Presentation is loading. Please wait.

Presentation is loading. Please wait.

Occurrence and potential effects of microplastics in the Belgian coastal area By: ir. S. De Meester M. Claessens.

Similar presentations


Presentation on theme: "Occurrence and potential effects of microplastics in the Belgian coastal area By: ir. S. De Meester M. Claessens."— Presentation transcript:

1 Occurrence and potential effects of microplastics in the Belgian coastal area By: ir. S. De Meester M. Claessens

2 Facts Growing plastic production: 1950: 1.5 million tons per year 2006: 245 million tons per year The largest part is still being dumped Worldwide problem: the oceans are connected

3 Facts Growing plastic production: 1950: 1.5 million tons 2006: 245 million tons The largest part is still being dumped Worldwide problem: the oceans are connected Of all garbage 60-80% is plastic (macroplastics)

4

5 UV + mechanical forces 01 Microplastic

6 Microplastics Thompson et al. 2004: “Lost at sea, where is all the plastic” Detection of microplastics in sediment and water In all following research microplastics were found, but there is no agreement on concentrations

7 Overview of this research Method Occurrence in the Belgian Coastal area? Historical trend? Origin? Microplastics vs macroplastics? Potential effects? Conclusion

8 Method Koksijde-Bad Groenendijk Nieuwpoort Sandbank Zeebrugge Oostende

9 Method Microplastics Sediment Saline solution Taking samples in the Belgian coastal area Filtration of top layer Identification with IR Stirring sediment in a saline solution Searching for an appropriate method was difficult Method of Thompson modified (based on density)

10 Method Scale: mm Fibers Granules Plastic films PS spheres

11 Occurrence (Belgian coastal area)

12

13 Occurrence (Oostende)

14 Historical trend?

15 Short-term (Koksijde-Bad)

16 Long-term (Groenendijk)

17 Origin Fibers: Fishery,… Granular: shipping, sewers, tourists,… Plastic films: tourism, shipping,… PS spherules: scrubbers in (hand) cleansers: used in harbours. PS sinks: up to 100 spherules/m³

18 Microplastics vs macroplastics Difficult: no unity in research (per m²,kg,…?) Macroplastics: ± 52 – 1179 g/100m² Microplastics: ± 5 – 11 g/100m²  ± 1 – 20% of all plastic is microplastics (weight)  More unity & further research needed

19 Potential effects Plastic Pollutant

20 Potential effects Plastic Pollutant

21 Potential effects Worst case calculation through equilibrium  Microplastics are indeed able to spread the pollution and transfer it through pore water to organisms  Arenicola marina in an otherwise clean environment with contaminated microplastics can take up ng phenanthrene and ng PCB per worm Physical effects? Ingestion? Desorption? …?  Further research needed (experiments)

22 Conclusion Microplastics were found in all samples The problem seems to be growing A lot of further research needed: – Effects: physical & chemical experiments – Method needs to be optimized (density + particles < 30nm) – …


Download ppt "Occurrence and potential effects of microplastics in the Belgian coastal area By: ir. S. De Meester M. Claessens."

Similar presentations


Ads by Google