Hiển thị các bài đăng có nhãn Contamination. Hiển thị tất cả bài đăng
Hiển thị các bài đăng có nhãn Contamination. Hiển thị tất cả bài đăng

Thứ Hai, 25 tháng 3, 2013

Peru declares Amazon oil contamination emergency

LIMA, Peru (AP) — Peru's government declared an environmental state of emergency on Monday in a remote Amazon jungle region it says has been affected by years of contamination at the country's most productive oil fields, which are currently operated by Argentina-based Pluspetrol.

Indigenous groups in the Pastaza River basin near the Ecuador border have been complaining for years about the pollution and the failure of successive governments to address it. Authorities say one reason the pollution was never addressed is that until now Peru lacked the requisite environmental quality standards.

In declaring the emergency, Peru's Environment Ministry said the contamination included high levels of lead, barium and chromium as well as petroleum-related compounds. The region is inhabited mostly by the Quechua and Ashuar, who are primarily hunter-gatherers.

The fields have been operated for roughly 12 years by Pluspetrol, the country's biggest oil and natural gas producer, and it will be obliged to clean up the contamination, said Environment Minister Manuel Pulgar-Vidal.

But the government also made clear that the field's previous operator, Occidental Petroleum, had not adequately remediated contamination either. It began drilling there in 1971. Pluspetrol took over in 2001.

The 90-day emergency orders immediate action to reduce the risk of contamination to the local population. It follows an $11 million fine levied against Pluspetrol in January.

"We know that there has been bad environmental behavior by the company," Pulgar-Vidal said of Pluspetrol in a radio interview. "If indeed at some point remediation was done, it was not done adequately and that includes inadequate action by the authorities from 2003-2005."

Pluspetrol did not immediately respond to telephone calls and email messages requesting comment.

Pulgar-Vidal did not describe the extent of the contamination or estimate what it would cost to clean up.

His ministry said in a statement posted on its website that the government began administrative actions against Pluspetrol in March 2012 over contamination at block 1AB, long Peru's biggest crude oil field.

The president of the Quichua Federation of Pastaza, Sixto Shapiama, hailed the emergency as "a great achievement because for many years, decades, the government never wanted to see the reality."

The area has for decades seen "constant (oil) spills," said Shapiama from the regional capital of Iquitos, adding that "the sediment at the bottom of the river is completely contaminated."

The Peruvian TV news magazine Panorama showed Reps. Marisol Perez Tello and Veronika Mendoza visiting crude-permeated rivers and ponds in the area as well as the deteriorating oil pipeline that pumps crude to the Pacific coast.

"The government is to blame because it has permitted this," Perez said Monday.

It published on Monday, for the first time, environmental quality standards setting acceptable limits for contaminants in soil. Peru didn't have an environment ministry until 2008 and the mining and energy ministry remains in charge of approving environmental impact statement for the extractive industries.

The investigative weekly "Hildebrand en sus Trece" reported in 2010 that Pluspetrol had 78 oil spills in the region from 2006-2010, and Shapiama blamed the spills for ailments including birth defects and spontaneous abortions.

A British religious activist who has worked with the affected indigenous populations, Paul McAuley, told The Associated Press in 2010 that he was astounded word of the contamination had hardly spread outside the jungle.

He said not just the Pastaza, but two other river basins where Pluspetrol has oil fields, are contaminated: The Corrientes and the Tigre. All are tributaries of the Amazon.

McAuley, a lay activist with the La Salle Christian Brothers, founded the Loreto Environmental Network in 2004 to support the indigenous groups in their struggle to end the pollution.

In 2010, Peru's government tried to expel McAuley, alleging he was inciting unrest among the indigenous.

His expulsion, challenged by the Roman Catholic Church and groups including Amnesty International, was eventually halted by a judge.

Alan Garcia, as president from 2006-2011, opened up the Amazon to unprecedented mining and oil exploration and drilling. Current President Ollanta Humala has faced a backlash in the form of growing protests.

