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Adsorption–Desorption Studies Of One Of Antihypertensive Drug in Solution on Selected Clays Surfaces | ||
| Al-Mustansiriyah Journal of Science | ||
| Article 1, Volume 21, Issue 5, 2010, Pages 265-277 | ||
| Author | ||
| Athraa. S. Ahmed | ||
| Abstract | ||
| The experimental work cocern the studying of the adsorption- desorption systems of Bisoprelolhemifumarats by using two of Iraqi natural clays kaolin and attapulgite focused on determining the adsorption – desorption isotherms of the adsorbates employed in this study. The concentrations, both before and after the attainment of equilibrium; were determined with the aid of U.V. spectro photometric technique. The effect of initial drug concentration, temperature, contact time, solution pH, ionic strength and desoreption of the drug from the two surfaces was studied. The equilibrium sorption isotherms have been analysed by the Freundlich and langmuir models. The Freundlich isotherms had the highest correlation coefficients. The apparent thermodynamic parameters were calculated and the abtained values support the conclusion that the drug molecules sorbs by exothermic process. Drug adsorption was the highest at neutral pH value. The adsorbed amount of studied drug on attapulgite clay is decreased with increasing ionic strength, but adsorbed amount of the same drug on kaolin clay has of a limited influenced with increasing the ionic strength. In addition, kaolin, attapuglite clays were compared according to their efficiency of drug desorbing | ||
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