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Titolo:
Degradation of herbicides in shallow Danish aquifers: an integrated laboratory and field study
Autore:
Albrechtsen, HJ; Mills, MS; Aamand, J; Bjerg, PL;
Indirizzi:
Tech Univ Denmark, Groundwater Res Ctr, Dept Environm Sci & Engn, DK-2800 Lyngby, Denmark Tech Univ Denmark Lyngby Denmark DK-2800 & Engn, DK-2800 Lyngby, Denmark Syngenta, Jealotts Hill Res Stn, Bracknell RG42 6ET, Berks, England Syngenta Bracknell Berks England RG42 6ET cknell RG42 6ET, Berks, England Geol Survey Denmark & Greenland, Dept Geochem, DK-2400 Copenhagen, DenmarkGeol Survey Denmark & Greenland Copenhagen Denmark DK-2400 agen, Denmark
Titolo Testata:
PEST MANAGEMENT SCIENCE
fascicolo: 4, volume: 57, anno: 2001,
pagine: 341 - 350
SICI:
1526-498X(200104)57:4<341:DOHISD>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
IN-GROUND WATER; NATURAL-GRADIENT TRANSPORT; NEAR-SURFACE AQUIFERS; ALLUVIAL-AQUIFER; UNITED-STATES; ATRAZINE; PESTICIDES; SOIL; IOWA; DEETHYLATRAZINE;
Keywords:
herbicides; groundwater; aquifer; microbial; degradation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Albrechtsen, HJ Tech Univ Denmark, Groundwater Res Ctr, Dept Environm Sci & Engn, Bldg 115, DK-2800 Lyngby, Denmark Tech Univ Denmark Bldg 115 Lyngby Denmark DK-2800 Denmark
Citazione:
H.J. Albrechtsen et al., "Degradation of herbicides in shallow Danish aquifers: an integrated laboratory and field study", PEST MAN SC, 57(4), 2001, pp. 341-350

Abstract

Degradation of pesticides in aquifers has been evaluated based on a numberof co-ordinated field and laboratory studies carried out in Danish aquifers. These studies included investigations of vertical and horizontal variability in degradation rates from the vadose zone to an aquifer, the effects of aerobic versus anaerobic conditions, and the importance of concentration on degradation kinetics for a selected range of herbicides. The studies were based on different experimental approaches ranging from simple batch experiments to column studies to field injection experiments and, where appropriate, results were compared. Some herbicides were degraded under aerobic conditions (some phenoxy acids, DNOC and glyphosate) and others under aerobicconditions (other phenoxy acids, DNOC; there was some indication of atrazine transformation). Certain pesticides were not degraded in any investigations (dichlobenil, the dichlobenil metabolite 2,6-dichlorobenzamide (BAM), bentazone, isoproturon, metarnitron and metsulfuron-methyl). The spatial variability was substantial, since hardly any of the investigated pesticides were degraded in all comparable samples. This means that it is very difficult to claim that a given pesticide is readily degradable in aquifers. However, the experimental approaches used (with incubations lasting more than a year) may not be sensitive enough to verify the low degradation rates that may be significant as a result of the long retention time of groundwaters. (C) 2001 Society of Chemical Industry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 19:35:59