Study shows that sunlight intensifies the impacts of PAHs
By Summit Voice
FRISCO — In yet another sign that BP’s spilled Deepwater Horizon may have long-lasting impacts on Gulf ecosystems, a team of researchers said last week that even low-level, short-term exposure to traces of oil remnants causes deformities and impairs the swimming ability of fish.
PAH’s are toxic components of oil that are released from oil into the water column. The team also studied the effects of photo-enhanced toxicity, or the impact of sunlight on the potency of the toxic compounds found in the oil from the DWH spill.
“We found that in more sensitive species the photo-enhanced toxicity could account for up to a 20-fold higher sensitivity,” said Dr. Martin Grosell, professor and associate dean of graduate studies for the Rosenstiel School. “This is an important part of the equation because it means that traditional toxicity testing performed under laboratory conditions will tend to underestimate the toxicity that might have occurred in the natural environment under the influence of sunlight,” he added. Continue reading “Environment: Traces of Deepwater Horizon oil cause deformities, swimming deficiencies in Gulf fish”→
Research show that carcinogenic oil-related PAH compounds are easily absorbed through skin
By Bob Berwyn
SUMMIT COUNTY — Two years after the Deepwater Horizon oil disaster, beaches along the northern Gulf of Mexico coastline are far from being clean, says University of South Florida researcher James “Rip” Kirby, who recently documented accumulations of remnant oil with “scary high” concentrations of carcinogenic oil-related compounds. Download the full report or a summary at the Surfrider website.
SUMMIT COUNTY — I spent much of Sunday reading and re-reading a very discouraging study on toxic oil pollution along Gulf Coast beaches. Despite all the chamber of commerce and government propaganda on how well everything has been cleaned up, it turns out that there are alarmingly high levels of carcinogenic oil-related PAHs still accumulating in the shallows all along the northern Gulf Coast, including beaches where our family waded and swam last spring and summer. You can read the story here. Just another reason to try and end our addiction to oil as soon as possible … Continue reading “Morning photo: Beaches”→
Oregon State University findings could spell trouble for food chain
Oregon State University researchers say they’ve measured a 40-fold increase in concentrations of polycyclic aromatic hydrocarbons in parts of the Gulf of Mexico. They suspect the use of dispersants may have intensified the formation of some of the substances.
By Summit Voice
SUMMIT COUNTY — Oregon State University researchers said they’ve detected a troubling increase in concentrations of carcinogenic polycyclic aromatic hydrocarbons, or PAHs, in some areas of the Gulf of Mexico contaminated by the oil that spewed from BP’s failed Deepwater Horizon drilling rig.
In some samples, the levels increased by up to 40 percent from May to June. Subsequent sampling in August continued to show abnormally high levels of PAHs, similar to the 40-fold increase discovered earlier in the summer, said Kim Anderson, a professor of environmental and molecular toxicology in OSU’s College of Agricultural Sciences.