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Posted: October 23, 2006
Nanotechnology: next big thing, or much ado about nothing?
(Nanowerk News) In less than a decade, nanotechnology is predicted to result in $2.6 trillion in manufactured goods annually. Already, there are over 300 manufacturer-identified nanotechnology-based consumer products on the market—ranging from computer chips to automobile parts and from clothing to cosmetics and dietary supplements. By 2015, over 2 million workers will be making these and other nanotechnology products.
But little is known about potential risks in many areas of nanotechnology—and funding for risk-focused research is a small fraction of what is being spent on nanotechnology commercial applications. Greater resources and attention are needed now in order to ensure safe nano-workplaces today and in the future.
“Because nanotechnology is a way of doing or making things rather than a discrete technology, there will never be a one-solution-fits-all approach for nanotechnology and nanomaterials workplace safety,” states Maynard. “That is why the federal government needs to invest a minimum of $100 million over two years in targeted risk research in order to begin to fill in our occupational safety knowledge gaps and to lay a strong, science-based foundation for safe nanotechnology workplaces.”
According to previous analyses done by Maynard, despite investing more than $1 billion annually on nanotechnology research, current U.S. government spending on highly relevant nanotechnology risk research is only $11 million per year.
In the short term, because of incomplete information, Maynard stresses the need to supplement good hygiene practices in the workplace with nano-specific knowledge. While initiatives such as the ORC Worldwide™ Nanotechnology Consensus Workplace Safety Guidelines, the National Institute for Occupational Safety and Health (NIOSH) “Approaches to Safe Nanotechnology,” and the International Council on Nanotechnology (ICON) “Review of Safety Practices in the Nanotechnology Industry,” provide invaluable resources for working as safely as possible with engineered nanomaterials, Maynard believes we still have a long way to go.
Until more research is available, Maynard proposes developing a “control banding” approach to nanotechnology workplace risk—a course of action that is between inaction and banning all nanomaterials as hazardous. This could involve selecting appropriate control approaches based on a nanomaterial “impact index” centered on composition-based hazard, and perturbations associated with their nanostructure—like particle size, shape, surface area and activity, and bulk-size hazard—and on an “exposure index” representing the amount of material used and its “dustiness.” “This is still very much at the conceptual stage,” says Maynard. “But unconventional problems need unconventional solutions, and these in turn will require a serious investment in relevant nanotechnology risk research.”
“The presence of engineered nanomaterials in the workplace today poses an immediate challenge to how occupational safety and health is managed,” maintains Maynard. “So far, we have a number of ‘red flags’ that indicate some engineered nanomaterials might present a new or unusual health hazard—like recent research done with rodents suggesting that deposited, discrete nanometer-diameter particles are capable of being transported from the nasal region of the respiratory tract to the brain, and circumventing the blood-brain barrier.”
“While it is by no means certain that this particle size-dependent exposure route is significant in humans,” notes Maynard, “we cannot avoid the fact that there is an overwhelming level of uncertainty over which nanomaterials and nanotechnologies present a potential risk, why they do, and how their risk might be assessed and managed effectively. In the long-run, safe nanotechnologies will not become a reality unless these uncertainties are addressed systemically, and this means conducting adequate strategic research.”
Source: Woodrow Wilson International Center for Scholars