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Titolo:
Correlation of gas chromatographic properties of chlorobenzenes and polychlorinated biphenyls with the occurrence of reductive dechlorination by untamed microorganisms
Autore:
Chen, IM; Chang, FC; Wang, YS;
Indirizzi:
Natl Taiwan Univ, Dept Agr Chem, Taipei 10617, Taiwan Natl Taiwan Univ Taipei Taiwan 10617 Dept Agr Chem, Taipei 10617, Taiwan
Titolo Testata:
CHEMOSPHERE
fascicolo: 2, volume: 45, anno: 2001,
pagine: 223 - 229
SICI:
0045-6535(200110)45:2<223:COGCPO>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANAEROBIC MIXED CULTURE; CHLORINATED BENZENES; HEXACHLOROBENZENE; DEHALOGENATION; CONSORTIUM; SEDIMENTS;
Keywords:
reductive dechlorination; chlorobenzenes; polychlorinated biphenyls; chromatographic property; thermodynamic data;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, YS Natl Taiwan Univ, Dept Agr Chem, Taipei 10617, Taiwan Natl TaiwanUniv Taipei Taiwan 10617 Chem, Taipei 10617, Taiwan
Citazione:
I.M. Chen et al., "Correlation of gas chromatographic properties of chlorobenzenes and polychlorinated biphenyls with the occurrence of reductive dechlorination by untamed microorganisms", CHEMOSPHERE, 45(2), 2001, pp. 223-229

Abstract

To understand the dechlorination ability of chlorobenzenes (CBs) and polychlorinated biphenyls (PCBs) by untamed microorganisms under anaerobic condition and to correlate gas chromatographic properties with the occurrence ofreductive dechlorination, introduction of CBs and PCBs in the culture medium inoculated with microorganisms from sludge and sediment, respectively, were performed. Three kinds of culture media preparing from sludge, river water and a synthetic medium were used in the experiments. HCB was degraded to 1,3,5-trichlorobenzene (1,3,5-TCB) and 1,3-dichlorobenzene (1,3-DCB) in both sludge medium and synthetic medium with inoculated microorganisms. Three PCB congeners including 2,3,4-, 3,4,5- and 2,3,4,5-CBp (chlorinated biphenyl) were not found to be dechlorinated in the river water medium with inoculation culture but to be dechlorinated in the synthetic medium. MNDO methodology was used to compute theoretical dechlorination reaction heats and GC-ECD techniques were used to estimate chromatographic data of CB and PCB congeners. Both CB and PCB congeners showed that dechlorination by untamed microorganisms under anaerobic mixed cultures were more likely to occur when larger amounts of energy were released and greater Delta ln RRT value between the parent congener and the daughter product was observed. Delta ln RRT provided a more precise information on the singularity of PCBs ortho-dechlorination in an aspect of thermodynamic favorable rule. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 19/09/20 alle ore 21:46:57