Adsorption of Cesium Ion on Silk Fibroin in Aqueous Solution

Abstract

The adsorption behaviors of cesium ion on silk fibroin (SF) fibers in aqueous solution were investigated for applications to purify the contaminated water by radioactive cesium ion. The ability of adsorption of cesium was smallest among the other metal ions compared. Tendency of such adsorption was explained in terms of the stability of the combination between the ions and the SF. The optimal condition for adsorption of cesium ion was searched. The thermodynamic adsorption behavior was discussed using the Langmuir and the Freundlich equilibrium adsorption models.