Nickel Compounds
Metal compounds found in the environment and various products that are associated with several kinds of cancers in rats and mice.
Compounds: Two or more different elements held together in fixed proportions by attractive forces called chemical bonds.
Concentrate: The totality of different substances that are left behind in a filter medium after filtration.
buffer compounds/ soil
The clay, organic matter, and materials such as carbonates and phosphates that enable the soil to resist appreciable change in pH.
bulk density; soil ...
Organic Compounds: Compounds composed of carbon and hydrogen. Organic compounds form the basic building blocks of living tissue.
Organic Compounds: A large group of chemical compounds containing mainly carbon, hydrogen, nitrogen, and oxygen. All living organisms are made up of organic compounds.
- Odorous compounds
- Glossaries/Terms
Welcome to Atmospheric Emission & Environmental Odour Laboratory - Services and Information Centre ...
Compounds of hydrogen and carbon in various combinations that are present in petroleum products and natural gas. Some hydrocarbons are major air pollutants, some may be carcinogenic and others contribute to photochemical smog.
Definition source ...
compounds by organisms; includes biodegradation.
black water. Liquid and solid human body waste and the
carriage water generated through toilet usage.
Compounds
Substances containing two or more elements that are combined chemically.
Comprehensive Environmental Response, Compensation, and Liability Act ...
Compounds added to every standard, blank, matrix spike, matrix spike duplicate, sample (for volatile), and sample extract (for semivolatile) at a known concentration prior to analysis.
Organic compounds that volatilise slowly at standard temperature (20 degrees C and 1 atm pressure).
Senescence ...
Organic compounds that have a relatively neutral pH (are neither acid nor base), complex structure and, due to their carbon bases, are easily absorbed into the environment. Naphthalene, pyrene and trichlorobenzene are examples of neutrals.
Nickel ...
Chemical compounds used in anti-foulant paints to protect the hulls of boats and ships, buoys, and pilings from marine organisms such as barnacles.
Source: Terms of the Environment
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Organic compounds that contain carbon, which are often created as a result of a life process.
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phenolic compounds Organic compounds that are derivatives of benzene.
Some of the compounds in rainforest plants are also used to treat malaria, heart disease, bronchitis, hypertension, rheumatism, diabetes, muscle tension, arthritis, glaucoma, dysentery and tuberculosis, among other health problems.
Indicator Compounds: Chemical compounds, such as carbon dioxide, whose presence at certain concentrations may be used to estimate certain building conditions (e.g., airflow, presence of sources).
Semivolatile Compounds: Compounds amenable to analysis by extraction of the sample with an organic solvent. Used synonymously with Base/Neutral/Acid (BNA) compounds.
cyanogenic
Compounds able to produce cyanide.
Examples: Cyanogenic glycosides such as amygdalin in peach and apricot stones.
Specific organic compounds not subject to requirements of regulation because they are deemed by EPA to be of negligible photochemical reactivity.
Source: Terms of the Environment
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Thiols Organic compounds which contain the "-SH" functional group. Also called mercaptans.
Total dissolved solids (TDS) is the amount of dissolved matter in the water.
Organic Chemicals/Compounds- Naturally occuring (animal or plant-produced or synthetic) substances containing mainly carbon, hydrogen, nitrogen, and oxygen.
Volatile Organic Compounds (VOC) - Organic compounds that evaporate at room temperatures and are often hazardous to human health, causing poor indoor air quality. Sources of VOC's include solvents and paints.
Volatile Organic Compounds (VOCs): compounds that vaporize easily and have low water solubility that are often human-made chemicals used and produced in the manufacture of paints, pharmaceuticals, ...
Volatile organic compounds (VOCs)
substances such as solvents that are liquid at room temperature, but vaporise significantly and take part in the generation of ozone pollution in the lower atmosphere ...
Volatile organic compounds Any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, that participates in reactions of radiant energy, especially light, ...
Volatile organic compounds (VOCs)
Organic compounds that evaporate readily into the air. VOCs include substances such as benzene, toluene, methylene chloride, and methyl chloroform.
Volatile organic compounds (VOCs)
Substances containing carbon and different proportions of other elements such as hydrogen, oxygen, fluorine, chlorine, bromine, sulfur, or nitrogen; these substances easily become vapors or gases.
Volatile Organic Compounds (VOCs) - Chemicals that produce vapors readily. At room temperature and normal atmospheric pressure, vapors escape easily from volatile liquid chemicals.
organic chemicals/compounds : Animal or plant-produced substances containing mainly carbon, hydrogen, nitrogen, and oxygen.
Acid Rain Rain or any form of precipitation of dilute solutions of strong mineral acids, created by the mixing in the atmosphere of pollutants, typically sulfur dioxide and nitrogen oxides compounds, ...
