氧化改性ACF对铅离子吸附作用的研究

Study on Pb^(2+) Adsorption Properties of ACF modifled with oxidation

为了提高活性炭纤维(ACF)对水体中重金属铅离子的吸附性能,采用浓HNO3对ACF进行了氧化改性,并采用静态吸附法,考察了不同实验条件对样品吸附铅离子的影响。实验结果表明:1.氧化改性后样品对铅离子的吸附速率非常迅速,吸附平衡时间仅需要5 min。2.氧化改性后ACF在较宽的pH值范围内保持着对铅离子较高的吸附性能。

For further improving its adsorption capacity, ACF was modified by oxidation with concentrated nitric acid, and then under the varies experiment conditions, we investigate the properties of adsorbing Pb^2＋ of ACF and oxidized ACF. The results showed that all samples had a rapid adsorption rates（the equilibration time of adsorption was only 5 min）,and the oxidized ACF had good adsorption properties in a quite wide range of pH values.