Difference between revisions of "VOC"
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VOCs include substances like the chlorinated hydrocarbons (CHC like: [[trichloromethane|chloroform]], tetrachloormethane, tetrachloorethyleen,...), monoaromatic substances (MAH like: [[benzene]], [[trichlorobenzene]], toluene and ethylbenzene). | VOCs include substances like the chlorinated hydrocarbons (CHC like: [[trichloromethane|chloroform]], tetrachloormethane, tetrachloorethyleen,...), monoaromatic substances (MAH like: [[benzene]], [[trichlorobenzene]], toluene and ethylbenzene). | ||
Most VOCs are industrial compounds with a high annual production. So is tetrachloormethane produced at 300.000 tons a year.<P> | Most VOCs are industrial compounds with a high annual production. So is tetrachloormethane produced at 300.000 tons a year.<P> | ||
| − | Many are persistent and toxic but show a low tendency towards [[bioaccumulation]] (at least compared to [[PCB|PCBs]]). Chronic exposure to some VOCs (e.g. benzene) can cause immunodeficiency and carcinogenic effects<ref>Roose, P.; Brinkman, U.A.Th. (2005). Determination of volatile organic compounds in marine biota, in: Roose, P. (2005). Volatile organic compounds and related microcontaminants in the Scheldt estuary and the southern North Sea: method development and monitoring. pp. 85-108 </ref>. | + | Many are [[persistent]] and [[toxic]] but show a low tendency towards [[bioaccumulation]] (at least compared to [[PCB|PCBs]]). Chronic exposure to some VOCs (e.g. benzene) can cause immunodeficiency and carcinogenic effects<ref>Roose, P.; Brinkman, U.A.Th. (2005). Determination of volatile organic compounds in marine biota, in: Roose, P. (2005). Volatile organic compounds and related microcontaminants in the Scheldt estuary and the southern North Sea: method development and monitoring. pp. 85-108 </ref>. |
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Revision as of 14:25, 5 October 2009
Definition of volatile organic compounds (VOC):
There is no clear and widely supported definition of a VOC. VOC is a term used more in relation to air quality and environmental studies. From a chemistry viewpoint “Volatile Organic Compound” can mean any organic compound (all chemical compounds containing carbon with exceptions) that is volatile (evaporating or vaporizing readily under normal conditions). This is a very broad set of chemicals. Definitions vary depending on the particular context. There are many other widely used terms that are a subclass of VOCs[1]
This is the common definition for volatile organic compounds (VOC), other definitions can be discussed in the article
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Notes
VOCs include substances like the chlorinated hydrocarbons (CHC like: chloroform, tetrachloormethane, tetrachloorethyleen,...), monoaromatic substances (MAH like: benzene, trichlorobenzene, toluene and ethylbenzene).
Most VOCs are industrial compounds with a high annual production. So is tetrachloormethane produced at 300.000 tons a year.Many are persistent and toxic but show a low tendency towards bioaccumulation (at least compared to PCBs). Chronic exposure to some VOCs (e.g. benzene) can cause immunodeficiency and carcinogenic effects[2].
Case studies
Volatile organic compounds in North Sea fish
References
- ↑ www.wikipedia.org July 27 2009
- ↑ Roose, P.; Brinkman, U.A.Th. (2005). Determination of volatile organic compounds in marine biota, in: Roose, P. (2005). Volatile organic compounds and related microcontaminants in the Scheldt estuary and the southern North Sea: method development and monitoring. pp. 85-108
