Metallic elements, including those required for plant and animal nutrition, in trace concentration but which become toxic at higher concentrations. Examples are mercury, chromium, cadmium, and lead. [..]

Métaux lourds

Metallic elements with atomic numbers equal to or higher than uranium, used as a collective term to provide interdependence of the exact chemical form.

A high content of metallic minerals that contaminates soil, water or air and can affect normal growth in plants and animals.

elements between lead and copper in terms of the Periodic Table. Too much lead, zinc, nickel, mercury, arsenic, copper, or cadmium in soil can damage plants.

Metals that have a density of 5.0 or higher and a high elemental weight. Most are toxic to humans, even in low concentrations.

Mercury, lead, cadmium and nickel-highly toxic in very small quantities; can be fatal and bioaccumulate in environment-have cumulative effects in humans.

a general term given to the ions of metallic elements such as copper, zinc, chromium, and aluminum. They are removed from wastewater by forming an insoluble precipitate (usually a metallic hydroxide).

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..

A group of elements that is present in the environment from natural and anthropogenic sources and can produce toxic effects. This group includes mercury, copper, cadmium, zinc, and arsenic.

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.

Refers to a group of toxic metals including arsenic, chromium, copper, lead, mercury, silver, and zinc. Heavy metals often are present at industrial sites where operations have included battery recycl [..]

Metals with high density, such as cadmium, lead, copper, mercury and chrome. In everyday language, heavy metals are the metals which are toxic and have a very negative effect on the environment. See each of the heavy metals for more information.

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.

Metallic elements with high atomic weights (e.g., mercury, chromium, cadmium, arsenic and lead) that can be toxic to living things at low concentrations and tend to accumulate in the food chain.

Elements with high molecular weights which are generally toxic in low concentrations to plant and animal life. Examples include mercury, chromium, cadmium, arsenic, and lead.

Metals with high Specific Gravity, typically larger than 5. They have complex spectra, form colored Salts and double Salts, have a low Electrode potential, are mainly amphoteric, yield weak bases and [..]

Are elements such as copper, lead, zinc and mercury. They are found everywhere in the environment because they are naturally part of the Earth's crust. Heavy metals can become concentrated in urban environments (and end up in stormwater) because our society is based on many industrial activities which use them. They can also be found in elevat [..]

A commonly hazardous waste that can damage organisms at low concentrations, including cadmium, mercury, and lead, and which can be found in the waste stream in batteries, televisions, paints, and ink.

Metallic elements with high atomic weights, eg mercury, chromium, cadmium, arsenic and lead. They can cause damage to living organisms at very low concentrations and tend to accumulate in the food cha [..]

Any metallic chemical element that has a relatively high density and is toxic or poisonous at low concentrations.

Mercury, lead, cadmium and nickel-highly toxic in very small quantities; can be fatal and bioaccumulate in environment-have cumulative effects in humans.

metallic elements with high atomic weights, e.g. mercury, chromium, cadmium and lead. Heavy metals have the potential to remain in soils almost indefinitely, can damage living things at low concentrations and in some instances can accumulate in the food chain.

Metallic elements with high atomic weights, including mercury, lead, cadmium, arsenic, and chromium. Released as industrial pollutants, some heavy metals are toxic and may accumulate to hazardous leve [..]

Heavy metals, such as lead, copper, iron, and zinc, are naturally found in trace amounts in the earth's crust. However, heavy metals are used extensively in manufacturing and industry (see pesticides), and prolonged exposure can cause deadly health effects. DDT, dioxins and polychlorinated biphenyls (PCBs) are examples of dangerous heavy metal [..]

metallic elements (Example: cadmium, chromium, copper, lead, mercury, nickel, and zinc) which are used to manufacture products; they are present in some industrial, municipal, and urban runoff.

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. These may be found in the waste stream as part of discarded items such as batteries, lighting fixtures, colorants and inks.

Potentially toxic metals used in industrial processes, for example, arsenic, chromium, copper, lead, mercury, nickel and zinc. They may damage plant and animal life at low concentrations and tend to a [..]

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).

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.