Effects of sensitizers and inhibitors on phototransformation of polychlorinated dibenzo-p-dioxins (PCDDs)

The present study was designed to obtain a measure of the change in phototransformation efficiency in the presence of other chemicals. The efficiency of the phototransformation was evaluated by determining quantum yield and photohalf-lives of polychlorinated dibenzo-p-dioxins (PCDDs) in presence and absence of cocontaminants and sensitizers. The results obtained showed that the presence of these cocontaminants can affect the efficiency of the photodegradation process. The experimental results also showed that the efficiency of phototransformation is depended on the solvent and PCDD congener itself. Photoproducts has been found in both absence and presence of inhibitors or sensitizers.