Introduction. The heterogenous photocatalysis is useful as a pre treatment before the biological treatment of polluting agents which are resistant to biodegradation. The phytoremediation is used to degrade and to extract polluting agents from the environment. The combination of both techniques is a good alternative for the treatment of complexometric waste with complexometric indicators. Objective. To apply photo catalysis and phytoremediation to the complexometric waste generated in the Universidad d —