Environmental Fate Studies
Experts in determining the pathways of active ingredient distribution in the environment through environmental fate studies for conventional and biological agrochemicals.
Investigation into the Fate of 6PPD and 6PPD-Quinone in Aquatic Conditions
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Urban Runoff Mortality Syndrome (URMS) is a term used to describe the link between pre-spawn mortality in coho salmon and stormwater. A transformation product of 6PPD, 6PPD-quinone (6PPD-Q), was identified which is assumed to derive from tire and road wear particles (TRWP) and washed into watercourses during storm events. Published data have shown the sensitivity of coho salmon to 6PPD-Q. 6PPD is one of the most widely used antiozonants present in tires produced globally. The effects on aquatic environments of 6PPD itself have been thoroughly studied, however, transformation products of 6PPD (and its homologues) and their environmental relevance are not widely considered.
The current study strives to understand the behavior of 6PPD and 6PPD-Q in the aquatic environment. 14C-radiolabeled 6PPD and 6PPD-quinone were synthesized to aid the tracking of transformation products throughout the study. The hydrolytic behavior of 6PPD and 6PPD-Q was studied. Sterile natural waters were used to study the effect of trace elements which are known to impact the rates and the routes of transformation.
Rory Mumford, Technical Expert, Environmental Fate and Metabolism, presented the research at the SETAC North America 43rd Annual Meeting, November 13-17, 2022.