Role de l'ozone sur l'adsorbabilité et la biodégradabilité de quelques composes organiques sur charbon actif en grains effect of ozone on adsorbability and biodegradibility of a few organic compounds over granular activated carbon

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Abstract
The Freundlich isotherms of phenol and of its ozonation products in synthetic solution show that the ozonated products are less adsorbed than the phenol itself. The same results are obtained with solutions of phenol ozonated at different rates in filtered surface water. However, the GAC [granular activated carbon] filtration of ozonated phenol dissolved in surface water produces a very important uptake of TOC [total organic carbon]. ATP measurements at different levels of the GAC column express bacterial activity in relation with the percentage of TOC removal. Inhibition of bacterial activity due to the introduction of a silver salt leads to a drop of TOC elimination.