固定化海藻吸附金属离子的影响因素

The influencing factors of the adsorption of metal ions by immobilized marine alage

研究了固定化海带吸附含铜、镉溶液过程的影响因素，结果表明，在pH为3．0～5．0时对Cu^2＋保持高的吸附率，在pH为4．0时对Cd^2＋的吸附率达到最大．随着Cu^2＋，Cd^2＋金属离子初始浓度的降低，吸附率有所降低．对Cd^2＋的吸附率均随着温度的升高而变大．随着吸附剂浓度的增大，对Cu^2＋，Cd^2＋的吸附率逐渐升高，与此相反，对Cu^2＋，Cd^2＋的吸附量则逐渐减小．粒径对Cu^2＋的吸附率影响较小，对Cd^2＋的吸附率有较明显的变化．

The influencing factors of the adsorption of metal ions by immobilized marine alage were investigated. It can be concluded from the experimental results that, the adsorption efficiency of Cu^2＋ is high during the wide pH range of 3.0-5.0;for Cd^2＋ ,the pH range is narrow, its adsorption efficiency reaches the maximum when pH=4.0. The efficiency of Cu^2＋ and Cd^2＋ decreases as the initial concentration of Cu^2＋ and Cd^2＋ decreases. The adsorption efficiency of Cd^2＋ increases as the temperature rises. The adsorption rate increases gradually as the concentration of the sorbents increases. In contrast, the uptake of Cu^2＋ and Cd^2＋decreases gradually. The particle size little influences on the adsorption efficiency of Cd^2＋, but influence on of Cu^2＋ is significant.