New method break BPA using nanoparticles, light

New method to break BPA using nanoparticles, light

12:11 PM, 7th November 2014
New method to break BPA using nanoparticles, light
BPA from plastic bottles and other products can degrade with the help of special nanoparticles and sunlight.

WASHINGTON, US: Many pollutants with the potential to meddle with hormones - with bisphenol A (BPA) as a prime example - are already common in the environment. In an effort to clean up these pollutants found in the soil and waterways, scientists are now reporting a novel way to break them down by recruiting help from nanoparticles and light. The study appears in the journal ACS Applied Materials & Interfaces.

Researcher Nikhil R Jana and Susanta Kumar Bhunia explained that the class of pollutants known as endocrine disruptors has been shown to either mimic or block hormones in animals, including humans. That interference can cause reproductive and other health problems. The compounds are used to make many household and industrial products, and have been detected in soil, water and even human breast milk. Scientists have been working on ways to harness sunlight to break down endocrine disruptors to make them less of a health threat. But the approaches so far only work with ultraviolet light, which at a mere 6 per cent of sunlight, means these methods are not very efficient. Jana and Bhunia wanted to find a simple way to take advantage of visible light, which comprises 52 per cent of sunlight.

For inspiration, the researchers turned to an already-developed graphene composite that uses visible light to degrade dyes. They tweaked the composite and loaded it with silver nanoparticles that serve as an antenna for visible light. When they tested it, the new material successfully degraded three different kinds of endocrine disruptors: phenol, BPA and atrazine. They conclude that their composite is a promising way to harness visible light to break down these potentially harmful compounds and other organic pollutants.

 

© American Chemical Society News

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