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Acute toxicity of runoff from sealcoated pavement to Ceriodaphnia dubia and Pimephales promelas

Environmental Science & Technology
By: , , , , and 
https://doi.org/10.1021/acs.est.5b00933

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Abstract

Runoff from coal-tar-based (CT) sealcoated pavement is a source of polycyclic aromatic hydrocarbons (PAHs) and N-heterocycles to surface waters. We investigated acute toxicity of simulated runoff collected from 5 h to 111 days after application of CT sealcoat and from 4 h to 36 days after application of asphalt-based sealcoat containing about 7% CT sealcoat (AS/CT-blend). Ceriodaphnia dubia (cladocerans) and Pimephales promelas (fathead minnows) were exposed in the laboratory to undiluted and 1:10 diluted runoff for 48 h, then transferred to control water and exposed to 4 h of ultraviolet radiation (UVR). Mortality following exposure to undiluted runoff from unsealed asphalt pavement and UVR was ≤10% in all treatments. Test organisms exposed to undiluted CT runoff samples collected during the 3 days (C. dubia) or 36 days (P. promelas) following sealcoat application experienced 100% mortality prior to UVR exposure; with UVR exposure, mortality was 100% for runoff collected across the entire sampling period. Phototoxic-equivalent PAH concentrations and mortality demonstrated an exposure-response relation. The results indicate that runoff remains acutely toxic for weeks to months after CT sealcoat application.

Publication type Article
Publication Subtype Journal Article
Title Acute toxicity of runoff from sealcoated pavement to Ceriodaphnia dubia and Pimephales promelas
Series title Environmental Science & Technology
DOI 10.1021/acs.est.5b00933
Volume 49
Issue 8
Year Published 2015
Language English
Publisher American Chemical Society
Contributing office(s) Texas Water Science Center
Description 10 p.
First page 5060
Last page 5069
Online Only (Y/N) N
Additional Online Files (Y/N) N
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