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Semelhante a NBV marlea wagelmans
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NBV marlea wagelmans
- 1. Subtitel Marlea Wagelmans, Wageningen, 1 December 2011. Risk assessment at work and challanges for the future
- 3. Risk assessment in the Netherlands Step 2: Model (Sanscrit): total concentrations Step 3: Site specific risk assessment (ecology=Triad) Step 1: Soil research > Intervention values Volume > I
- 6. Details Triad activities Tidal zone Reed zone Chemistry Chemical analyses sediment Chemical analyses soil Bioaccumulation tubifex Toxicology Microtox Microtox Daphnia magna test Plant test Chironomus riparius test Earthworm test Ecology Nematodes Nematodes Macrofauna Earthworm population
- 8. Results biodegradation tests Anaerobic test Aerobic tests
- 9. Results Triad approach activities Tidal zone Reed zone Chemistry High concentrations metals, PAH and PCB Moderate concentrations metals, PAH and PCB Risks on bioaccumulation of lead, cadmium and chromium Toxicology Negative effects bacteria No effects bacteria No effects Daphnia magna No effects plant test No effects Chironomus riparius test No effects earthworm test Ecology Negative effects nematodes Moderate effects nematodes Negative effects macrofauna No effect on earthworms Summary Negative effects, not acceptable Moderate effects, acceptable
- 10. Summarizing
- 11. Remediation options Wet and tidal zone Remediation (dredging or enhanced bioremediation Dry zone Natural attenuation
- 13. Triad
- 14. Results chemistry PAF = Potentially Affected Fraction chemistry toxicology ecology parameter unit 7 8 10 13 14 16 PAH mg/kg dw 34 990 92 170 7 59 PAF total % 60 100 96 100 59 82 PAF available % 0 0 0 0 0 0 > Intervention value
- 16. Summary R= Triad risk value D= deviation RIVM rapport 607711003/2011 R < 0,25 R > 0,25 D > 0,40 BC14 BC7 BC16 BC10 BC13 BC8 Chemistry Toxic pressure 0,06 0,34 0,48 0,57 0,71 0,95 Availability 0,0 0,0 0,0 0,0 0,0 0,0 Judgement 0,03 0,18 0,28 0,34 0,46 0,77 Risk assessment Chemistry 0,03 0,18 0,28 0,34 0,46 0,77 Toxicology 0,0 0,0 0,0 0,0 0,0 0,0 Ecology 0,0 0,01 0,07 0,0 0,07 0,0 R 0,01 0,07 0,10 0,13 0,19 0,39 D 0,03 0,18 0,28 0,34 0,40 0,76
- 20. Thanks for your attention