isotherms: Langmuir, Freundlich and Tempkin. The results revealed that Langmuir isotherm fit the experimental results well. Kinetic analyses were conducted using pseudo-first and second-order models and the intraparticle diffusion model. The regression results showed that the adsorption kinetics were more accurately represented by pseudo-second-order model. Standard free energy changes (∆G0), standard enthalpy change (∆H0), and standard entropy change (∆S0) were calculated at different temperatures. The ∆G0 values were negative and ∆H0 values and ∆S0 values of MMWCNTS were positive; and suggested that the AMO adsorption on MMWCNTS was a spontaneous and endothermic process.
Authors and Affiliations
Davoud Balarak, Ferdos Kord Mostafapour, Ali Joghtaei
Keywords
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- EP ID EP313031
- DOI 10.9734/BJPR/2017/33212
- Views 114
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