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Main Title Microbial transformation kinetics of xenobiotics in aquatic environment /
Author Rogers, J. E. ; Li, S. W. ; Felice, L. J.
Other Authors
Author Title of a Work
Li, S-m. W.
Felice, L. J.
CORP Author Battelle Pacific Northwest Labs., Richland, WA.;Environmental Research Lab., Athens, GA.
Publisher U.S. Environmental Protection Agency, Environmental Research Laboratory,
Year Published 1984
Report Number EPA/600/3-84/043; EPA-R-810436
Stock Number PB84-162866
Subjects Microbiology--Environmental aspects--United States ; Marine biology--Environmental aspects--United States
Additional Subjects Reaction kinetics ; Water pollution ; Microbiology ; Cresols ; Naphthols ; Quinolines ; Concentration(Composition) ; DBE 2-4 herbicide ; Acetic acid/(butoxyethyl-ester)-dichlorolphenoxy
Library Call Number Additional Info Location Last
NTIS  PB84-162866 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 105 pages ; 28 cm
The microbiological transformation rates of four organic compounds, the butoxy-ethylester of 2,4-dichlorophenoxyacetic acid (2,4-DBE), p-cresol, alpha-naphthol and quinoline, added to natural water samplers were examined in laboratory experiments. Graphical analysis of the data with first-order log plots indicated that transformation of these compounds occurred in two phases. The initial phase consisted of a lag period during which no decrease in compound concentration could be detected. Three of the compounds--p-cresol, alpha-naphthol and quinoline-- were only transformed following a lag phase. The transformation of 2,4-DBE occurred immediately upon addition of the compound to sample waters. The lag period was followed by a transformation phase where the detectable decrease in compound concentration could be described by a pseudo first-order rate equation and for which psuedo first-order constants could be determined. The variability in first-order constants for the different compounds ranged from a low of 13.6-fold for 2,4-DBE to a high of 185-fold for quinoline. Much of the variability could be accounted for in the range of average bacterial populations, measured during the transformation phase, that were used to calculate second-order rate constants and from the observation that second-order rate constants could be clustered into groups that were statistically different. The variability of second-order constants within these groups ranged from 1.18 to 36.14-fold, whereas the first-order constants ranged from 1.24 to 184.71-fold.
Caption title. "March 1984." "EPA-600/3-84-043." Microfiche.