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Titolo:
Atrazine degradation by bioaugmented sediment from constructed wetlands
Autore:
Runes, HB; Jenkins, JJ; Bottomley, PJ;
Indirizzi:
Oregon State Univ, Dept Microbiol, Corvallis, OR 97331 USA Oregon State Univ Corvallis OR USA 97331 crobiol, Corvallis, OR 97331 USA Oregon State Univ, Dept Environm & Mol Toxicol, Corvallis, OR 97331 USA Oregon State Univ Corvallis OR USA 97331 Toxicol, Corvallis, OR 97331 USA Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA Oregon State Univ Corvallis OR USA 97331 oil Sci, Corvallis, OR 97331 USA
Titolo Testata:
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
fascicolo: 3, volume: 57, anno: 2001,
pagine: 427 - 432
SICI:
0175-7598(200110)57:3<427:ADBBSF>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
HERBICIDE ATRAZINE; BACTERIAL CONSORTIUM; DEGRADING BACTERIA; CONTAMINATED SOIL; PSEUDOMONAS SP; C-14 ATRAZINE; MINERALIZATION; BIOREMEDIATION; BIODEGRADATION; SURFACE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Bottomley, PJ Oregon State Univ, Dept Microbiol, Room 220,Nash Hall, Corvallis, OR 97331USA Oregon State Univ Room 220,Nash Hall Corvallis OR USA 97331
Citazione:
H.B. Runes et al., "Atrazine degradation by bioaugmented sediment from constructed wetlands", APPL MICR B, 57(3), 2001, pp. 427-432

Abstract

The potential to establish pesticide biodegradation in constructed wetlandsediment was investigated. Under microcosm conditions, bioaugmentation of sediment with small quantities of an atrazine spill-site soil (1:100 w/w) resulted in the mineralization of 25-30% of C-14 ethyl atrazine (1-10 mug g(-1) sediment) as (CO2)-C-14 under both unsaturated and water-saturated conditions; atrazine and its common metabolites were almost undetectable after 30 days incubation. By comparison, unbioaugmented sediment supplemented with organic amendments (cellulose or cattail leaves) mineralized only 2-3% ofC-14 ethyl atrazine, and extractable atrazine and its common metabolites comprised approximately 70% of the original application. The Population density of atrazine-degrading microorganisms in unbioaugmented sediment was increased from similar to 10(2)/g to 10(4)/g by bioaugmentation (1:100 w/w), and increased by another 60-fold (6.0x10(5) g(-1)) after incubation with 10 mug g(-1) of atrazine. A high population of atrazine degraders (similar to 10(6) g(-1)) and enhanced rates of atrazine mineralization also developed in bioaugmented sediment after incubation in flooded mesocosms planted with cattails (Typha lat folia) and supplemented with atrazine (3.2 mg l(-1), 1 mug g(-1) sediment). In the absence of atrazine, neither the population of atrazine degraders, nor the atrazine mineralizing potential of bioaugmentedsediment increased, regardless of the presence or absence of cattails. Bioaugmentation might be a simple method to promote pesticide degradation in nursery run-off channeled through constructed wetlands, if persistence of degraders in the absence of pesticide is not a serious constraint.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 13:40:48