AI Article Synopsis
- The study measured twelve types of particle-bound polycyclic aromatic hydrocarbons (PAHs) in road runoff during nine events in Winterthur, Switzerland, with total PAH content ranging from 17 to 62 μg/g.
- PAH patterns showed consistency within each event but varied between different events, suggesting that environmental factors influence PAH accumulation in suspended solids.
- A toxicity evaluation determined that toxicity levels, measured in toxic equivalent concentration (TEQ), ranged between 8 and 33 μg TEQ g(-1), with some events showing different toxicity levels despite similar total PAH content.
Article Abstract
Twelve particle-bound polycyclic aromatic hydrocarbons (PAHs) were measured in the first flush regime of road runoff during nine events in Winterthur in Switzerland. The total PAH contents ranged from 17 to 62 μg/g. The PAH patterns measured at different time intervals during the first flush periods were very similar within each event irrespective of variation in suspended solids (SS) concentration within the first flush regime. However, the PAH patterns were different from event to event. This indicates that the environment plays an important role in PAH accumulation in SS. A toxicity identification evaluation approach using a toxicity equivalency factor (TEF) was applied to compare toxicities in the different events. The TEFs were found to be between 8 and 33 μg TEQ g(-1) (TEQ: toxic equivalent concentration). In some cases, two events having similar total PAH contents showed two fold toxicity differences.
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| http://dx.doi.org/10.2166/wst.2013.172 | DOI Listing |
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