A chemical complexing (forming or joining together) of metallic cations (such as copper) with certain organic compounds, such as EDTA (ethylene diamine tetracetic acid). Chelation is used to prevent the precipitation of metals (copper).
Scientists use the term organic to mean those chemical compounds which are based on carbon. Permeability The property of permitting liquids or gases to pass through. A highly permeable soil, such as sand, allows a liquid to pass through quickly.
Carbon filtering: Charcoal, a form of carbon with a high surface area, adsorbs many compounds including some toxic compounds. Water passing through activated charcoal is common in household water filters and fish tanks.
alkaline phosphatase an enzyme that hydrolizes organic phosphorus compounds, making some P available as soluble inorganic phosphate ...
Tannins Complex astringent substances containing phenolic compounds found in plants and usually making the plant material less readily digested. Especially common in bark, unripe fruits and galls on woody plants.
There is extensive evidence showing that chlorine originating from a class of synthetic compounds, the chlorofluorocarbons (CFCs), is responsible for the destruction of the ozone layer.
degradation Chemical or biological breakdown of a complex compound into simpler compounds. degrees of calcium carbonate concentrationCalcium carbonate concentration is commonly expressed as degrees.
Many are decomposers which obtain nutrients needed for survival by breaking down complex organic compounds in the tissues of living or dead organisms into simpler inorganic nutrient compounds.
Low VOC Materials - VOC’s, or Volatile Organic Compounds, are chemicals which evaporate into the air during the curing or, in some cases, throughout the life of the material.
Mercury-a naturally occurring element that is found in air, water and soil which exists in the following forms-elemental or metallic mercury, inorganic mercury compounds, and organic mercury compounds.
Mercury exists in three forms: as pure metallic mercury; in inorganic compounds such as mercuric chloride; and in organic compounds such as methylmercury, which is the most toxic.
transient tracers Chemical elements (often radioactive) or compounds that have finite lifetimes. Atmospheric testing of nuclear weapons from the mid-1950s to the early 1960s released large quantities of radionuclides to the atmosphere.
Gibberellins are a large group of related chemical compounds (over 80 have been identified) with a wide range of effects.
VOC Paints and Products: Volatile Organic Compounds (VOC) are found in many paints and other products. VOCs are emitted as gases from certain room temperature solids and liquids.
Nutrients - Nutrients are chemical elements and compounds found in the environment that plants and animals need to grow and survive. For water-quality investigations the various forms of nitrogen and phosphorus are the nutrients of interest.
Exclusive of pollen, fog, and dust, which are of natural origin, about 100 contaminants have been identified and fall into the following categories: solids, sulfur compounds, volatile organic chemicals, nitrogen compounds, oxygen compounds, ...
For example, many ozone-depleting compounds are also greenhouse gases. Some of the compounds now replacing CFCs in order to protect ozone are also greenhouse gases. And ozone itself is a greenhouse gas.
Fluorocarbons (FCs): Any of a number of organic compounds analogous to hydrocarbons in which one or more hydrogen atoms are replaced by fluorine.
Dioxins are a group of 80 or so chlorinated compounds that occur as contaminants of a number of industrial processes involving chlorinated substances.
synthetic chemicals: chemical compounds created in laboratories. There are two categories of synthetic chemicals: so-called "natural" ones made from organic material, and "artificial" ones made from inorganic compounds.
chlorofluorocarbons (CFCs) - stable, artificially-created chemical compounds containing carbon, chlorine, fluorine and sometimes hydrogen.
Able to be broken down into basic compounds by micro-organisms.
Biodegradation
Transformation of a substance into new compounds through biochemical reactions or the actions of microorganisms such as bacteria.
Carbonates Chemical compounds related to carbon dioxide.
Chelating agents Organic compounds that have the ability to draw ion from their water solutions into soluble complexes.
Carbon combines with other elements to form a variety of different compounds. Plants and animals are made up of carbon compounds, and so are certain minerals. Carbon combines with oxygen to make a gas called carbon dioxide.
A control device that oxidizes volatile organic compounds (VOCs) by using a catalyst to promote the combustion process. Catalytic incinerators require lower temperatures than conventional thermal incinerators, thus saving fuel and other costs.
PhACs: Pharmaceutically-active compounds.
PORTER-COLOGNE WATER QUALITY ACT: A California law that gives the State Water Resources Control Board ultimate authority over water rights and water control policy.
The process by which green plants use light to synthesize organic compounds from carbon dioxide and water. In the process oxygen and water are released. Increased levels of carbon dioxide can increase net photosynthesis in some plants.
To separate into simpler compounds, substances or elements.
Desalination
Refers to any of several processes that remove excess salt and other minerals from water ...
VOC: Volatile organic compounds. VOC's are toxins commonly found in conventional paints, sealers, and finishes. VOC's off-gas into the air and are not good to people or to the environment.
 See also: Organic, Water, Air, Environment, Site
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