Adsorption of Diclofenac From Aqueous Solution Using Cyclamen Persicum Tubers based Activated Carbon (CTAC)

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Journal Title, Volume, Page: 
Journal of the association of Arab Universities for Basic and Applied Sciences 01/2015
Year of Publication: 
Shehdeh Jodeh
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Wade Jodeh
Ismail Warad
Nidal A Jaradat
Current Affiliation: 
Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University, Nablus, Palestine
Fatima Abdelwahab
Preferred Abstract (Original): 

This study aims to use the tissues of Cyclamen persicum tubers to prepare activated carbon (CTAC) by different methods then to set up a thermodynamic study of the pharmaceutical diclofenac sodium (DCF) adsorption from aqueous solution onto this activated carbon. Optimum percent of DCF removal was 72 % when CTAC dosage was 0.25 g and DCF concentration 50 mg/L. Percentage removal of DCF increases when the concentration of DCF increases as the maximum percentage removal reached 81 % when DCF concentration was 70 mg/L and 0.7 g CTAC and pH ranging from 6 to 2.
Freundlich model describes efficiently adsorption isotherm of DCF onto CTAC with n equal to 1.398 which value indicates a favorable adsorption. This finding validates the assumption of multilayer physical adsorption process of DCF. The results showed that DCF was physically adsorbed onto CTAC, as confirmed by the values of ΔH° minor than 40 Kj/ mol. As ΔG° had negative charge, the adsorption process is exothermic, and the adsorption process of the DCF onto CTAC is spontaneous, depending on temperature.

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