活性炭纤维对于离子的电吸附选择性能研究

摘要

通过循环伏安测试、交流阻抗测试、电吸附实验等方法研究了单组分和多组分溶液中不同离子在活性炭纤维电极表面的选择性电吸附性能。结果表明，电吸附选择性能与离子的水合半径、离子价态、离子浓度有关；增大初始浓度可以提高电吸附容量；并且，由于强烈的选择吸附作用，Ca2＋离子可以吸附取代其它已经被吸附的离子。%The cyclic voltammetry ,Ac impedance and electrosorption experiments are done to study the electrosorption se-lectivity of different ions by activated carbon fiber electrodes in single and multi-ionic solutions .It is shown that the elec-trosorption selectivity of ions is related to hydrated radius ,ionic charge and concentration .The electrosorption capacity can be increased by increasing the initial concentration .In addition ,Ca2+ can adsorb other adsorbed ions due to strong selectivi-ty .