Transport of bacteria in heterogeneous media under leaching conditions

Bacterial mobility under unsaturated soils play an important role in the dispersal of pathogenic microorganisms and enhancing biorestoration of contaminated soil. Experiments were conducted to evaluate the effects of bacterial retention under unsaturated flow conditions in 5% and 10% bentonite–sand mixtures. Bacterial transport and retention was investigated under different rainfall events at 22°C and 4°C. Results indicated that bacterial accumulation was predominantly at the surface of the porous media and decreased with depth. Bacterial movement was also retarded relative to the chloride tracer in all fractions of the porous media. Heterogeneity of the porous media enhanced retention through filtration, specific surface area, and reduction in permeability. Recovery of the bacteria was influenced by the air–water interface with greater bacteria recovered at 4°C compared to 22°C. The colloidal filtration model described the distribution through the experimental columns. A linear relationship was observed ...

[1]  E. Guerrieri,et al.  Survival of an Aeromonas hydrophila in an artificial mineral water microcosm. , 2002, Water research.

[2]  Thiruvenkatachari Viraraghavan,et al.  Removal of heavy metals from aqueous solutions using immobilized fungal biomass in continuous mode , 1998 .

[3]  P. Sharma,et al.  Mechanisms of microbial movement in subsurface materials , 1989, Applied and environmental microbiology.

[4]  John L. Wilson,et al.  Visualization of the role of the gas‐water interface on the fate and transport of colloids in porous media , 1994 .

[5]  P. Maloszewski,et al.  Effects of Velocity on the Transport of Two Bacteria Through Saturated Sand , 1999 .

[6]  C. Gerba,et al.  Virus movement in soil during saturated and unsaturated flow , 1984, Applied and environmental microbiology.

[7]  A. E. Greenberg,et al.  Standard Methods for the Examination of Water and Wastewater seventh edition , 2013 .

[8]  Mark L. Brusseau,et al.  Characterizing gas-water interfacial and bulk-water partitioning for gas-phase transport of organic contaminants in unsaturated porous media , 1997 .

[9]  Nancy E. Kinner,et al.  Role of physical heterogeneity in the interpretation of small‐scale laboratory and field observations of bacteria, microbial‐sized microsphere, and bromide transport through aquifer sediments , 1993 .

[10]  P. Sharma,et al.  Effect of Grain Size on Bacterial Penetration, Reproduction, and Metabolic Activity in Porous Glass Bead Chambers , 1994, Applied and environmental microbiology.

[11]  B. Logan,et al.  Effect of bacterial heterogeneity on adhesion to uniform collectors by monoclonal populations , 1994 .

[12]  G. W. Thomas,et al.  Transport of Escherichia coli through intact and disturbed soil columns , 1985 .

[13]  S. Silliman,et al.  Bacterial transport in heterogeneous porous media: Observations from laboratory experiments , 2001 .

[14]  W. Verstraete,et al.  Water-facilitated transport of bacteria in unsaturated soil columns: Influence of cell surface hydrophobicity and soil properties , 1993 .

[15]  G. Hornberger,et al.  Physical and chemical factors influencing transport of microorganisms through porous media , 1991, Applied and environmental microbiology.

[16]  J. W. Costerton,et al.  Understanding bacterial biofilms , 1991 .

[17]  M. Fletcher.  The effects of culture concentration and age, time, and temperature on bacterial attachment to polystyrene , 1977 .

[18]  T. Viraraghavan,et al.  Land application of phosphorus-laden sludge: a feasibility analysis. , 2002, Journal of environmental management.

[19]  L. M. McDowell-Boyer,et al.  Particle transport through porous media , 1986 .

[20]  C. Gerba,et al.  Virus transport and survival in saturated and unsaturated flow through soil columns , 1990 .

[21]  Douglas M. Joy,et al.  Microbial contamination of subsurface tile drainage water from held applicat10ns of liquid manure , 1998 .

[22]  R. Bales,et al.  Effect of temperature-controlled motility on transport of bacteria and microspheres through saturated sediment , 1995 .

[23]  J. Parlange,et al.  Dual‐energy synchrotron X ray measurements of rapid soil density and water content changes in swelling soils during infiltration , 1998 .

[24]  Jamal Abu-Ashour,et al.  MOVEMENT OF BACTERIA IN UNSATURATED SOIL COLUMNS WITH MACROPORES , 1998 .

[25]  A. Zehnder,et al.  Bacterial Accumulation at the Air-Water Interface , 1998 .

[26]  A. Mills,et al.  Water saturation and surfactant effects on bacterial transport in sand columns , 1998 .

[27]  L. Pang,et al.  TRANSPORT OF BACTERIA AND BACTERIOPHAGES IN IRRIGATED EFFLUENT INTO AND THROUGH AN ALLUVIAL GRAVEL AQUIFER , 1997 .

[28]  M. Alexander,et al.  Relationship between Cell Surface Properties and Transport of Bacteria through Soil , 1991, Applied and environmental microbiology.

[29]  W. Verstraete,et al.  Water-facilitated transport of bacteria in unsaturated soil columns: influence of inoculation and irrigation methods. , 1993 .

[30]  R. Bales,et al.  Transport of Pseudomonas fluorescens strain P17 through quartz sand columns as a function of water content , 1999 .

[31]  John L. Wilson,et al.  Influence of the Gas-Water Interface on Transport of Microorganisms through Unsaturated Porous Media , 1994, Applied and environmental microbiology.

[32]  Bruce E. Logan,et al.  Bacterial transport in laboratory columns and filters: Influence of ionic strength and pH on collision efficiency , 1995 .

[33]  A. Siitonen,et al.  Distribution of Aeromonas phenospecies and genospecies among strains isolated from water, foods or from human clinical samples , 1995, Epidemiology and Infection.

[34]  B. Logan,et al.  Bacterial transport in gas-sparged porous medium , 1999 .

[35]  A. G. Wollum,et al.  Transport of Microorganisms in Sand Columns , 1978 .

[36]  Jyh-Herng Chen,et al.  Methanotrophic Bacteria and Facilitated Transport of Pollutants in Aquifer Material , 1994, Applied and environmental microbiology.