Abstract
Abstract The catalytic wet hydrogen peroxide oxidation of p-coumaric acid, a model organic pollutant typically found in olive mill wastewaters, has been investigated over Al-Fe pillared clay. We have shown that in rather mild experimental conditions and with a low excess of H2O2, the use of (Al-Fe) pillared montmorillonite allows a total elimination of p-coumaric acid and a significant TOC abatement, without significant leaching of Fe ions. The most important intermediates have been identified and their concentration profiles have been determined by HPLC analysis. Reaction mechanisms and pathways were postulated. It was found that the distribution of the intermediate compounds was strongly dependent on the pH of the solution.
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