The Adsorption of Calmoduline via Nicotinamide Immobilized Poly(HEMA-GMA) Cryogels

The separation and purification methods for the isolation of an important biomolecule calmoduline protein is extremely important. Among these methods, the adsorption technique is extremely popular, and the cryogels as adsorbents with the macro porous structure and interconnected flow channels cryogel they have are preferred in this field. In this study, the adsorption of calmoduline via Ca(II) immobilized poly (2-hydroxyethyl methacrylate-glycidyl methacrylate), poly (HEMA-GMA), cryogels through changing interaction time, calmoduline initial concentration and temperature conditions. For the characterization of cryogels, the swelling test, Fourier Transform Infrared (FT-IR) Spectroscopy, Scanning Electron Microscopy (SEM), surface area (BET), elemental analysis and ICP-OES methods were performed. Nicotinamide molecule was used as Ca (II) chelating agent and the adsorption capacity of the cryogels was estimated as 1.812 mg calmoduline / g cryogel. The adsorption models of the adsorption reaction were examined by the Langmuir and Freundlich isotherm models and was determined to be more appropriate for Langmuir isotherm model.