Organic compounds that evaporate readily into the atmosphere at normal temperatures. VOCs contribute significantly to photochemical smog production and certain health problems. See non-methane volatile organic compounds.
Complex molecules organized around skeletons of carbon atoms arranged in rings or chains; includes biomolecules, molecules synthesized by living organisms.
Organic Compounds: A large group of chemical compounds containing mainly carbon, hydrogen, nitrogen, and oxygen. All living organisms are made up of organic compounds.
Organic compounds formed by combustion. Usually generated in small amounts and sometimes toxic, PICs are heat-altered versions of the original material fed into the incinerator (e.g., charcoal is a P.I.C. from burning wood).
Organic compounds made up of atoms of carbon, chlorine, and fluorine. An example is Freon-12 (CCl2F2), used as a refrigerant in refrigerators and air conditioners and in making plastics such as Styrofoam.
Organic compounds that volatilise slowly at standard temperature (20 degrees C and 1 atm pressure).
Organic compounds whose carbon chain molecules contain the C=O (carbonyl) functional group at the end of a carbon chain (aldehydes), with one or more hydrogen atoms substituted by halogens (chlorine, bromine, fluorine, and/or iodine).
Organic compounds that have the ability to draw ion from their water solutions into soluble complexes.
Chemical Oxygen Demand (COD) ...
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.
organic compounds; sulfate (SO42-) is an inorganic radical.
radionuclide. Any man-made or natural element which emits
radiation in the form of alpha or beta particles, or as gamma ...
Organic compounds containing one or more halogens substituted for hydrogen. The resulting substituted compound is generally less flammable but more toxic.
Volatile Organic Compounds (VOCs): VOCs are manufactured as secondary petrochemicals. They include light alcohol's, acetone, trichloroethylene, perchloroethylene, dichloroethylene, benzene, vinyl chloride, toluene and methylene chloride.
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.
Phenols: Organic compounds that are byproducts of petroleum refining, tanning, and textile, dye, and resin manufacturing. Low concentrations cause taste and odor problems in water; higher concentrations can kill aquatic life and humans.
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)
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 (VOC) (D):
A VOC is any organic compound which participates in atmospheric photochemical reactions; a precursor to ground-level ozone formation.
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): Compounds that evaporate from the many housekeeping, maintenance, and building products made with organic chemicals. These compounds are released from products that are being used and that are in storage.
Volatile organic compounds (VOCs)
Organic chemicals all contain the element carbon (C); organic chemicals are the basic chemicals found in living things and in products derived from living things, such as coal, ...
Volatile Organic Compounds (VOCs)
Pollutants that can irritate the respiratory tract irritation and cause illness. Some VOCs (e.g. benzene) can cause cancer.
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) are carbon compounds that participate in atmospheric photochemical reactions (excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides and carbonates, and ammonium carbonate).
Volatile Organic Compounds
More information about Volatile Organic Compounds
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Semivolatile Organic Compounds: Organic compounds that volatilize slowly at standard temperature (20 degrees C and 1 atm pressure).
Hydrocarbon: Organic compounds that are built of carbon and hydrogen atoms and are often used in petroleum industries.
chlororganic Organic compounds combined with chlorine. These compounds generally originate from, or associated with, life processes such as those of algae in water.
Aerobic Treatment Process by which microbes decompose complex organic compounds in the presence of oxygen and use the liberated energy for reproduction and growth. Aerosol Suspended droplets of liquid or fine solid particles in air.
Most people use the terms "hydrocarbon" and "volatile organic compounds" (or VOCs) to mean the same thing.
 secondary production Energy in an ecosystem that is derived from the consumption of organic compounds produced by other organisms. Compare primary production.
Chlorofluorocarbons (CFCs) Organic compounds made up of atoms of carbon, chlorine, and fluorine. An example is CFC-12 (CCl2F2), used as a refrigerant in refrigerators and air conditioners and as a foam blowing agent.
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 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.
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.
The top layer removes organic compounds which could include dangerous disinfection by-products as well as those with taste and odor. The space between sand particles is larger than the smallest suspended particles, so simple filtration is not enough.
trophogenic zone a region in a body of water where synthesis of organic compounds is predominant; usually refers to the photosynthetic region ...
