Dissolved organic matter enhances transport of PAHs to aquatic organisms.
In this study, the uptake of pyrene and benzo[b]fluoranthene by an aquatic worm (Lumbriculus variegatus) and a poly(dimethylsiloxane) coated glass fiber was studied at different humic acid concentrations. The accumulation of pyrene was not affected by the presence of the humic matrix. However, the accumulation rate of benzo[b]fluoranthene increased a factor of 3 for the fiber and a factor of 4 when 55 mg L(-1) dissolved organic carbon was added in the form of humic acid. The difference between the two chemicals can be explained by the higher affinity of benzo[b]fluoranthene for the dissolved humic material. A comparison of modeled transport enhancement of benzo[b]fluoranthene by humic acid and the experimental results suggested that the benzo[b]fluoranthene complexed with the humic phase was not completely labile.
Institute for Risk Assessment Sciences (IRAS), Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands. thomas.ter.laak@kwrwater.nl
Thomas L
TL
Ter Laak
Martin A
MA
Ter Bekke
Joop L M
JL
Hermens
D000042:Absorption; D000818:Animals; D020240:Apraxia, Ideomotor; D001692:Biological Transport; D004784:Environmental Monitoring; D005449:Fluorenes / Q000737:chemistry / Q000378:metabolism* / Q000493:pharmacokinetics; D009835:Oligochaeta / Q000378:metabolism*; D011721:Pyrenes / Q000737:chemistry / Q000378:metabolism* / Q000493:pharmacokinetics; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism
D005449:Fluorenes; D011721:Pyrenes; D014874:Water Pollutants, Chemical; D014867:Water; C030984:pyrene; C006703:benzo(b)fluoranthene