Title

Kinetics of Polychlorinated Biphenyl Partitioning to Marine Chrysophyte Isochrysis Galbana

Publication Date

2-1-2012

Document Type

Article

Abstract

This study focused on the uptake kinetics of polychlorinated biphenyl (PCB) congeners by the Chrysophyte. Isochrysis galbana. A gas-purging experimental system was used to maintain constant dissolved PCB concentrations. Three phases of absorption were observed: first, a rapid absorption phase within the first 15 min, second, a first order process reaching the maximum concentration within 48 h of exposure, and third, a plateau phase as yet to be determined with very slight increases in concentration. In this study, the percentage of the maximum concentration reached within the first phase varied from 10% to 67%, depending on the size of the PCB (as determined by molecular weight and total surface area), whereas the uptake rate (k(u)) during the second phase was more comparable across different PCBs. In addition, for the first phase, the bioconcentration factor (BCF) of PCBs deviated from its expected relationship with hydrophobicity. as determined by K-ow, and was instead related to the molecular structure of the compound.

Publication Title

Science Of The Total Environment

Volume

416

First Page

410

Last Page

417

DOI

10.1016/j.scitotenv.2011.11.042

Version

pre-print, post-print allowed

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