Anaerobic degradation of diethyl phthalate, di-n-butyl phthalate, and di-(2-ethylhexyl) phthalate from river sediment in Taiwan.
Chemosphere
; 58(11): 1601-7, 2005 Mar.
Article
em En
| MEDLINE
| ID: mdl-15694480
ABSTRACT
We investigated anaerobic degradation rates for three phthalate esters (PAEs), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), and di-(2-ethylhexyl) phthalate (DEHP), from river sediment in Taiwan. The respective anaerobic degradation rate constants for DEP, DBP, and DEHP were observed as 0.045, 0.074, and 0.027 1/day, with respective half-lives of 15.4, 9.4, and 25.7 days under optimal conditions of 30 degrees C and pH7.0. Anaerobic degradation rates were enhanced by the addition of the surfactants brij 35 and triton N101 at a concentration of 1 critical micelle concentration (CMC), and by the addition of yeast extract. Degradation rates were inhibited by the addition of acetate, pyruvate, lactate, FeCl3, MnO2, NaCl, heavy metals, and nonylphenol. Our results indicate that methanogen, sulfate-reducing bacteria, and eubacteria are involved in the degradation of PAEs.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ácidos Ftálicos
/
Bactérias Anaeróbias
/
Sedimentos Geológicos
/
Dibutilftalato
/
Dietilexilftalato
Limite:
Animals
País/Região como assunto:
Asia
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article