Preliminary investigation of 6PPD-quinone in surface water and standing road water in Michigan

Nedrich, Sara

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https://hdl.handle.net/2142/114134 Copy

Description

Title

Preliminary investigation of 6PPD-quinone in surface water and standing road water in Michigan

Author(s)

Nedrich, Sara

Issue Date

2022-04-28

Keyword(s)

• tire
• road chemicals
• plastic
• rubber
• microplastics
• degradation product

Abstract

Recent studies have identified a new emerging contaminant, 6PPD-quinone (N-(1,3-dimethylbutyl)-N-phenyl-p-phenylenediamine), which has been attributed to significant salmon mortality in rivers in the Pacific Northwest (Tian et al., 2021). Sampling for 6PPD-quinone was conducted in surface water and standing road water in 11 watersheds throughout Michigan. Sample sites were selected to address various research questions, including whether 6PPD-quinone release would increase with recycled crumb rubber road paving technologies. Surface water samples (n=17) were collected from rivers or creeks adjacent to or intersecting roadways following storm events in August-September of 2021. Five standing road water (puddle) samples were also collected. Only two of 17 surface water samples exceeded detection limits (MDL = 3 ng/L) at 12 and 37 ng/L., which fell below the reported LC50 for coho salmon of 95 ng/L (Tian et al. 2022). All five puddle samples had elevated concentrations of 6PPD-quinone, ranging from 54-660 ng/L. All surface water sites sampled along crumb rubber mixed asphalt and asphalt rubber chip seal roadways were non-detect for 6PPD-quinone. Additional sampling is proposed for the summer of 2022 to target a river adjacent to a highly trafficked roadway that is reported to support spawning sport fish.

Series/Report Name or Number

2022 Emerging Contaminants in the Environment Conference (ECEC22)

Type of Resource

• text
• still image

Language

en

Permalink

• https://youtu.be/ZC92Lfg1AvU
• http://hdl.handle.net/2142/114134

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