engleski

The influence of organics on the adsorption of copper(II) on Al2O3 in seawater. Model studies with EDTA

The natural “complexing capacity” of aquatic systems was determined using titration with cupric ions. It was compared with “complexing capacity” determined in the presence of both EDTA, used as a model for organic substances, and of EDTA and γ- Al2O3. The γ-Al2O3 was used as a model for solid particles of hydrous oxide in natural waters. The adsorption isotherm of copper in seawater on γ- Al2O3 particles was determined with and without EDTA. For EDTA alone and for the Cu—EDTA complex, it was found that they are not adsorbed on γ-Al2O3 in the natural seawater. However, by adsorption on solid particles, the labile ionic Cu-complex can be removed from the seawater.

copper ; complexing capacity ; adsorption ; alumina particles

nije evidentirano