PMID- 19695667
OWN - NLM
STAT- MEDLINE
DCOM- 20091117
LR  - 20101118
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 77
IP  - 5
DP  - 2009 Oct
TI  - Mathematical explanation for the non-linear hydrophobicity-dependent 
      bioconcentration processes of persistent organic pollutants in phytoplankton.
PG  - 679-86
LID - 10.1016/j.chemosphere.2009.07.048 [doi]
AB  - Phytoplankton play a vital role in determining the fate and transport of 
      persistent organic pollutants (POPs) in aquatic ecosystems. Lipids in 
      phytoplankton cells can accumulate POPs, and equilibrium partitioning of the 
      chemicals between lipids and water can be deduced from the octanol/water 
      partition coefficient (K(ow)). However, there is much uncertainty in the response 
      of the bioconcentration factor (BCF) to K(ow). While distinct level-off and 
      bell-shaped responses of BCF to K(ow) have been confirmed by laboratory 
      experiments, a mathematical basis for the non-linear processes has been lacking. 
      Using two differential equation models (Water-Phytoplankton and 
      Water-Phytoplankton-Dissolved Organic Carbon) we here examine previously reported 
      non-linearity between BCF and K(ow). Our modelling studies suggest that a 
      level-off response of the true BCF (BCF estimated at equilibrium) to K(ow) could 
      be attributed to the presence of dissolved organic carbon (DOC). The alternative 
      bell-shaped response appears to be a consequence of the apparent BCF (BCF 
      estimated at non-equilibrium) for which the slow uptake rate of chemical 
      compounds of relatively large molecular mass by phytoplankton is responsible.
FAU - Seto, Mayumi
AU  - Seto M
AD  - Research Center for Environmental Risk, National Institute for Environmental 
      Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan. seto@nies.go.jp
FAU - Handoh, Itsuki C
AU  - Handoh IC
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20090819
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Organic Chemicals)
RN  - 0 (Water Pollutants, Chemical)
SB  - IM
MH  - Environmental Monitoring
MH  - Hydrophobic and Hydrophilic Interactions
MH  - Kinetics
MH  - *Models, Chemical
MH  - Organic Chemicals/*analysis
MH  - Phytoplankton/*metabolism
MH  - Water Pollutants, Chemical/*analysis
EDAT- 2009/08/22 09:00
MHDA- 2009/11/18 06:00
CRDT- 2009/08/22 09:00
PHST- 2009/04/03 00:00 [received]
PHST- 2009/07/17 00:00 [revised]
PHST- 2009/07/17 00:00 [accepted]
PHST- 2009/08/22 09:00 [entrez]
PHST- 2009/08/22 09:00 [pubmed]
PHST- 2009/11/18 06:00 [medline]
AID - S0045-6535(09)00846-7 [pii]
AID - 10.1016/j.chemosphere.2009.07.048 [doi]
PST - ppublish
SO  - Chemosphere. 2009 Oct;77(5):679-86. doi: 10.1016/j.chemosphere.2009.07.048. Epub 
      2009 Aug 19.