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1 Polish Journal of Chemical Technology

1 2002

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The effect of ozonation on sorption properties of active carbon and its porous structure. Model investigations

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Wolborska A. , Maryniak K. , Perkowski J.

Polish Journal of Chemical Technology

2002

tom Vol. 4, nr 2

42-46

The ozone-granulated active carbon system (ozone-GAC) is more often introduced in the technological water treatment cycle. The reactivity of ozone towards water pollutants leads to their oxidation and growth of biodegradability, which is well-known and favourable for the operation of a carbon bed. Does ozonation also affect the active carbon itself? Preliminary investigations on the ozonation of water solution of active carbon are presented. The results of the process were determined by analysing the porous structure of initial adsorbents and after their modification. Also the changes in their sorptivity were determined by studies of adsorption equilibrium for model systems of phenol-active carbon. In the investigations carbon types NOR1T ROW 0.8 SUPRA and PK 1-3 were used. The modification of initial adsorbents deteriorated to a small extent the parameters of porous structure such as specific surface, total pore volume and fraction of micropores. As a result of the ozonation, the sorptivity of the tested active carbon to phenol changes. In general, this change does not refer to the monolayer volume. A tendency to weaken the adsorbate-adsorbent relation is observed.