Alkylphenols in atmospheric depositions and urban runoff

摘要

A sampling campaign was conducted in order to determine alkylphenol (AP) concentrations innstormwater as well as potential AP sources in suburban environments. An analytical procedurenwas developed to quantify APs in bulk atmospheric deposition, building runoff, road runoff andnstormwater. Both nonylphenols and octylphenols could be quantified in each sample. Mediannstormwater concentrations amounted to: 470 ng/l for nonylphenols, and 36 ng/l for octylphenols.nThese concentrations are 3 times higher than those found in atmospheric deposition, thus provingnthat local human activity constitutes a significant source of contamination. The contributions ofnthe various sources to stormwater have been assessed from mass balances at the catchmentnscale. 70% of AP mass in stormwater originates from building and road emissions. Annual APnfluxes have been extrapolated from the total AP mass measured over our sampling periods fornatmospheric depositions (44 to 84 mgNP/m2/yr) and stormwater (100 to 190 mgNP/m2/yr).nMoreover, since APs were mainly found in the dissolved fraction, runoff treatment devicesnbased on settling are unlikely to be very efficient.