Equilibrium and kinetic aspects of Sodium cromoglycate (cas 15826-37-6) adsorption on chitosan: Mass uptake and surface charging considerations
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Add time:10/01/2019 Source:sciencedirect.com
Chitosan has more and more been suggested as a material for use as adsorbent in the treatment of effluents as well as in the synthesis of drug-loaded nanoparticles for controlled release. In both cases, a good understanding of the process of adsorption, both kinetically and in terms of equilibrium, has an importance of its own. In this manuscript we study the interaction between Sodium cromoglycate (cas 15826-37-6), a drug used in asthma treatment, and chitosan. Equilibrium experiments showed that Sips (or Freundlich–Langmuir) isotherm described well the resultant data and adsorption possibly occurred as in multilayers. A model based on ordinary reaction-rate theory, compounded of two processes, each one with a correlated velocity constant, described the kinetics of sorption. Kinetic and equilibrium data suggested the possibility of surface rearrangement, favored by the increase of temperature.
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