REGENERATION OF AG-3 ACTIVATED CARBON USED IN SURFACE WATER PROCESSES
Mihai CIOBANU, Tudor LUPAȘCU, Nina ȚÎMBALIUC, Nina BOLDURESCU, Universitatea de Stat din Moldova
Аннотация
The thermal regeneration process of the used AG-3 activated carbon from the water treatment plant in Chisinau
was studied. The regeneration process was carried out at different temperatures and for different periods of time
with water vapor. To evaluate the degree of regeneration of activated carbon samples, the adsorption isotherms of
benzene and methylene blue from aqueous solutions were measured. It was found that at high temperatures the complete regeneration of the used AG-3 activated carbon occurred. This fact has been confirmed by the practically equal
methylene blue adsorption values on the regenerated activated carbon and on the intact one. At temperatures close to
8000 C, the adsorptive capacity of the regenerated used AG-3 activated carbon is even higher than that of the intact
AG-3 activated carbon, a fact that can be explained by the complete oxidation of the amorphous carbon remaining
in the carbonized porous structure.
Keywords: activated carbon, thermal regeneration, adsorption, desorption, benzene, blue methylene.
