Mercury: Exposure Through the Food Chain

Large amounts of mercury become airborne when coal, oil, wood, or natural gas are burned as fuel or when mercury-containing garbage, including improperly discarded fluorescent lamps, is incinerated. This mercury can fall to the ground with rain and snow, landing on soil or in bodies of water, causing contamination. Lakes and rivers are also contaminated when there is a direct discharge of mercury-laden industrial and municipal waste into these waterbodies.

Elemental mercury and mercury salts, although fairly inert when deposited on the bottom of waterways, are converted into organic mercury, typically methylmercury, by microorganisms. Methylmercury then enters the food chain, where it is biomagnified up to 100,000 times in predacious fish. Eagles, turtles, mink, otters and other fish-eating creatures may have mercury introduced into their diets, which can cause early death, weight loss, and problems with their ability to reproduce.

Once mercury accumulates in the tissue of fish and other organisms, it may ultimately reach the dinner table, as most common human exposure to methylmercury is through consumption of contaminated fish or animals that eat fish. This mercury vapor, which can be introduced to human systems through consumption or absorbed through the skin or inhaled, can cause neurological damage to adults, children and fetuses. Read more about potential mercury risks.

Brad Buscher
Chairman and CEO
VaporLok Products LLC

Lighting the Workplace with Fluorescent Bulbs

Many businesses strive to keep management expenses low, ensure energy efficiency and provide a safe work environment for employees. When it comes to selecting lighting, all of these aspects must be factored in. Fluorescent lamps have long been the best lighting option for small to large businesses, due to their significant energy savings—providing four to six times higher efficiency than incandescent lights—and long working life. However, these lamps contain hazardous mercury and, from installation to disposal, they must be carefully handled, stored and transported.

While the amount of mercury used in an individual fluorescent bulb has decreased over the past years, one broken four-foot fluorescent lamp in a small room or vehicle can release enough mercury vapor to exceed the OSHA mercury exposure eight-hour limit—posing a significant occupational health risk. Plus, mercury vapor can be emitted for weeks after a single bulb is broken. In their lifetime, fragile fluorescent lamps are handled by manufacturers, transporters, distributors, retailers, consumers and installers, as well as recycling or waste handlers. Although the lamps could break anywhere down this line and expose workers and the environment to hazardous mercury vapors, there are no universally enforced packaging standards designed to protect these people. Recent legislation has begun to address the issue of safe packaging for fluorescent lamps and other mercury-containing products, and businesses must work to not only comply with these regulations, but also ensure the safety of all personnel in addition to protecting the environment.

Brad Buscher
Chairman and CEO
VaporLok Products LLC

Three Layers For a Safe Package

According to a recent study conducted at the University of Minnesota's School of Public Health, most containers used for storage and transportation of used fluorescent lamps to recycling centers do not sufficiently prevent the release of mercury vapor from broken lamps.(1) The results show that a double-box design with a foil-plastic laminate bag with a zip closure bag positioned between the two cardboard layers minimized airborne mercury vapor levels below all current federal and state workplace exposure regulations and guidelines.

Researchers concluded that each of the three layers performs a specific function. The inner cardboard layer prevents the broken glass from puncturing the bag, which contains the vapor. The outer box serves as a protective layer for all contents and also provides structure to the configuration. Packages must contain all three of the layers described above to effectively contain harmful mercury vapor emissions.

REFERENCE
1. Glenz, Tracy T., Lisa M. Brosseau and Richard W. Hoffbeck. “Preventing Mercury Vapor Release from Broken Fluorescent Lamps during Shipping.” Journal of the Air & Waste Management Association, 59 (2009), 266-72.

Brad Buscher
Chairman and CEO
VaporLok Products LLC

Why is it Important to Recycle Used Fluorescent Lamps?

According to EPA estimates, only 20% to 25% of used fluorescent lamps are recycled, These lamps are commonly sent to a recycler in bulk or in pre-paid shipping recycling boxes. The 75% to 80% of fluorescent lamps that are not recycled usually end up in dumpsters or trash containers and, ultimately, in landfills. One study indicates dumpsters that contain broken fluorescent lamps “strongly and persistently” emit mercury.(1) Another study on mercury release from broken fluorescent lamps found that between 17% to 40% of the mercury in broken low-mercury fluorescent lamps is released to the air during the two-week period after breakage.(2) Of this mercury, one-third of the release takes place during the first eight hours following breakage, potentially exposing personnel in the vicinity to unsafe levels of mercury vapor. Using this estimated release rate and an estimated 620 million lamps discarded annually in the United States, broken used fluorescent lamps release approximately two to four tons of mercury each year into the environment.

Used fluorescent lamps need to be properly handled during shipping and recycling. Safe packaging reduces the threat of mercury vapor emitted from broken lamps.

REFERENCES
1. Lindberg, S.E.; Owens, J. PaMSWaD (Pathways of Mercury in Solid Waste Disposal); Lockheed Martin Energy Research Corporation (LMER). 1999, 6.
2. Aucott, Michael, Michael McLinden and Michael Winka. “Release of Mercury from Broken Fluorescent Bulbs.” Journal of the Air & Waste Management Association, 53 (2003), 143-51.

Brad Buscher
Chairman and CEO
VaporLok Products LLC

Future Mercury Waste Regulations: The First Step to a Brighter Future

The U.S. Environmental Protection Agency (EPA) promotes recycling of fluorescent lamps by allowing common carrier shipment to recycling facilities. The federal Universal Waste Rule requires packaging to be compatible with the contents of lamps, structurally sound and adequate to prevent breakage—but this rule does not specifically address mercury vapor release. In 2005, a provision was added that requires packaging for mercury-containing products to be "reasonably designed to prevent the escape of mercury into the environment by volatilization or any other means." However, fluorescent lamps were excluded from this rule.(1)

However, some states are beginning to address the dangers of unsafe packaging and transportation of used fluorescent lamps and mercury containing devices. On March 19, 2010, Washington signed Senate Bill 5543, requiring that lights and other mercury-containing devices are packaged and shipped in material that will minimize the release of mercury into the environment. The law also states that they should include mercury vapor barrier packaging if transported by the United States postal service or a common carrie. This new legislation is set to be the precursor of future state and federal legislation as awareness of mercury vapor dangers increases. Find out more about these types of waste regulations and programs at these United States Environmental Protection Agency Sites.

REFERENCE
1. Standards for Universal Waste Management: Applicability—Lamps. CFR, Part 273.5, Title 40, 2007.

Brad Buscher
Chairman and CEO
VaporLok Products LLC