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Перевод: contaminant

загрязняющее вещество

Тезаурус:

1. The mutant gene, they now confess, found its way into their cell cultures as a contaminant and there is no longer any evidence that cancer genes may be inherited (see Nature vol 302, p 476).
2. Trichloroethylene (an industrial solvent that is a common contaminant of drinking water) may produce tiredness, dizziness, headache, irritability and digestive problems.
3. Several designs of absorption towers are available which incorporate various types of gas/liquid counteracting equipment.l Absorption is not suitable therefore where the odorous contaminant is only slightly soluble or where the odour threshold detection concentration is particularly low.
4. The preferred method is measuring of the contaminant concentration, combined with some other measurement to ensure that the contaminant is being mineralised rather than being transformed to some other intermediate compound.
5. The AFC124 high flow personal sampler, from Casella , has a flow range of 0.5 to 2.5 l min -1 and is ideal for the collection of virtually any industrial contaminant such as dusts, fibres, fumes mists, vapours and gases.
6. The processing of contaminated groundwater in above-ground reactors has the advantage of providing plume management, because pumping water from the centre of a contaminant plume induces groundwater flow toward the well, thus preventing migration.
7. When microorganisms and additional nutrients are introduced, they are generally added at the edges of the plume, or at least up-gradient from the contaminant source.
8. The rate of biodegradation may be monitored in several ways, including observing the rate at which CO2 is evolved; the rate at which chloride is produced (if the compound contains chlorine; the changes in TOC (total organic carbon) and COD (chemical oxygen demand); and changes in the concentration of the contaminant.
9. Sometimes enzymes used for degradation of a target contaminant are not induced by the presence of the pollutant, either because the concentration is too low or because of the xenobiotic nature of the compound.
10. If it is allowed to get too hot it also produces dioxin, an unacceptable contaminant in the TCP used for manufacture of hexachlorophene.
11. (The environmental problems associated with doing nothing include migration of the contaminant plume before any subsurface microorganisms have the opportunity to act.)
12. The goal of the engineer is to find a microorganism, generally a bacterium, that will metabolise (or at least oxidise) the target contaminant under the conditions in the contaminated site or in an above-ground reactor.