Dhafir T. Ajeel Al-Heetimi, Muna Abdul Rasool Kadhum and Omar S. Alkhazrajy
الملخص الانجليزي
Pharmaceuticals are widely distributed in different applications and also released into the environment. Adsorption of Ciprofloxacin HCl (CIPH) on Porcelinaite was studied at ambient conditions. The adsorption isotherms can be well described using the Freundlich and Temkin equations. The pH of the solution influences significantly the adsorption capacity of Porcelinaite, the adsorption of CIPH increased from the initial pH 1.3 and then decreased over the pH rang of 3.8-9. The adsorption is sensitive to the change in ionic Strength, which indicate that electrostatic attraction is a significant mechanism for sorption process. The enthalpy change (ΔH) for the adsorption of CIPH onto Porcelinaite signifies an endothermic adsorption. The ΔG value is negative at all studied temperatures, inferring that, the adsorption of CIPH onto porcelinaite will follow a spontaneous trend. The ΔG value decreased when the temperature increased from 15 oC to 37.5 oC, suggesting increase in adsorption of CIPH with increasing temperature. The positive value of ΔS reflects the affinity of porcelinaite towards drug and also suggests increased randomness at the solid-solution interface.
تاريخ النشر
03/03/2014
الناشر
Journal of Al-Nahrain University
رقم المجلد
17
رقم العدد
1
الصفحات
41-49
الكلمات المفتاحية
Adsorption, Ciprofloxacin HCl, Freundlich and Temkin isotherms, Porcelinaite, Thermodynamic parameters.
منى عبد الرسول الخزرجي | muna al kazragi | 4426