The adsorption characteristics of Zn2+ from electrolytic solution by activated charcoal have been investigated. It was found that the amount of adsorption of Zn2+depends mainly on pH value of the solution, added inorganic ions and containing Oxygen groups on the surface. The activated charcoal was treated with oxidation-negative ionizing (OA) method in order to produce more containing oxygen groups on the surface. The adsorption amount of Zn2+ on the treated activated charcoal increased remarkbly. It was also found that more times the activated charcoal was treated, the more powerful the activity of the surface, and the larger the adsorption the amount of Zn2+, so the charged grorps on the surface of activated charcoal are considered as the main adsorption activated sites for inorganic ions. The adsorption characteristics of various complexes of Zn2+ on the surface of activated charcoal have also been investigated. Three types of adsorption configuration of the complexes of Zn2+ on the surface of activated charcoal were suggested according to the experimental results.