Friday, December 2, 2011

Beryllium


1.)    Beryllium is a hard, grayish element that does not occur naturally. The element does occur as a chemical component of certain rocks, coal and oil, soil, and volcanic dust. Two kinds of mineral rocks, bertrandite and beryl, are mined commercially for the recovery of beryllium. Very pure gem-quality beryl is better known as either aquamarine (blue or blue-green) or emerald (green). Beryllium is also present in a variety of compounds.
 
2.)    Beryllium enters the air, water, and soil as a result of natural and human activities. Emissions from burning coal and oil increase beryllium levels in air. Beryllium enters waterways from the wearing away of rocks and soil. Most of the man-made beryllium that enters waterways comes when industry dumps waste water and when beryllium dust in the air from industrial activities settles over water. Beryllium, as a chemical component, occurs naturally in soil; however, disposal of coal ash, incinerator ash, and industrial wastes may increase the concentration of beryllium in soil.

In air, beryllium compounds are present mostly as fine dust particles. The dust eventually settles over land and water. Rain and snow aid in the removal of beryllium from air. Sufficiently small beryllium particles may remain airborne for about 10 days.

Most of the beryllium in water settles in the material on the bottom. Beryllium compounds remain in ocean water for a few hundred years before settling to the bottom of the ocean

OSHA requests information and comment on issues related to occupational exposure to beryllium, including current employee exposures to beryllium; the relationship between exposure to beryllium and the development of adverse health effects; exposure assessment and monitoring methods; exposure control methods; employee training; medical surveillance for adverse health effects related to beryllium exposure; and other pertinent subjects. The information received in response to this document will assist the Agency in determining an appropriate course of action regarding occupational beryllium exposure.

3.)    Chronic Beryllium Disease (CBD)
  • Chronic beryllium disease (CBD) occurs when people inhale beryllium dust or fume and can take anywhere from a few months to 30 years to develop. CBD is caused by an immune system reaction to beryllium metal, with symptoms such as persistent coughing, difficulty breathing upon physical exertion, fatigue, chest and joint pain, weight loss, and fevers.
  • Middleton, D.C. "Chronic beryllium disease: uncommon disease, less common diagnosis." Environmental Health Perspectives 106.12(1998). Discusses methods to diagnose chronic beryllium disease (CBD).
  • Newman, L.S., et al. "The natural history of beryllium sensitization and chronic beryllium disease." Environmental Health Perspectives 104.S-5(1996). Reviews what was known about the natural history of clinical chronic beryllium disease (CBD) in the era that preceded the use of immunologic markers, review data from recent studies of patients with beryllium sensitization and early disease, and summarize the methodology being used in ongoing longitudinal studies designed to address some of the questions listed above.
Acute Beryllium Disease (ABD)
  • Acute beryllium disease (ABD) rarely occurs in modern industry due to improved industrial protective measures designed to reduce exposure levels. ABD is caused by breathing in relatively high concentrations of beryllium in dust and metal fumes (>100 µg/m3). High level exposures may lead to death or respiratory illness similar to pneumonia or bronchitis. Symptoms associated with ABD include difficulty breathing, cough, and chest pain. These symptoms occur much more rapidly than those associated with chronic beryllium disease (CBD).
  • Lang, L. "Beryllium: A Chronic Problem [6 MB PDF, 6 pages]." Environmental Health Perspectives 102.6-7(1994). Reviews the causes of acute beryllium disease (ABD).
Lung Cancer
  • Beryllium and beryllium compounds are known to be human carcinogens according to the most recent Report on Carcinogens (RoC). US Department of Health and Human Services (DHHS), Public Health Services, National Toxicology Program (NTP). Provides a table of contents with links to sections of the report.
4.)    It can cause it to be released into the air, soil and water through human activity

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