Acute toxicity of runoff from sealcoated pavement to Ceriodaphnia dubia and Pimephales promelas
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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 |
| Publication Date | April 10, 2015 |
| 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 |