中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 24 No. 6 June 2014 |
(School of Chemical Engineering, Northeast Dianli University, Jilin 132012, China)
Abstract:Amino-bacterial cellulose (amino-BC) was prepared by chemical modification of bacterial cellulose(BC). The adsorption characteristics and mechanism of amino-BC were studied. The results show that adsorption data can be fitted well by Langmuir equation and the pseudo-second order kinetics, indicating that the adsorption of amino-BC would obey monolayer molecule adsorption and the main action was chemisorption.Meanwhile, the adsorption process was studied by the Elovich equation and the intra-particle diffusion model, indicating that the absorption characteristics of metal ions on amino-BC is controlled by both film diffusion and particle diffusion.The increase of reaction temperature will accelerate the adsorbing rate because of endothermic reaction.
Key words: surface amination; bacterial cellulose; adsorption thermodynamics; adsorption kinetics