2023 SETAC Europe Presentations
Smithers scientists presented at the SETAC Europe Annual Meeting in Dublin, 30 April - 4 May.
Research into Urban Runoff Mortality Syndrome (URMS) has sought to identify some of the pollutants that are potentially toxic to species present in urban watercourses. Certain species were identified as being particularly sensitive to 6PPD-quinone, a transformation product of a 6PPD, which is one of the most widely used antiozonants present in tires and other rubber products produced and used globally. Literature has suggested that tire and road wear particles (TRWP) are a potential source of 6PPD-quinone in watercourses.
The current study was undertaken to further understand the behaviour of 6PPD and 6PPD-quinone in the solid state when exposed to various concentrations of oxygen and ozone. 14C Radiolabeled 6PPD and 6PPD-quinone were used to aid the tracking of transformation products throughout the study. The oxidation of 6PPD and 6PPD-quinone were studied at reduced and atmospheric levels of oxygen. The ozonolysis of 6PPD and 6PPD-quinone was studied at environmentally-relevant levels of ozone. In both cases, the effects of the presence or absence of sunlight was studied.
Rory Mumford Technical Expert, presented this research at the SETAC Europe 33rd Annual Meeting, 30 April – 4 May 2023, in Dublin, Ireland.