Procedure for the treatment of contaminated water. The invention relates to a process for water treatment consisting of the oxidation of the contaminants by combining h2 o2/light/ilmenite. The use of ilmenite as a catalyst has a double catalytic action, on the one hand the decomposition of oxygenated water according to a heterogeneous cwpo or fenton process taking advantage of the iron contained in its structure and on the other the photocatalysis. (Machine-translation by Google Translate, not legally binding)