Adsorption Behaviors Of Metal Ions On Collagen Fiber Immobilized Bayberry Tannin

Using collagen fiber as matrix, the immobilized bayberry tannin was prepared through aldehydic cross-linking reaction. As a novel adsorbent,its ability of removing or recovering Cr(VI), Pb(II), Cd(II), Hg(II), Pt(II), Pd(II), V(V), Bi(III) and Mo(VI) from aqueous solutions was studied. The adsorption isotherms, adsorption kinetics, column adsorption kinetics and adsorption-desorption behaviors of metal ions on the collagen fiber immobilized bayberry tannin were investigated. In addition, the adsorption selectivity of the immobilized tannin to some metal ions in the mixture solutions of metal ions was also investigated. Meanwhile, in order to better understand the adsorption regulations of metal ions on the adsorbent, the effects of ionic radius, electronic configuration and valence of metal ions on adsorption capacity were investigated. These studies would be significant in exploring applications of collagen fiber immobilized bayberry tannin on chemical industry, environmental protection, metallurgical and medicine sectors. At the same time, the experimental results could be scientifically valuable to enrich the knowledge of tannin chemistry and adsorption theory.The adsorption capacities of Cr(VI), Pb(II), Cd(II), Hg(II), Pt(II), Pd(II), V(V), Bi(III) and Mo(VI) on the immobilized bayberry tannin were determined. It was...