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Nanomaterialer – udgør de et miljø- og sundhedsmæssigt problem?

Nanomaterialer – udgør de et miljø- og sundhedsmæssigt problem?. Steffen Foss Hansen, Laura Roverskov Heggelund, Pau Revilla Besora, Aiga Mackevica, Alessio Boldrin, Anders Baun. Nanoproducts. Unclear what is on the marked Unclear what consumers are exposed to

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Nanomaterialer – udgør de et miljø- og sundhedsmæssigt problem?

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  1. Nanomaterialer – udgør de et miljø- og sundhedsmæssigt problem? Steffen Foss Hansen, Laura Roverskov Heggelund, Pau Revilla Besora, Aiga Mackevica, Alessio Boldrin, Anders Baun

  2. Nanoproducts • Unclearwhat is on the marked • Unclearwhatconsumersareexposed to • Unclearhowmuchconsumers and the environment is exposed to • Hampers quantitativeconsumerexposureassessment

  3. The Nanoproductdatabase (www.nanodb.dk) • 2012: Initiated ”The Nanodatabase” • DTU Environment • The DK Ecocouncil & The DK Consumer Council

  4. NanoRiskCategorisation

  5. Exposure Effects NanoRiskCat Humans Environment Environment Prof. end-users Consumers

  6. = High = Medium = Low = Unknown

  7. Determining exposure Hansen et al. 2008 Ecotoxicology 17(5):438-447

  8. Examples of determining exposure • TiO2 in sunscreen • C60 lubricants • CNT baseball bats Environment Prof. end-users Consumers

  9. Human effects • NM HARN? • Bulk CLP? • NM Acute tox? • NM associated with: • CMR? • Respiratory tox? • CVD? • Neurotox? • Organ accumulation?

  10. Environmental effects • Bulk CLP? • Bulk LC50< 10 mg/l? • NM LC50< 100 mg/l? • NM T1/2 > 40 days? • NM BCF > 50? • NM dispersive? • NM ecosystem effects? • NM novel?

  11. Human effects Environmental effects CNT - HARN, Ecotox = < 100 mg/l, T1/2 >40 d

  12. Consumers

  13. Environment

  14. Humans

  15. Environment

  16. Do Your Own Analysis!

  17. Limitations • Based on ”nano-claims” • Yes, but we cannot a this point do independent validation • Products are ”all red” • Could seems so, but they turn red for different reasons (HARN vs. CMRs) • Crude hazard assessment • What do you mean? • Crude exposure assessment • Yes, but the producers do not provide information that would enable more detailed exposure assessment

  18. Tools for nanoparticle characterization • Single Particle ICP-MS • Size distribution • Particle number concentration • Particle mass concentration • Dissolved metal concentration • Chemical composition • Transmission Electron Microscopy (TEM) • Particle shape • Agglomeration/aggregation • Size

  19. Silver nanoparticle release from toothbrushes 106 particles/L 106 particles/L http://www.aliexpress.com http://www.beautyofnewyork.com Mackevica et al. (in prep.)

  20. Tiede et al. 2015 Aim • Identified types of NPs likely to reach water sources Method • Derived worst case concentrations of NPs in raw water and treated drinking water • Used simple exposure model Results • Titanium oxide-, zinc- and silicon-based NPs likely to be found in the highest concentrations in treated waste and drinking waters • Carbon-based (C), iron oxide and silver nanoparticles rank in positions 6, 7 and 8, respectively • Worst case predicted concentrations in drinking waters were in the low- to sub-g/l range and more realistic estimates were tens of ng/l or less.

  21. Funding Thank you very much • DK EPA (2010-2011) • Villum Foundation (2012-2014) • EnvNANO (2013-2015) • SUN (2014-2015) • DEFRA This work is part of the project ENVNANO (Environmental Effects and Risk Evaluation of Engineered Nanoparticles) supported by the European Research Council (grant no. 281579). This project has received funding from the European Union’s Seventh Framework Programme [FP7/2007-2013] under EC-GA No. 604305 ‘SUN’

  22. Thank you for your Attention! ?’sfh@env.dtu.dk

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