Facilitated transport of polychlorinated biphenyls and polybrominated diphenyl ethers by dissolved organic matter

T.L. ter Laak, J.C.H. van Eijkeren, F.J.M. Busser, H.P. van Leeuwen, J.L. Hermens

Research output: Contribution to journalArticleAcademicpeer-review

63 Citations (Scopus)

Abstract

The exchange rate of hydrophobic organic chemicals between the aqueous phase and a sorbent (e.g., soil, organism, passive sampler) is relevant for distribution processes between environmental compartments, including organisms. Dissolved phases such as humic acids, proteins, and surfactants can affect the transfer of such chemicals between the aqueous and sorbent phases by sorption and desorption processes. In this study, the desorption of polychlorinated biphenyls and polybrominated diphenyl ethers from a polymer phase to an aqueous medium was monitored at different humic acid concentrations. The rate of release of the chemical by the polymer phase demonstrates thatthe chemical sorbed to dissolved humic acid contributed significantly to the total mass transfer when the affinity for the humic acid was sufficiently high. This illustrates that environmentally relevant humic acid concentrations can facilitate transport of hydrophobic organic chemicals. The consequences of these facilitated transport mechanisms for uptake into passive samplers are discussed, in particular in situations where equilibration is very slow or when exposure varies in time or space
Original languageEnglish
Pages (from-to)1379-1385
JournalEnvironmental Science and Technology
Volume43
Issue number5
DOIs
Publication statusPublished - 2009

Keywords

  • solid-phase microextraction
  • water partition-coefficients
  • hydrophobic chemicals
  • rate constants
  • bioavailability
  • congeners
  • kinetics
  • bioaccumulation
  • consequences
  • phenanthrene

Fingerprint Dive into the research topics of 'Facilitated transport of polychlorinated biphenyls and polybrominated diphenyl ethers by dissolved organic matter'. Together they form a unique fingerprint.

Cite this