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Researcher to determine why oil still remains from Exxon Valdez

Some 18 years after the Exxon Valdez ran aground and spilled nearly 11 million gallons of crude oil into Alaska's Prince William Sound, the oil continues to cause environmental problems along some of Alaska's shoreline. To help determine why the oil continues to linger long after experts predicted it would disappear, Temple University has been awarded a three-year, $1.2 million grant by the Exxon Valdez Oil Spill Trustee Council.

"Every indication tells us that the oil should have biodegraded," says Michel Boufadel, chair of Civil and Environmental Engineering in Temple's College of Engineering and the principal investigator for the grant. "But what we've seen is there are still plenty of places where the oil still exists."

According to a recent study published in the journal Environmental Science and Technology, scientists from the National Oceanic and Atmospheric Administration (NOAA), the U.S. Geological Survey and Alaskan agencies found that oil levels in the sands around the sound are much the same as they were when tests were done five years ago. The study says oil has seeped down 4 to 10 inches.

During the next two summers, Boufadel and graduate students will travel to Prince William Sound for 20 days and 50 days, respectively, to conduct field studies, take samples and try to get an understanding of the motion of the water and effects of the waves along the beaches.

"Our goal is to understand what is happening at the oil-water interface, since that is where the biodegradation of oil typically occurs," said Boufadel, an expert in oil spill remediation. "We will be examining the biodegradation from both sides of that interface from inside and outside the oil patches." Boufadel said the researchers currently believe that micro-organisms, which would typically consume the oil, may play a key role in the oil's lack of biodegradation along the beaches.

"You would expect that over 17 to 18 years, the micro-organisms that live
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Contact: Preston M. Moretz
pmoretz@temple.edu
215-204-7476
Temple University
19-Mar-2007


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