Notice of RetractionAdsorption Behaviors of Basic Amino Acids on a Spherical Cellulose Adsorbent

Notice of Retraction

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An investigation was conducted on the adsorption and desorption of three basic amino acids (L-His, L-Lys and L-Arg) with a spherical cellulose adsorbent containing the carboxyl group. Static experiments were carried out as function of pH, initial amino acid concentration, adsorption time and temperature. The adsorbent showed excellent adsorption capacities for the mentioned basic amino acids. The equilibrium adsorption data of the amino acids on adsorbent were analyzed by Langmuir and Freundlich models. The kinetics of basic amino acids adsorption nicely followed the second-order rate expression which demonstrated that chemical adsorption plays a significant role in the adsorption mechanism. Moreover, dynamic experiments were performed to determine the breakthrough curves. Regeneration experiments were tried four cycles and the results implied that the cellulose adsorbents had such advantages as simple regeneration, high recovery and reusability.