OLS : Record

RECORD NUMBER: 5 OF 32

Main Title

Cell Density and Non-Equilibrium Sorption Effects on Bacterial Dispersal in Groundwater Microcosms.

Author

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;

Holdings

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

Control Number

307031574

Cataloging Source

NTIS/MT

Origin

NTIS

Type

CAT

OLS : Record

RECORD NUMBER: 5 OF 32

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