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Titolo:
Modeling microbial processes in porous media
Autore:
Murphy, EM; Ginn, TR;
Indirizzi:
Pacific NW Labs, Interfacial Geochem Grp, Richland, WA 99352 USA Pacific NW Labs Richland WA USA 99352 Geochem Grp, Richland, WA 99352 USA Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 & Environm Engn, Davis, CA 95616 USA
Titolo Testata:
HYDROGEOLOGY JOURNAL
fascicolo: 1, volume: 8, anno: 2000,
pagine: 142 - 158
SICI:
1431-2174(200002)8:1<142:MMPIPM>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOLOGICALLY REACTING SOLUTES; OXIDIZING MIXED CULTURE; SANDY AQUIFER; BACTERIAL TRANSPORT; IN-SITU; COMPETITIVE-INHIBITION; PHYSICAL HETEROGENEITY; CONTAMINANT TRANSPORT; MATHEMATICAL-MODELS; ESCHERICHIA-COLI;
Keywords:
contamination; bacterial transport; numerical modeling; microbial processes;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
138
Recensione:
Indirizzi per estratti:
Indirizzo: Murphy, EM Pacific NW Labs, Interfacial Geochem Grp, MSIN K3-61,POB 999, Richland, WA99352 USA Pacific NW Labs MSIN K3-61,POB 999 Richland WA USA 99352 52 USA
Citazione:
E.M. Murphy e T.R. Ginn, "Modeling microbial processes in porous media", HYDROGEOL J, 8(1), 2000, pp. 142-158

Abstract

The incorporation of microbial processes into reactive transport models has generally proceeded along two separate lines of investigation: (1) transport of bacteria as inert colloids in porous media, and (2) the biodegradation of dissolved contaminants by a stationary phase of bacteria. Research over the last decade has indicated that these processes are closely linked. This linkage may occur when a change in metabolic activity alters the attachment/detachment rates of bacteria to surfaces, either promoting or retarding bacterial transport in a groundwater-contaminant plume. Changes in metabolic activity, in turn, are controlled by the time of exposure of the microbes to electron acceptors/donor and other components affecting activity. Similarly, metabolic activity can affect the reversibility of attachment, depending on the residence time of active microbes. Thus, improvements in quantitative analysis of active subsurface biota necessitate direct linkages between substrate availability, metabolic activity, growth, and attachment/detachment rates. This linkage requires both a detailed understanding of the biological processes and robust quantitative representations of these processes that can be rested experimentally. This paper presents an overview of current approaches used to represent physicochemical and biological processes in porous media, along with new conceptual approaches that link metabolicactivity with partitioning of the microorganism between the aqueous and solid phases.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 23:16:53