Photocatalysis as a pre-treatment prior to a biological degradation of cyproconazole

► We investigate the feasibility of coupling photocatalysis and biodegradation to treat cyproconazole. ► Cyproconazole was not biodegradable by Pseudomonas fluorescens and completely mineralised by photocatalysis. ► Biodegradability of cyproconazole solution was not enhanced by photocatalysis treatment.