| heavy metals |
Mercury, lead, cadmium, and other heavy metals cannot be metabolized by the body and if accumulated, can cause toxic effects by interfering with various physiological functions. These substances are called "heavy metals," a term applied to metallic elements whose specific gravity is about 5.0 or greater, especially those that are poisonous.
출처: www.thoughtfulhouse.org/0405-conf-glossary.htm
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| heavy metals |
any metal with a specific gravity of 5.0 or greater; especially one that is toxic to organisms; as lead, mercury, copper, chromium, cadmium, etc.
출처: www.eco-tec-inc.com/glossary.html
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| heavy metals |
mostly transition metals, which have great affinity for sulfur, and disrupt enzyme function. Most are toxic, but some, eg iron, are essential for life
출처: eies.njit.edu/~kebbekus/definitions_for_chapter_7....
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| heavy metals |
Heavy metals are naturally occurring elements found in rocks and soils. They are also released to the environment by human activities. They generally do not change into other forms and therefore persist in the environment. Examples of heavy metals are mercury, cadmium and lead.
출처: www.trentu.ca/nwhp/glossary.shtml
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| heavy metals |
Metallic chemicals like cadmium, arsenic, copper and zinc that can be harmful pollutants when they enter soil and water. These chemicals are put into animal feed to help make animals grow faster. Heavy metals are present in human and animal waste and can enter the environment if waste is released without being treated. Animal waste is never treated to remove heavy metals. Once in the environment, heavy metals are almost impossible to get rid of because they do not decompose.
출처: www.sustainabletable.org/intro/dictionary/
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