Bioavailability of organic compounds

 
Bioavailability of compounds in water bottoms and food chain
(Koploperproject “Biobeschikbaarheid van stoffen in waterbodems en voedselketens”)

Part A: Delivery of compounds from water bottoms to surface water
(Nalevering van stoffen uit waterbodems)
Report C131/07 Nalevering Waterbodems, uitvoeren meetcampagne en analyseren nalevering PBDE’s en HBCD’s uit waterbodems

Part C: Behaviour of compounds in food chains and top predators
(Gedrag van stoffen in voedselketens en toppredatoren)
Peport C140/07 Chemical/biological analyses of harour porpois samples to identify contaminants in the food chains.
 

Part A: September 2007 – December 2007
Part C: September 2007 – December 2007

Client(s) & funding

Part A: RIZA/Waterdienst
Part C: RIKZ/Deltares

Objectives

Part A:
This project must lead to understanding of situations where delivery of compounds from the water bottom to the surface water will create of significant (secondary) source of pollution
Part C:
The main objective of this project is to identify possible causes of the increasing number of harbour porpoises that are stranded on the Dutch coast.

Summary

Part A:
IMARES has worked on a part of the implementation of the measure concept “Meetplan nalevering waterbodems”, made by Alterra. IMARES has mainly focused on the pretreatment and analyses of organic contaminants (PAHs, PCBs, PBDEs and HBCDs). Besides that, IMARES was present as sampling coordinator during field sampling.
Part C:
IMARES has analyzed polychlorinated biphenyls (PCBs), brominated flame retardants (PBDEs, HBCD isomers, TBBP-A and me-TBBP-A), perfluorinated compounds, organotin compounds and sample characteristics such as dry weight, protein and fat content in twelve blubber and/or liver samples of harbour porpoise that where found stranded on the Dutch coast in 2006.

Part A:
Wageningen IMARES did not only analyzed the organic contaminants in sediment, suspended matter and biota, but also worked on the pretreatment, extraction and analyses of the silicon rubber passive samplers. Notable is that the concentration of BDE209 in sediment and suspended matter was much higher than the other PBDEs and that BDE209 was found in the biota samples. Degradation of BDE209 was expected, for that reason  the nonaBDEs were measured but not detected, except for the passive sampler extracts.
>> Figures and results in presentation "Gebromeerde vlamvertragers, totaalgehaltes PBDE’sen HBCD’s" (in Dutch)

Part C:
>> Figures in pdf
One of the porpoise samples was very lean compared to the other porpoise samples. For that reason the concentration of most PBCs, PBDEs and α-HBCD was very high in that sample (figure 1 and 2). The nonaBDEs were performed for the first time. The concentration of the nonaBDEs can be an important parameter to asses contaminationby decaBDE, which is still produced and which is known to decompose to lower brominated congeners. Both nona- and decaBDE were not detected in the porpoise samples. Compounds with the highest concentration are BDE47 and α-HBCD. Notable is that the concentration PFOS was very high for all porpoise samples, compared to the other perfluorinated compounds (figure 3). During this project the method for analyzing organotin compounds is developed based on the method from RIKZ. The highest concentrations are measured for tributyltin and dibutyltin (figure 4)

Staff involved

Peter Korytár, Ilona Velzeboer, Evert van Barneveld, Philip Nijssen, Christiaan Kwadijk, Judith van Hesselingen, Alwin Kruyt, Maadjieda Tjon-Atsoi

Related Product:   Monitoring