Difference between revisions of "Half-life"

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{{Definition|title=Half-life (of a pollutant)
 
{{Definition|title=Half-life (of a pollutant)
 
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|definition=
1)The time required for a [[pollutant]] to lose one-half of its original concentration. For example, the biochemical half-life of DDT in the environment is 15 years.
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1)The time required for a [[pollutant]] to lose one-half of its original concentration. For example, the biochemical half-life of [[DDT]] in the environment is 15 years.
 
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2)The time required for the elimination of half a total dose from the body.
 
2)The time required for the elimination of half a total dose from the body.
 
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Latest revision as of 12:47, 26 August 2009

Definition of Half-life (of a pollutant):
1)The time required for a pollutant to lose one-half of its original concentration. For example, the biochemical half-life of DDT in the environment is 15 years.

2)The time required for the elimination of half a total dose from the body.

This is the common definition for Half-life (of a pollutant), other definitions can be discussed in the article