Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Desorption kinetics of hydrophobic organic contaminants from marine plastic pellets
Autor Endo, S.; Yuyama, M.; Takada, H.;
Journal / Serie Marine Pollution Bulletin
Erscheinungsjahr 2013
Department AUC;
Band/Volume 74
Heft 1
Sprache englisch;
POF III (gesamt) T42;
Keywords Resin pellet; Polyethylene; Marine debris; Polychlorinated biphenyl (PCB); Aqueous boundary layer
UFZ Querschnittsthemen RU3;
Abstract This study investigated the desorption behavior of polychlorinated biphenyls (PCBs) from marine plastic
pellets. Long-term desorption experiments were conducted using field-collected polyethylene (PE) pellets.
The results indicate that the desorption kinetics highly depends on the PE-water partition coefficients
of PCB congeners. After 128 d of the experiment, the smallest congener considered (CB 8) had
desorbed nearly completely (98%), whereas major fractions (90–99%) of highly chlorinated congeners
remained in the pellets. An intraparticle diffusion model mostly failed to reproduce the desorption kinetics, whereas an aqueous boundary layer (ABL) diffusion model well approximated the data. The desorption half-lives are estimated to 14 d to 210 years for CB 8 to CB 209 in an actively stirred solution (ABL thickness: 30 lm). Addition of methanol to water enhanced the desorption to a large extent. A need
for further work to explore roles of organic matter in facilitating solute transfer is suggested.
ID 14033
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=14033
Endo, S., Yuyama, M., Takada, H. (2013):
Desorption kinetics of hydrophobic organic contaminants from marine plastic pellets
Mar. Pollut. Bull. 74 (1), 125 - 131