OLS : Record


Main Title Cell Density and Non-Equilibrium Sorption Effects on Bacterial Dispersal in Groundwater Microcosms.
Author Lindqvist, R.; Enfield, C. G.;
CORP Author Rice Univ., Houston, TX. Dept. of Environmental Science and Engineering. ;Lund Univ. (Sweden).;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1992
Year Published 1992
Report Number EPA-R-812808; EPA/600/J-92/451;
Stock Number PB93-141505
Subjects Aquatic microbiology; Ground water; Aquatic ecosystems; Bacteria; Soils; Sands; Bacillus; Pseudomonas; Enterobacter; Microbial colony count; Reprints;
Library   Call Number Additional Info Location Date Modified
NTIS PB93-141505 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/12/1993
Collation 20p
Abstract The relative importance of dispersion, physical straining, nonequilibrium sorption, and cell density on the dispersal of bacteria was examined in saturated, flow-dynamic sand columns. The bacterial breakthrough as a result of different size distributions of sand particles was followed by measuring the effluent concentration of (3)H-adenosine-labelled cells of a Bacillus sp. and an Enterobacter sp. strain suspended in ground-water. The breakthrough curves were compared with theoretical curves predicted from an advective-dispersive equilibrium sorption model (ADS), an ADS model with a first order sink term for irreversible cell reactions, a two-site model (equilibrium and nonequilibrium sorption sites), and a filtration model. Bacterial sand:water isotherms were linear in the experimental concentration range but had positive intercepts. The partition coefficients ranged from 15 to 0.4 for the Bacillus sp., and 120 to 0.4 for a Pseudomonas sp., and decreased with increasing particle size of the dominant fraction. In a kinetic study, the partition coefficient for the Enterobacter sp. in the smaller particle sand was 63 after one hour, but had decreased to 9 after 19 hours. (Copyright (c) Springer-Verlag New York Inc. 1992.)
Supplementary Notes Pub. in Microbial Ecology, v24 p25-42 Nov 92. Prepared in cooperation with Lund Univ. (Sweden). Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK.
NTIS Title Notes Journal article.
Title Annotations Reprint: Cell Density and Non-Equilibrium Sorption Effects on Bacterial Dispersal in Groundwater Microcosms.
Category Codes 57K; 68D
NTIS Prices PC A03/MF A01
Primary Description 600/15
Document Type NT
Control Number 307031574
Cataloging Source NTIS/MT
Origin NTIS
Type CAT