Abstract
The adsorption behavior of Cd2+ on manganese dioxides was studied in the paper, especially the influence factors of the adsorption behavior were concerned. The results showed that the adsorption equilibrium reached in about six hours. The adsorption amount of Cd2+ on the manganese dioxide increased with the increasing of the initial Cd2+ concentration, and the adsorption rate increased at first, then decreased. The adsorption isotherm curve accorded with Langmuir isotherm equation. The most influence factor on the adsorption properties of the manganese dioxide was pH value. After the addition of inorganic salts, only the ammonium bicarbonate could promote the adsorption of Cd2+ on the manganese dioxide, other inorganic salts inhibited the adsorption.
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