固定化海藻吸附金属离子的影响因素

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Cu2+保持高的吸附率,在pH为4.0时对Cd2+的吸附率达到最大.随着Cu2+,Cd2+金属离子初始浓度的降低,吸附率有所降低.对Cd2+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Cu2+,Cd2+的吸附率逐渐升高,与此相反,对Cu2+,Cd2+的吸附量则逐渐减小.粒径对Cu2+的吸附率影响较小,对Cd2+的吸附率有较明显的变化.

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

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.