Let’s talk about nanomaterials. They are materials that are composed of units that are thousands of times smaller than the thickness of a human hair. You may have heard of them being developed for computers or medical applications. Now scientists are trying to use them to target some planet-sized issues. The big three on the list are global warming, water pollution, and waste management.
According to a report on the environmental website Ensia, researchers are working on reducing atmospheric CO2 levels with what they call nanoCO2 harvesters. These harvesters can suck in the atmospheric carbon dioxide and then deploy it for industrial purposes.July 17th Chinese waste officials announced that in response to increasing quality concerns, by the end of the year a very large part of America’s MSW exports would no longer be accepted. Considering that waste materials account for a third of America's exports and lie at the heart of the country's recycling efforts, the effects of the Chinese initiative are bound to be far-reaching. So what are our options? Join us for a free webinar panel discussion with experts from ISRI, SWANA, CalRecycle and Waste Management at 10:00a.m. PST, 1:00 p.m. EST, September 19 as they talk about the impacts and our options for dealing with them.
Arun Chattopadhyay is a member of the chemistry faculty at the Center for Nanotechnology, Indian Institute of Technology, Guwahati and has been working with nanomaterials to tackle environmental pollutants for more than a decade. He says, “Nanomaterials can convert carbon dioxide into useful products like alcohol. The materials could be simple chemical catalysts or photochemical in nature that work in the presence of sunlight.”
Nanomaterials are similarly being tested to see how effective they are at absorbing water pollutants. Researchers are working using them to remove toxic dyes, arsenic, lead, chromium, and mercury from water. Check out this video that shows how nanotubes can soak up oil in water.
So what can nanomaterials do to help manage solid waste? One major application would be using nanoparticles to accelerate anaerobic digestion. It would make the production of biogas faster and more efficient. Not only that, recent research has shown that you can double the amount of biogas produced by adding non-toxic, metal oxide nanoparticles to the digester.
It all sounds extremely promising and exciting. We just need to see what the long-term effects of nanomaterials in the environment are, if any, on people.