Christopher G. Ingersoll
Peter C. Van Metre
James L. Kunz
Edward E. Little
Barbara Mahler
2015
<p><span>Runoff from coal-tar-based (CT) sealcoated pavement is a source of polycyclic aromatic hydrocarbons (PAHs) and </span><i>N</i><span>-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). </span><i>Ceriodaphnia dubia</i><span> (cladocerans) and </span><i>Pimephales promelas</i><span> (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 (</span><i>C. dubia</i><span>) or 36 days (</span><i>P. promelas</i><span>) 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.</span></p>
application/pdf
10.1021/acs.est.5b00933
en
American Chemical Society
Acute toxicity of runoff from sealcoated pavement to <i>Ceriodaphnia dubia</i> and <i>Pimephales promelas</i>
article