Chlorinated solvent cometabolism by butane-grown mixed culture

Citation
Y. Kim et al., Chlorinated solvent cometabolism by butane-grown mixed culture, J ENV ENG, 126(10), 2000, pp. 934-942
Citations number
39
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology,"Environmental Engineering & Energy
Journal title
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
ISSN journal
0733-9372 → ACNP
Volume
126
Issue
10
Year of publication
2000
Pages
934 - 942
Database
ISI
SICI code
0733-9372(200010)126:10<934:CSCBBM>2.0.ZU;2-4
Abstract
A survey of aerobic cometabolism of chlorinated aliphatic hydrocarbons by a butane-grown mixed culture was performed. The transformation of 1,1-dichlo roethylene (1,1-DCE) and cis-1,2-dichloroethylene (c-DCE) required O-2 and was inhibited by butane and inactivated by acetylene, indicating that a mon ooxygenase enzyme was Likely involved in the transformations. The initial t ransformation rates and the quantities of chlorinated aliphatic hydrocarbon s transformed were inversely proportional to the chlorine contents within e ach group of chlorinated methanes, ethanes, and ethenes. Lower quantities o f chloroform were transformed than chloromethane and dichloromethane, but c hloroform transformation resulted in much higher cell inactivation. For the ethane group, chloroethane was most effectively transformed but caused sig nificant cell inactivation. Dior trichloroethanes that have all chlorines o n one carbon were more effectively transformed and caused less cell inactiv ation than the isomers that have chlorine on both carbons. For chlorinated ethenes, 1,1-DCE was most rapidly transformed, whereas trans- 1,2-dichloroe thylene was not transformed. Vinyl chloride was transformed to the greatest extent, and very Limited transformation of trichloroethylene was observed. The I,1-DCE transformation caused greater cell inactivation than the trans formation of the other chlorinated ethenes. Chloride release studies showed nearly complete oxidative dechlorination of chlorinated methanes and chlor oethane, vinyl chloride and c-DCE (86% similar to 100%). and incomplete dec hlorination of 1,1-dichloroethane, 1,2-dichloroethane, 1,1,1-trichloroethan e, 1,1,2-trichloroethane, and 1,1-DCE (37% similar to 75%) was observed.