EQUILIBRIUM, ISOTHERM, KINETIC AND THERMODYNAMIC ADSORPTION STUDIES OF TETRACYCLINE HYDROCHLORIDE ONTO COMMERCIAL GRADE GRANULAR ACTIVATED CARBON
Journal Title: International Journal of Pharmacy and Pharmaceutical Sciences - Year 2015, Vol 7, Issue 1
Abstract
Objective: The work presented here reveals the adsorption pattern of Tetracycline Hydrochloride (TC-HCl) onto granular activated carbon (GAC) in a batch process.Methods: Initially the consequence of various factors such as initial concentrations at various time intervals, pH (1- 7) and temperature (15, 28, 50 °C) were carried out.Results: The removal efficiency increased with an increase in initial concentration from 200mg L-1to 800mg L-1and then decreased up to1000 mg L-1. The adsorption capacity was found to be maximum in the pH range of 6-7. The estimated enthalpy was -22.540 kJ mol-1. The initial and treated GAC were characterized by SEM that elucidated the surface pattern of TC-HCl onto GAC. The scrutinization of kinetic studies revealed that Pseudo first order and Pseudo second order model gave anexcellent fit with experimental data. Among the four equilibrium models,Freundlich and Temkin isotherm model gave a good fit and confirms that the adsorption behavior of TC-HCl onto GAC is controlled by chemisorption.Conclusion: Thus, batch adsorption of TC-HCl onto GAC was controlled by chemical reaction and an exothermic process.
Authors and Affiliations
Swapna Priya Karthick, K. V. Radha
Keywords
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