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Variation in PAH patterns in road runoff.

Rupak Aryal1, Hiroaki Furumai, Fumiyuki Nakajima

  • 1School of Natural and Built Environment, University of South Australia, Mawson Lakes 5095, Australia. Rupak.Aryal@unisa.edu.au

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|June 22, 2013
PubMed
Summary
This summary is machine-generated.

Road runoff contains particle-bound polycyclic aromatic hydrocarbons (PAHs). PAH patterns varied between events, indicating environmental influence on accumulation. Toxicity equivalency factors (TEFs) quantified varying toxic impacts.

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Ecotoxicology

Background:

  • Road runoff is a significant pathway for environmental pollutant transport.
  • Polycyclic Aromatic Hydrocarbons (PAHs) are common contaminants associated with particulate matter.
  • Understanding PAH behavior in the first flush is crucial for water quality management.

Purpose of the Study:

  • To quantify particle-bound polycyclic aromatic hydrocarbons (PAHs) during the first flush of road runoff.
  • To investigate the variability of PAH patterns and their associated toxicity across different runoff events.
  • To assess the influence of environmental factors on PAH accumulation in suspended solids.

Main Methods:

  • Measurement of twelve particle-bound PAHs in road runoff samples.
  • Analysis of PAH patterns at different time intervals within the first flush regime.
  • Application of a toxicity identification evaluation using toxicity equivalency factors (TEFs).

Main Results:

  • Total PAH content ranged from 17 to 62 μg/g.
  • PAH patterns were consistent within events but varied significantly between events.
  • Toxicity equivalency factors (TEFs) ranged from 8 to 33 μg TEQ g(-1), with up to two-fold toxicity differences between events with similar total PAH levels.

Conclusions:

  • Environmental factors significantly influence PAH accumulation in suspended solids during road runoff events.
  • PAH patterns in road runoff are event-specific, despite consistent patterns within individual events.
  • TEF analysis reveals substantial differences in toxic potential, highlighting the importance of considering PAH composition beyond total concentration.