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Migrace a biodegradace chlorovaných etylénů v horninovém prostředí


Migrace a biodegradace chlorovaných etylénů v horninovém prostředí

Migration and biodegradation of chlorinated ethenes in the subsurface


• tento článok sa nachádza v kategórii: PODZEMNÁ VODA / rok 2001 [ ročník VII, číslo 1 ]
Tomáš Kuchovský

ABSTRACT: Chlorinated ethenes are one of the most observed groups of ground water contaminants. Their occurrence in saturated and unsaturated zone is mainly affected by geological conditions, their physicochemical properties and ability to be biodegradated. Contamination of ground water by chlorinated ethenes was observed at 6 localities in the eastern part of the Czech Republic (dry cleaning facilities, storages and landfill). Marked zones of higher contaminants concentrations were found in the lower or upper parts of saturated zone (homogenous porous media), These zones reflect the source of contamination, where the presence of DNAPL is likely. The persistence of the zones with higher contaminants concentrations is time-limited and space-limited, often significantly depending on ground water regime changes. The biodegradation occurred at all localities, byproducts typical for the presence of anaerobic conditions were found. The complete description of biodegradation was limited due to lack of data on daughter products concentrations. The adequate quantity of primary substrate was found to be the main limiting factor in biodegradation processes.


bibliografický
odkaz na článok:
Kuchovský, T., 2001: Migrace a biodegradace chlorovaných etylénů v horninovém prostředí.- Podzemná voda ISSN 1335-1052, VII, 1/2001, 45-55.

jazyk článku: čeština

kľúčové slová: chlorované etylény, vertikální zonalita koncentrací, kapalná fáze chlorovaných etylénů, biodegradace, primární substrát, ropné látky, chemická spotřeba kyslíku

key words: chlorinated ethenes, vertical zones of high chlorinated ethene s concentrations, DNAPL, biodegradation, prim ary substrate, petroleum hydrocarbons, chemical oxygen demand

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