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Frank Bajak on Twitter: http://twitter.com/fbajak


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Thứ Hai, 11 tháng 3, 2013

Potential New Antarctica Bacteria Actually Contamination

Late last week, a Russian news outlet reported that scientists at Antarctica's Lake Vostok, buried under miles of ice, said they had found bacteria that appeared to be new to science. Now, the head of that lab has said the signature is actually just contamination, leading outside researchers to say that the Russian team rushed too quickly to announce the possibility of new bacterial life.

Russian news media reported last week that the team had found DNA from a microbe that did not appear in databases and is only 86 percent similar to others on Earth — considered a reliable threshold of new life.

On Monday (March 11), the lab analyzing the finding said it was not new bacteria that generated the signal, but contamination.

"We found certain specimens, although not many. All of them were contaminants," laboratory head Vladimir Korolyov said in a quote attributed in media reports to the Interfax news agency.

The quick backtrack illustrates the danger of bypassing peer review when announcing new results, Peter Doran, an Arctic and Antarctic researcher at the University of Illinois at Chicago, told OurAmazingPlanet.

'You can say anything you want in a press release'

Peer review is the scientific process that all findings must undergo before work is published, generally in the form of a paper in a scientific journal. The research comes under the scrutiny of other scientists in the field and is validated and questioned before anything goes to print. That's not the case in a news report.

For that reason, the scientists who OurAmazingPlanet spoke with said that it was hard for them to discuss why the Russians failed since they do not even know, for example, what contaminates were found in the lab. That information could take weeks or months to surface.

"You can say anything you want in a press release," Doran said. "The peer review literature [by contrast] is very controlled. It needs to be substantiated, and written in clear language."

"I tell my students," he continued, "don't trust anything you read in the popular press. Even if there is a paper, there's often a disconnect between what is in the paper and in the popular press."

Peer review, however, can take years, acknowledged David Pearce, a researcher with the British Antarctic Survey who worked on a similar British effort to drill into buried Lake Ellsworth. (That effort failed and is being subject to a review board. The results should be published around May, at which point the British will decide whether to try again.) [Extreme Antarctica: Amazing Photos of Lake Ellsworth]

Taxpayers are often impatient to find out what is going on, Pearce said, and the press works to fill that need. A balance must be struck between these needs, he added.

"It's important [the public] is kept informed of what's going on, and the interesting things that are coming out," Pearce said. Science, by contrast, requires time and careful thought.

"You do want to find out what's happened to the research money," he added, "but you don't want to say too much too soon."

Sterilization part of best practice

The Russian researchers not only faced challenges concerning announcing their findings, but also scientific challenges in their quest to discover life.

It's still not known what kind of life, if any, lies below the 2 miles (3 kilometers) of ice that sits on top of Lake Vostok. As far as researchers know, the underground freshwater has been lying there untouched for more than a million years.

Confirming that any possible signature of life is not a contaminant is complicated, to say the least.

There's a strict protocol the Americans strive to follow in Antarctica, said Doran, who is familiar with the practices of the U.S. Whillans Ice Stream Subglacial Access Research Drilling project (WISSARD) team that worked this year at Antarctica's Lake Whillans.

Doran could not speak specifically to the Russians, but said the American work demonstrates a good methodology.

In WISSARD's case, it involves sterilizing all the equipment with hydrogen peroxide gel or a similar product, then hermetically sealing them in bags for shipment. Scientists on-site sterilize the water in the drill system through several steps that include filters and life-killing ultraviolet radiation.

As the drill progresses through the ice, the scientists monitor cell counts to make sure there are no unexplained jumps.

WISSARD recently announced life findings of its own, but Doran was equally skeptical of that until a paper comes out confirming the work. [Gallery: Finding Life in a Buried Antarctic Lake]

To the WISSARD announcement, Doran said, "I understand how it happened. There are embedded reporters in the field with them. They are sitting around the dinner table together, and drinking Scotch together, and the reporters are right there [when scientists say] 'Our cell counts are way up when we've gone into the lake water.'"

"Of course that gets reported, but without the peer review literature, it's still a violation of how the standard things are done," Doran said.

Follow Elizabeth Howell @howellspace. Follow OurAmazingPlanet @OAPlanet, Facebookand Google+.

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