Volatile organic chemicals VOCs

Stripping Volatile Organic Chemicals (VOC) from Water with Air... 

Compressed CO2 does not have any influence on the green-house effect, it is moreover not classified as a volatile organic chemical (VOC). Consequently, it may be regarded as a green solvent. 

The methods that generally are used to remove volatile organic chemicals (VOCs) from biological samples for analysis are applicable to chlorobenzene. These include headspace analysis, purge-and-trap (gas stripping) collection from aqueous solutions or slurry samples, solvent extraction, and direct collection on resins. Headspace analysis offers speed, simplicity, and good reproducibility for a particular type of sample. However, partitioning of the analyte between the headspace and the sample matrix is dependent upon the nature of the matrix and must be determined separately for different kinds of matrices (Walters 1986). 

Passive samplers are widely used in monitoring volatile organic chemicals (VOCs) in groundwater. Such samplers have the potential to reduce costs of monitoring from the high levels associated with the use of pumps to sample the test wells. Moreover, the risk of loss of volatile analytes during sample transport and storage is substantially reduced once the compounds are accumulated in the sampler sorption phase. 

The discovery of the effect of fluoro chloro hydrocarbons upon the ozone layer of the atmosphere has had a profound impact not only upon the aerosol industry and the producers of propellants but also upon public and scientific thinking about the whole issue of atmospheric pollution. One of the consequences of this reorientation has been the introduction, in some American states, or regulations designed to control the use of all volatile organic chemicals (VOCs) these are organic chemicals that enter the atmosphere through evaporation. By their very nature all perfume materials fall into this class. 

Environmentally friendly — httle to no volatile organic chemicals (VOCs) or hazardous air pollutants (HAPs). 

VOC is an acronym for volatile organic chemical. VOCs are significant in photochemical smog formation because they destroy radicals that form in some of the initiating reactions. If these radicals were not destroyed, the reactions that formed them would tend to reverse, and the smog formation would be reversed almost as soon as it started. 

According to Mackay (1998), volatile organic chemicals (VOCs) are the most frequently detected organic contaminants in water supply wells in the United States. Of the VOCs, by far the most common are chlorinated hydrocarbon compounds. Conversely, petroleum hydrocarbons are rarely present in supply wells. This may be due to their in situ biodegradation. 

Volatile organic chemicals (VOCs) are synthetic chemicals that readily vaporize at room temperature. These include degreasing agents, paint thin-ners, glues, dyes, and some pesticides—more specifically, benzene, carbon tetrachloride, 1.1.1-trichloroethane (TCA), trichloroethylene (TCE), and vinyl chloride. 

Ozone is not emitted by industrial sources it is formed by volatile organic chemicals (VOCs) and nitrogen oxides (known as ozone precursors) in the presence of heat and sunlight. VOCs emissions are regulated as a surrogate for ozone. 

In response to environmental concerns, efforts are on-going under both federal and state auspices to reduce levels of volatile organic chemicals (VOCs) in industrial paints. The volatile organic solvent content of paints is measured as pounds of solvent per gallon of paint. From levels of greater than 5 Ibs/gal common before 1970, current legislation is moving toward limits of VOC content to levels of 3 Ibs/gal and below. ... 

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