Economical technique removes pharmaceuticals, chemical contaminants from public water systems

June 13, 2018, Purdue University
Purdue University researchers developed a series of continuous-flow photoreactors to effectively remove chemical products and compounds from water supplies. Credit: Reynaldo Barreto

As the controversy surrounding the Environmental Protection Agency and water contamination heats up in Washington, D.C., Purdue University researchers have developed a technology to remove pharmaceuticals, including antibiotics and controlled substances, and chemical contaminants from public water systems.

The concern about has been making headlines in the past couple of months as the EPA held a national summit on the issue.

According to Reynaldo Barreto, an associate professor in the Department of Chemistry and Physics at Purdue University Northwest, organic compounds and pharmaceuticals are commonly being found in .

"The effect of these trace contaminants in the supply is unknown," said Barreto, who led a team of undergraduate students to develop the new technology. "Although little is known about the many organic and pharmaceutical compounds, their presence in the water supply, even in trace amounts, poses a real threat to public health."

Barreto and his students developed a series of continuous-flow photoreactors to effectively remove chemical products and compounds, commonly used as solvents and gasoline additives, from water supplies.

The photoreactors are made of glass tubes, with silicone tubing inside for oxygenation, packed with glass beads and lined with the same fluorescent light tubes found in most homes. The tubing is pressurized and then water flows through and the combination of the light, silicone and glass removes the trace contaminants.

"This is arguably the most advanced continuous-flow photoreactor design of its kind in the world and is scalable for municipal system demands," Barreto said. "Our type of reactor system can simply be added to the end of current treatment processes without affecting the existing systems."

Current techniques used to try to remove the contaminants can be costly and time-consuming. The chemical inertness of many of these compounds makes remediation of these chemicals both expensive and difficult to apply to large systems.

"There is currently no effective way to remove these trace compounds from treated water," Barreto said. "This would be the first process that could address these contaminants efficiently and economically."

Explore further: Improved water treatment systems needed to remove contaminants in water

Related Stories

Lasers zap decontaminates from soil

August 29, 2017

There might be a new and improved way to rid contaminated soil of toxins and pollutants: zap it with lasers. By directly breaking down pollutants, researchers say, high-powered lasers can now be more efficient and cheaper ...

Removing heavy metals from water with MOFs

March 14, 2018

An estimated 1 billion people do not have access to clean drinking water, a problem expected to worsen with climate change, according to the World Health Organization. In addition, higher energy needs and increased use of ...

Recommended for you

Evidence of earliest life on Earth disputed

October 17, 2018

When Australian scientists presented evidence in 2016 of life on Earth 3.7 billon years ago—pushing the record back 220 million years—it was a big deal, influencing even the search for life on Mars.

Arctic greening thaws permafrost, boosts runoff

October 17, 2018

A new collaborative study has investigated Arctic shrub-snow interactions to obtain a better understanding of the far north's tundra and vast permafrost system. Incorporating extensive in situ observations, Los Alamos National ...

Arctic ice sets speed limit for major ocean current

October 17, 2018

The Beaufort Gyre is an enormous, 600-mile-wide pool of swirling cold, fresh water in the Arctic Ocean, just north of Alaska and Canada. In the winter, this current is covered by a thick cap of ice. Each summer, as the ice ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.