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#6046 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Introduction
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Posts: 28,544
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#6047 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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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.
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Posts: 28,544
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#6048 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Very pure gem-quality beryl is better known as either aquamarine (blue or blue-green) or emerald (green).
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Posts: 28,544
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#6049 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Beryllium is also present in a variety of compounds. They do not have any particular smell. There are two types of beryllium compounds, those that dissolve in water and those that do not.
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Posts: 28,544
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#6050 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Most of the beryllium ore that is mined is converted into alloys (mixtures of metals). Most of these alloys are used in making electrical and electronic parts or as construction materials for machinery and molds for plastics. Pure beryllium metal has applications in nuclear weapons and reactors, aircraft and space vehicle structures and instruments, X-ray machines, and mirrors.
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Posts: 28,544
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#6051 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Beryllium oxide is also made from beryllium ores and is used to make specialty ceramics for electrical and high-technology applications.
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Posts: 28,544
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#6052 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Fate & Transport
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Posts: 28,544
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#6053 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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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.
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Posts: 28,544
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#6054 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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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.
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Posts: 28,544
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#6055 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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In air, beryllium compounds are present mostly as fine dust particles. The dust eventually settles over land and water.
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Posts: 28,544
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#6056 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Rain and snow aid in the removal of beryllium from air. Sufficiently small beryllium particles may remain airborne for about 10 days.
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Posts: 28,544
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#6057 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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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.
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Posts: 28,544
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#6058 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Fish do not accumulate beryllium from water into their bodies to any great extent. A major portion of beryllium in soil does not dissolve in water but remains bound to soil, so it is not very likely to move deeper into the ground and enter groundwater. In the environment, chemical reactions can change the water-soluble beryllium compounds into insoluble forms.
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Posts: 28,544
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#6059 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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In some cases, water-insoluble beryllium compounds can change to soluble forms. Exposure to water-soluble beryllium compounds in the environment, in general, will pose a greater threat to human health than water-insoluble forms.
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Posts: 28,544
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#6060 |
legend
Join Date: Oct 2006
Location: Independence, MO
Casino cash: $-3337903
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Exposure Pathways
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Posts: 28,544
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