Teledyne Leeman Labs Blog

Mercury Determination in Tuna – a Thorough Analysis

Posted by Betsey Seibel on Jan 24, 2017 9:00:00 AM

The proliferation of mercury in fish is a well-documented environmental problem. Mercury accumulates in fish tissue from natural and anthropogenic source in bodies of water where the fish live. The microorganisms at the base of the aquatic food change convert the elemental mercury into organic methylmercury, which binds tightly to the proteins in fish tissue.

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Tags: Hg analysis

Could Remediated Ammo Manufacturing Site in Ohio be New Home to Luxury Apartments?

Posted by Betsey Seibel on Sep 27, 2016 2:43:48 PM

An abandoned ammo factory in Kings Mill, Ohio is on the EPA list as one of the most contaminated sites in the country. The site, once home to the Peter’s Cartridge Company, could be the new home to luxury apartments and commercial office space overseeing the Little Miami River. The $25 million plan, which includes 120-130 apartments and 23,000 square feet of commercial space, is dependent on whether the site can be remediated from the mercury, copper and lead that has contaminated the soil for more than a century.

 

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Tags: Hg analysis

Urban House Dust and Mercury Contamination

Posted by Betsey Seibel on Oct 26, 2015 5:41:06 PM

Soil and dust in homes often become the primary resting places for environmental toxins such as metals and metalloids that come from vehicle traffic and a variety of industrial sources. Residents within urban settings have a higher rate of exposure to contaminated dust from inhalation, ingestion and dermal contact. As a result, dust ingestion is often regarded as the primary source of low-dose mercury in urban children who spend much of their time indoors.

 

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Tags: Hg analysis

Are Atmospheric Mercury Levels Getting Better?

Posted by Betsey Seibel on Sep 28, 2015 10:00:00 AM

Since the 1970s, scientists have analyzed lake sediment and ice cores to understand the levels of historical atmospheric mercury emissions from metal production and industrial activity. Much of the published ice core mercury record has come from a glacier in Wyoming.  While the record has been cited extensively in scientific literature, many modern day scientist argue that it does not truly represent the global trends in atmospheric mercury levels.

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Tags: Hg analysis

Mistake leads to need for Mercury level analysis in river

Posted by Betsey Seibel on Sep 25, 2015 12:53:48 PM

The Animas River is a 125-mile river in the western United States that feeds the Colorado River. On August 5, 2015, a crew from the U.S. Environmental Protection Agency (EPA) was pumping out water from the abandoned Gold King Mine in Southern Colorado when heavy equipment used by the workers caused a leak.  

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Tags: Hg analysis

Are Mercury Levels Rising in Pacific Tuna?

Posted by Betsey Seibel on Apr 14, 2015 11:20:00 AM

When researchers began analyzing fish off of the coasts of Hawaii for mercury contamination, they discovered an alarming trend. In a study published in the journal, Environmental Toxicology & Chemistry, researchers found that levels of mercury are rising at roughly 4 percent per year in commercially captured fish, particularly tuna. The data suggests that the mercury levels are rising because of human activity, and at this current rate, mercury concentrations off the coast of the North Pacific could double by 2050.

In a statement, the lead author of the study, Paul Drevnick, from the University of Michigan Biological Station and School of Natural Resources and Environment, said, “The take-home message is that mercury in tuna appears to be increasing in lock-step with data and model predictions for mercury concentrations in water in the North Pacific.”

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Tags: Hg analysis

Is Mercury Exposure Causing Autoimmune Diseases?

Posted by Betsey Seibel on Apr 6, 2015 11:20:00 AM

Mercury is a naturally occurring metal that when it combines with other elements can create inorganic or organic compounds that may be harmful to humans. In water or soil, mercury may combine with microscopic organisms and convert to methymercury, which can accumulate in fish and shellfish. Mercury poisoning has long been associated with brain and kidney damage. New research in the February issue of Environmental Health Perspectives has uncovered that the mercury found in some seafood may pose additional threats, including autoimmune disorders among women during their childbearing years.

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Tags: Hg analysis

Mercury contamination in Lake Onondaga – Part 3

Posted by Betsey Seibel on Apr 1, 2015 11:20:00 AM

The Resurgence of Onodaga Lake - Part 2

This is part three of the Onondaga Lake story. In part two, we outlined what happened once rescue efforts started in the 1970s with new laws and standards that helped to drive change in and around the lake. In this post, we want to focus on what happened after Onondaga Lake was declared a Superfund site in December 1994, and after the signing of an historic agreement in 1998 among the county and various government entities that helped reduce phosphorus and ammonium discharges from the city’s waste treatment plant. It was shortly after this agreement that the water quality started to improve, giving the community a reason for optimism.

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Tags: Hg analysis

Mercury contamination in Lake Onondaga – Part 2

Posted by Betsey Seibel on Mar 25, 2015 11:20:06 AM

The Resurgence of Onodaga Lake - Part 2

This is part two of the Onondaga Lake story, one of prosperity, pollution and revival.  In part one, we documented the collapse of the lake, detailing the years of pollution from the municipal sewage plant and surrounding factories. In this post, we will focus on what happened once rescue efforts started in the 1970s until the 21st century.

As we described in part one of this story, in the 1800s, Onondaga Lake was home to resorts, amusement parks and beaches. Over time, the lake became a dumping ground for waste. One of the company’s along the lake produced soda ash beginning in 1884. “Roughly 6 million pounds of salty wastes, made up of chloride, sodium and calcium were discharged daily to Onondaga Lake from the soda ash facility before it closed in 1986.”[i] And from 1946 to 190, experts estimate roughly 165,000 pounds of mercury were also dumped in the lake.

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Tags: Hg analysis

Mercury Levels in Nation’s Watersheds still need to be reduced

Posted by Betsey Seibel on Jan 13, 2015 11:09:30 AM

A report by the United States Geological Survey has taken an in-depth look at the level of mercury contamination in America’s streams. The national assessment, Mercury in the Nation’s Streams—Levels, Trends, and Implications, has found unhealthy mercury levels in 25 percent of streams with the highest concentrations in the southeast and the west. The contamination in these regions is attributed in part to the degradation caused by historic mining activities.

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Tags: Hg analysis