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Nanomaterials in the Ecosystem: Should we worry?

Date post:12-May-2015
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Nanotechnology has the enormous potential to change our society. New advances in medicine, energy production, environmental cleanup and better access to clean water are just a few of the many possibilities. According to the Project on Emerging Nanotechnologies, the number of products that use nanomaterials has increased almost 380% since 2006. But, is it the same special properties that make nanoscale materials so useful that also pose potential risks to humans and the environment? Dr. Emily Bernhardt from the Center for the Environmental Implications of NanoTechnology discussed with us the fate of nanomaterials in our environment and why you should care.
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  • 1.Nanomaterials in Ecosystems:Should we worry? Dr. Emily Bernhardt Assistant Professor of Biology at Duke University Tonight!@ 7pm Cold beer. Hot food. Cool Science. Fan us on Facebook

2. But I am not afraid to consider the final question as to whether, ultimately---in the great future---we can arrange the atoms the way we want; the very atoms, all the way down! What would happen if we could arrange the atoms one by one the way we want them? Up to now, we have been content to dig in the ground to find minerals. we must always accept some atomic arrangement that nature gives us. What would the properties of materials be if we could really arrange the atoms the way we want them?Physicist Richard Feynman Theres Plenty of Room at the Bottom December 1959 3. What is a nanoparticle? An engineered nanoparticle may be defined as any intentionally produced particle that has a characteristic dimension from 1 to 100 nm and has properties that are not shared by non-nanoscale particles with the same chemical composition. 4. What is a nanoparticle? An engineered nanoparticle may be defined as any intentionally produced particle that has a characteristic dimension from 1 to 100 nm and has properties that are not shared by non-nanoscale particles with the same chemical composition. 5. Nanoparticles are ubiquitous in nature Geobacter sulfurreducensexpressing pilli Nanoparticulate Iron oxides in Washington, D.C. drinking water Cellulose nanofibrils in maize (2x2m) Organisms have evolved in systems full of nanomaterials 6. Nanoparticles are ubiquitous in nature 7. 8. What is a nanoparticle? An engineered nanoparticle may be defined as any intentionally produced particle that has a characteristic dimension from 1 to 100 nm and has properties that are not shared by non-nanoscale particles with the same chemical composition. 9. 10. What is a nanoparticle? An engineered nanoparticle may be defined as any intentionally produced particle that has a characteristic dimension from 1 to 100 nm and has properties that are not shared by non-nanoscale particles with the same chemical composition. 11. Titanium dioxideNanoparticles CarbonNanotubes Quantum Dots 12. Nanomaterials are ubiquitous in nature Manufactured Iron oxide nanoparticles Carbon nanotube superthread ZnO nanowires Geobacter sulfurreducensexpressing pilli Nanoparticulate Iron oxides in Washington, D.C. drinking water Cellulose nanofibrils in maize (2x2m) 13. # of consumer products containing NPs From the Project on Emerging Technologies 14. Nanomaterials, good for the environment? 15. Nanomaterials, good for the environment? 16. Nanomaterials, good for the environment? 17. Nanomaterials, good for the environment? 18. Nanomaterials, good for the environment? 19. How can we provide accurate predictions of the fate and impact of novel compounds in natural environments? 20. 21. 22. Sondi & Sulapek-Sondi 2004 23.

  • E. coliEcosystem

24.

  • How can Nanoscale materials have ecosystem scale effects?
  • 1. Through direct effects on microbes, algae or plants
  • 2. Through transmission & biomagnification of nanoparticles through food webs

25. Nanosilver effects on streamwater microbes Work by Ben Colman 26. Effect of nanosilver onLolium multiflorum Work by Liyan Yin 27. Gold (Au) Nanoparticles in foodwebs Images from Jason Unrine, Lee Newmanand Paul Bertsch (CEINT, University of Kentucky) Control Exposed (3.5 nm Au) New evidence for trophic transfer & bioaccumulation intobacco hornworms 28. Test TubeEcosystem 29. Biosolid + Ag nanoapplication to fieldwetland microcosms 30. 31. Biosolid + Ag nanoapplication to fieldwetland microcosms Prototype slantboard wetland mesocosm With real time environmental monitoring 32. Q: How should nanomaterials be regulated to maximize potential while minimizing unintended consequences? Q&A Fan us on Facebook Cold beer. Hot food. Cool Science.

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