Nanoparticles in Sunscreen Damage Microbes

Van Mensvoort
August 24th 2010

Nanotechnology has been hailed for its benefits because of the potential ability to create drugs that could cure cancer and radiation poisoning, make miniature pollutant filters resulting in healthier air and even produce better tasting food. Excitement over these benefits has led to corporations heavily investing in the technology for their products.

However, the same properties that allow nanotechnology to be valuable give it the potential to cause unforeseen consequences for ecological and human health. To date, it’s unclear whether the benefits of nanotech outweigh the risks associated with environmental release and exposure to nanoparticles.

Environmental Health News reports that nanoparticles in sunscreens, cosmetics and hundreds of other consumer products may pose risks to the environment by damaging beneficial microbes.

Researchers Cyndee Gruden and Olga Mileyeva-Biebesheimer from the University of Toledo added varying amounts of nanoparticles to water containing bacteria. The bacteria were grown in a lab and stained with a green fluorescent. It turned out the nano-titanium dioxide – also used in personal care products – reduced biological roles of bacteria after less than an hour of exposure. The findings suggest that these particles, which end up at municipal sewage treatment plants after being washed off in showers, could eliminate microbes that play vital roles in ecosystems and help treat wastewater. Oops!

Nanotechnology is yet another example of mankind playing with fire: It requires enormous care and restraint, yet on the other hand, playing with fire is perhaps one of the very special abilities that defines us as humans.

Via: Environmental Health News.

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Posted 31/08/2010 – 12:23

titanium dioxide kills microbes itself, by my own experience. it is not necessary to be nano-titanium dioxide. I had discussions about it with some scientists who claim it is safe, but I have different experience, at least it really change the micro-surrounding in which microbes live, and so change their possibilities. titanium dioxide is very often added to many cosmetic products.

Yasaman Sheri
Posted 25/08/2010 – 12:44

This is what I always worry about. There is so much that we don't know that can really screw up a system that we create artificially, which will come back and bite us back. Nanotechnology and biotech are examples of humans thinking once again, we know everything. When we don't. And never will.
The only reason Nano and biotech look attractive is because of the problems we have with current technologies and systems, and although they become potential for a better system... they also make the fire bigger and bigger because we dip our hands deeper and deeper...
Yes, perhaps playing with fire indeed is one of the very special abilities that defines as humans.

Should men be able to give birth to children?

Joyce Nabuurs: To me this question seems to be a logical next step in the emancipation movement of the past century. More and more women entered the workspace, but the responsibility for pregnancy and childrearing remained female.

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