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  • 2011-01-10 11:45:00
  • Article ID: 572297

Trapped Sunlight Cleans Water

Trapped Sunlight Cleans Water

EMBARGOED FOR RELEASE until 9:00 a.m. Eastern Time (U.S.) on Jan. 11, 2011

For more information, please contact:

Jason Socrates Bardi, +1 301-209-3091, jbardi@aip.org

Washington, D.C. (January 11, 2011) -- High energy costs are one drawback of making clean water from waste effluents. According to an article in the journal Biomicrofluidics, which is published by the American Institute of Physics, a new system that combines two different technologies proposes to break down contaminants using the cheapest possible energy source, sunlight. Microfluidics – transporting water through tiny channels -- and photocatalysis -- using light to break down impurities – come together in the science of optofluidics.

"These two technologies have been developed in parallel but there have been few efforts to employ the natural synergy between them," says author Xuming Zhang of the Hong Kong Polytechnic University. "Our results showed a dramatic improvement in the efficiency of the photocatalyst."

The researchers fabricated a planar microfluidic reactor, or microreactor, which is essentially a rectangular chamber made of two glass plates coated with titanium dioxide, the active ingredient in many sunscreen lotions. On exposure to sunlight, the coating releases electrons that react with contaminants in the water and break them down into harmless substances. This is the photocatalysis part of the process. The high surface area of the microreactor enhances the ability of the catalyst to capture sunlight. Although the gap between plates is small, Zhang plans to expand the rectangular dimensions to two square meters. "Our current small-scale proves the concept but we are also scaling up the reactor to a throughput of 1,000 liter per hour," he says. If the larger reactor proves effective, many parallel devices might be used to handle industrial water treatment applications.

The article, "Optofluidic planar reactors for photocatalytic water treatment using solar energy" by Lei Lei, Ning Wang, Xuming Zhang, Qidong Tai, Din Ping Tsai, and Helen L. Chan appears in the journal Biomicrofluidics. See: http://link.aip.org/link/biomgb/v4/i4/p043004/s1

Journalists may request a free PDF of this article by contacting jbardi@aip.org

BIOMICROFLUIDICS

Biomicrofluidics is an online open-access journal published by the American Institute of Physics to rapidly disseminate research in elucidating fundamental physicochemical mechanisms associated with microfluidic and nanofluidic phenomena as well as novel microfluidic and nanofluidic techniques for diagnostic, medical, biological, pharmaceutical, environmental, and chemical applications. See: http://bmf.aip.org/. See: http://bmf.aip.org/

ABOUT AIP

The American Institute of Physics is a federation of 10 physical science societies representing more than 135,000 scientists, engineers, and educators and is one of the world's largest publishers of scientific information in the physical sciences. Offering partnership solutions for scientific societies and for similar organizations in science and engineering, AIP is a leader in the field of electronic publishing of scholarly journals. AIP publishes 12 journals (some of which are the most highly cited in their respective fields), two magazines, including its flagship publication Physics Today; and the AIP Conference Proceedings series. Its online publishing platform Scitation hosts nearly two million articles from more than 185 scholarly journals and other publications of 28 learned society publishers.

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Cold and Bubbly: The Sensory Qualities that Best Quench Thirst

New research from the Monell Center finds that oral perceptions of coldness and carbonation help to reduce thirst. The findings could guide sensory approaches to increase fluid intake in populations at risk for dehydration, including the elderly, soldiers, and athletes.

J.R. Macdonald Lab receives nearly $8 million DOE grant renewal

MANHATTAN -- A nearly $8 million grant from the U.S. Department of Energy is supporting the "bread and butter" physics research at Kansas State University's James R. Macdonald Laboratory. The grant is a three-year renewal award, "Structure and Dynamics of Atoms, Ions, Molecules and Surfaces." "This big operational grant is our bread-and-butter," said Itzik Ben-Itzhak, university distinguished professor of physics and director of the J.

University contributes art to the new downtown arena

A number of Sac State artworks are joining Jeff Koons' "Coloring Book" in exhibits at the new Golden 1 Center. (Sacramento State/Rob Neep) More photosSac State Professor Rachel Clarke and alumnus Bryan Valenzuela check out the installation of Valenzuela's "Multitudes Converge" glass sculpture at the Golden 1 Center.

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New Method for Reporting Solar Data

A straightforward new way to calculate, compile, and graphically present solar radiation measurements in a format that is accessible to decision makers and the general public has been developed by researchers at the University of Texas at Austin and is described in the Journal of Renewable and Sustainable Energy.

Trapped Sunlight Cleans Water

High energy costs are one drawback of making clean water from waste effluents. According to an article in the journal Biomicrofluidics, a new system that combines two different technologies proposes to break down contaminants using the cheapest possible energy source, sunlight.

Report: Policies to Spur Renewable Energy Can Lower Energy Costs

The South could pay less for its electricity in 20 years than is currently projected if strong public policies are enacted to spur renewable energy production and use, according to a report released today by researchers at the Georgia Institute of Technology and Duke University.


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Citi Grant Helps University Students Succeed

Citi Community Development, part of the Citi family of businesses, supports an innovative Academic Success Program at South Dakota State University. The program is designed to help students who have been re-admitted to SDSU following suspension due to low academic achievement.

Iowa State Engineer and Goodrich Partner to Develop Fuel Nozzles

Hui Hu, an Iowa State University associate professor of aerospace engineering, is working with engineers from the Goodrich Corp. to test and characterize the next generation of fuel nozzles.

CSB to Hold Public Hearing Tomorrow, December 15, as Part of the CSB Deepwater Horizon Investigation

CSB Board Will Hear Testimony on how Offshore Drilling is Managed and Regulated in Other Countries

Cornell Joins Team Taking Head-first Plunge Into Algae Biofuels

Cornell University researchers have joined other scientists and a biofuel research company on a mission to develop a commercial-scale algae-to-fuel facility by 2015. The effort is backed by a $9 million award from the U.S. Department of Energy.

Engineering Researchers Partner With Toyota; DOE Grant Will Further Work Toward a More Efficient Charger for Hybrid-Electric Vehicles

A $3.9 million award from the U.S. Department of Energy will allow electrical engineering researchers at the University of Arkansas to continue contributing to the development of a compact and highly efficient silicon-carbide charger for hybrid electric vehicles. The benefits of the project extend beyond vehicles into other areas, such as wind and solar power, and could lead to reduced energy consumption in the United States.

Research Looks at Alternative Power for Military

South Dakota State University has a major role in a $10 million project to deliver alternative power technologies to help the U.S. military supply power to units in the field. The three-year project began in May 2009.

Mixing Blood and Oil: Conference Tackles Similar Challenges from Two Major Industries

Scientists and engineers from two of the nation's largest industries - medicine and energy - came together this week to explore the synergies in moving oil and pumping blood.

Time Ripe to Move Energy Storage Idea Off Drawing Board

Need has caught up with Case Western Reserve University researcher Gerhard Welsch's design for a self-healing, high-energy capacitor he patented a decade ago. ARPA-E has granted Welsch $2.25 million to start producing the small and lightweight device for hybrid and electric cars and more.

Registration Open for Sandia-Sponsored 4th International Conference on Integration of Renewable and Distributed Energy Resources

Registration is open for the 4th International Conference on the Integration of Renewable and Distributed Energy Resources, the premier event for technical discussion of electric integration of new energy resources.

Advanced Energy Conference To Illuminate Latest Technologies For 21st Century Clean Energy Economy

Leading Energy Organizations to Highlight Latest Job-Producing Energy Technologies at Nov. 8-9 Conference in N.Y.C.


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