Heavy Metals
Metallic elements with high atomic weights; (e.g., mercury, chromium, cadmium, arsenic, and lead); can damage living things at low concentrations and tend to accumulate in the food chain.
Source: Terms of the Environment ...
Heavy metals
certain metals, used industrially and harmful to living organisms, for which discharge and emission standards are set; including cadmium, chromium, copper, lead, mercury, nickel, zinc ...
Heavy metals: Metals that have a density of 5.0 or higher and a high elemental weight. Most are toxic to humans, even in low concentrations.
Heavy water: Water in which all the hydrogen atoms have been replaced by deuterium.
Heavy Metals: Lead, Mercury, and Cadmium are toxic heavy metals that are naturally present in rocks and soils. Metal mining and smelting can result in additional human-made releases of mercury and cadmium.
Heavy Metals
Metallic elements with high atomic weights; (e.g., mercury, chromium, cadmium, arsenic, and lead); can damage living things at low concentrations and tend to accumulate in the food chain.
Helminth Worms ...
HEAVY METALS Elements, including cadmium, mercury, lead and arsenic which may be found in the waste stream as part of discarded items (batteries, lighting fixtures, colorants, ink).
Heavy Metals: those metals (elements with high density, malleability, and electrical and thermal conductivity) that have high specific gravity and high atomic mass, such as lead, cadmium, zinc, copper, silver, and mercury.
Heavy metals
A group of elements (such as chromium, lead, copper and zinc) that can be toxic at relatively low concentrations and tend to accumulate in the food chain..
Heptachlor ...
heavy metals. Metallic elements with high atomic weights, e.g., mercury, chromium, cadmium, arsenic, and lead. They can damage living things at low concentrations and tend to accumulate in the food chain.
Heavy Metals: Metallic elements, some of which are required in trace concentrations for plant and/or animal nutrition, but which become toxic at higher concentrations (e.g. lead, mercury).
HEAVY METALS
Metals with high molecular weights that are generally toxic to animal life and human health if naturally occurring concentrations are exceeded. Examples include, arsenic, chromium, lead and mercury.
HEMIC PEAT ...
Chromium: See Heavy Metals.
Chronic Effect: An adverse effect on a human or animal in which symptoms recur frequently or develop slowly over a long period of time.
Serpentine soil Soil formed by the weathering of serpentine rock which contains high concentrations of various heavy metals.
Many other pollutants, including sulfur dioxide, fluoride and heavy metals have been documented to suppress growth and photosynthesis in tree species.
The chemicals and heavy metals used in fireworks also take their toll on the environment, sometimes contributing to water supply contamination and even acid rain.
Refers to the process whereby certain substances such as pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, ...
Not all contaminants are easily treated through the use of bioremediation; for example, heavy metals such as cadmium and lead are not readily absorbed or captured by organisms.
Bioaccumulation
The buildup over time, within animal tissues, of substance (e.g. heavy metals) that cannot be excreted by an organism.
This can disturb the ecosystem and causes silting that kill aquatic life. Dredging of contaminated muds can expose biota to heavy metals and other toxics. Dredging activities may be subject to regulation under Section 404 of the Clean Water Act.
Removal of mud from the bottom of water bodies for deepening through the use of special mechanical devices. Dredging disturbs the ecosystem and can kill aquatic life. Dredging of contaminated muds can expose aquatic life to heavy metals and other ...
lead (Pb) A heavy metal that is hazardous to health if breathed or swallowed. Its use in gasoline, paints, and plumbing compounds has been sharply restricted or eliminated by federal laws and regulations. See heavy metals.
toxic, mercury deposition into lakes and rivers leads to elevated levels of mercury in these organisms, which can eventually be transmitted to humans through the eating of fish and other organisms which bioaccumulate Hg and other toxic heavy metals.
In particular, if there is the potential presence of heavy metals or arsenic in ash as a result of accumulation from soil or air, or from wood treatment, it must be checked before the ash is used in this way.
Burning destroys organics, reduces the volume of waste, and vaporizes water and other liquids the wastes may contain. The residue ash produced may contain some hazardous material, such as non-combustible heavy metals, ...
that settles on surfaces is considered nothing more than a cleaning nuisance. However, some types of dust have been discovered to be health hazards. When examined, dust that humans end up breathing can also contain live bacteria, fungi, heavy metals ...
 See also: Heavy metal, Environment, Toxic, Water, Air
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