Phytoalexins Complex organic compounds produced by plants in response to infection and that are inhibitors of further growth by the pathogen. Phytophagous Feeding on plant material.
Fluorocarbons (FCs)- Any of a number of organic compounds analogous to hydrocarbons in which one or more hydrogen atoms are replaced by fluorine.
Amount concentration of oxygen taken up through the respiratory activity of micro-organisms growing on organic compounds present when incubated at a specified temperature (usually 20° C) for a fixed period (usually 5 days).
Iron and organic compounds (often referred to as 'coffee rock') are prominent within the horizon and the organic compounds are distributed as streaks, patches or lumps.
Hazardous organic compounds are converted to ash, carbon dioxide, and water. Burning destroys organics, reduces the volume of waste, and vaporizes water and other liquids the wastes may contain.
Capable of deriving energy for life processes only from the decomposition of organic compounds and incapable of using inorganic compounds as sole sources of energy or for organic synthesis. See also autotrophic.
honeycomb frost ...
A substance that easily combines with organic compounds.
The passage of a liquid from a weak solution to a more concentrated solution across a semipermeable membrane that allows passage of the solvent (water) but not the dissolved solids.
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.
The problem is that small engines emit disproportionately large amounts of carbon monoxide, volatile organic compounds and nitrogen oxides that contribute to smog.
VOCs — Volatile Organic Compounds, which have high enough vapor pressures to significantly vaporize and enter the atmosphere, where they become pollutants ...
NMVOC = non-methane volatile organic compounds
NMVOC emissions = chemicals other than methane that contain carbon, including alcohols, aldehydes, alkanes, aromatics, halocarbons and ketones
NO = nitric oxide ...
Organochlorines are organic compounds that contain chlorine. many are pesticides. They are are relatively persistent and accumulate in food chains, some are suspect carcinogens, and all produce dioxins when burnt.
Activated Carbon Filter: Water treatment process to remove taste, odor, some organic compounds, and radon.
Adsorption: retention of a substance by soil particles.
Aerobic: in the presence of or requiring oxygen.
autotroph: An organism that synthesizes its biochemical constituents using simple inorganic compounds and an external source of energy to drive the process. See also primary producer, photoautotroph, and chemoautotroph.
Carbon Flux: carbon movement; movement of organic compounds through an ecosystem. Specifically, the relationship between carbon dioxide absorbed by green plants and carbon dioxide respirated by various organisms.
Phloem: vascular tissue in a plant that transports sugar and other organic compounds throughout a plant
Phytoplankton: microscopic plants floating in the water column ...
The word originated from a contraction of smoke and fog, but the ugly stuff consists mostly of ground-level ozone, which is formed when oxides of nitrogen (NOx) mix with volatile organic compounds (VOCs) in the air.
At ground-level ozone is a secondary pollutant formed by the action of sunlight on primary pollutants; these are nitrogen oxides from vehicle emissions and industry and volatile organic compounds from vehicles, solvents and industry.
An Overview, Greenhouse Effect, Acid Deposition (Acid Rain), Ozone - Stratospheric and Ground-Level, Carbon Dioxide, Sulphur Oxides, Methane, Nitrogen Oxides, Volatile Organic Compounds, Chlorofluorocarbons and Halons, Energy Efficiency, ...
The forms include nitrate, nitrite, ammonia, organic nitrogen (in the form of plant material or other organic compounds), and phosphates (orthophosphate and others).
Typically consists of 50-60% methane (CH4), 30-40% carbon dioxide (CO2), 10% nitrogen (N2), small amounts of other volatile organic compounds (VOCs). Methane is a very potent greenhouse gas, 21 times more so than carbon dioxide.
This is particularly important in flooded situations, where restricted movement of gases could allow toxic organic compounds to accumulate.
NAEI National Atmospheric Emissions Inventory NECD National Emission Ceiling Directive NFR Nomenclature for Reporting NIEA Northern Ireland Environment Agency NMVOC Non-Methane Volatile Organic Compounds
Air pollutants are often grouped in categories for ease in classification. Some of these categories are solids, sulfur compounds, volatile organic compounds, particulate matter, nitrogen compounds, oxygen compounds, halogen compounds, ...
See also: Compounds, Compound, Organic, Organic compound, Environment