Determination of bacterial and viral transport parameters in a gravel aquifer assuming linear kinetic sorption and desorption

Mallen, G.; Małoszewski, Piotr; Flynn, Raymond; Rossi, Pierre; Engel, Marion; Seiler, K-P.

doi:10.1016/j.jhydrol.2004.08.033

Cited by 14 publications

(19 citation statements)

References 28 publications

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“…The model describes the interaction of mass between the aqueous phase and the solid phase by a first‐order kinetic reaction together with instantaneous equilibrium sorption. The model has been successfully used (Chen et al ., ; Mallén et al ., ) and assumes that interaction can be divided into two fractions

S = S_{e} + S_{k}

where S e is the mass adsorbed at equilibrium sites (type‐1 sites) and assumed to be instantaneous and reversible, i.e. sites at which attachment and detachment are relative fast compared with the flow velocity (Schijven and Hassanizadeh, ) and allows equilibrium to occur, S k is the mass adsorbed at kinetically controlled sites (type‐2 sites), which is assumed to be a time‐dependent irreversible process or kinetically limited relative to flow velocity and involves constant attachment and detachment rates (Schijven and Hassanizadeh, ).…”

Section: Methodsmentioning

confidence: 97%

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Escherichia coli strains harvested from springs in Kampala, Uganda: cell characterization and transport in saturated porous media

Lutterodt

Foppen

Uhlenbrook

2013

Hydrological Processes

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We hypothesized that the transport of Escherichia coli strains harvested from springs could be characterized by a similar set of cell characteristics and transport parameters. The hypothesis was tested by sampling springs throughout the Lubigi catchment in Kampala, Uganda. Chemo‐physical parameters in addition to total coliform concentrations were determined. Furthermore, E. coli strains were harvested, and cell properties determined. Column experiments in saturated quartz columns of 7 cm height were conducted to determine transport parameters of selected E. coli strains. Using a two‐site non‐equilibrium sorption model, transport was modelled by fitting breakthrough data in HYDRUS 1D. Results indicated faecal contamination of the springs with high concentrations of total coliforms, chloride and nitrate. Furthermore, the maximum relative E. coli concentrations (C/C0)max in the column experiments were high. Compared with our previous work on E. coli strains, collected from a pasture and from zoo animals, attachment was low. Modelling revealed that both equilibrium and kinetic sorption were not important under conditions employed in the experiments. These observations are explained by the way in which the strains were harvested: from termination points of flow lines (springs). Such strains may possess characteristics that might have influenced their transport in the subsurface leading to their low attachment efficiency and possibly contributing to the lack of influence of equilibrium and kinetic sorption characteristics. There was no significant correlation between cell properties and transport parameters. Furthermore, 58% of the tested strains were of the O21:H7 serotype, and all definable serotypes identified were associated with diseases. We speculate that this serotype may possess characteristics that allow preferential transport through the aquifers of the area. We demonstrated that bacteria harvested from termination points of flow lines compared with those obtained from pollution sources, which have not undergone transport yet, present a good option for the assessment of bacteria transport characteristics in aquifers. Copyright © 2013 John Wiley & Sons, Ltd.

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S = S_{e} + S_{k}

Section: Methodsmentioning

confidence: 97%

“…The model describes the interaction of mass between the aqueous phase and the solid phase by a first-order kinetic reaction together with instantaneous equilibrium sorption. The model has been successfully used (Chen et al, 2003;Mallén et al, 2005) and assumes that interaction can be divided into two fractions…”

Section: Transport Modelmentioning

confidence: 99%

Escherichia coli strains harvested from springs in Kampala, Uganda: cell characterization and transport in saturated porous media

Lutterodt

Foppen

Uhlenbrook

2013

Hydrological Processes

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“…In contrast to the velocities in the first section, the apparent MS2 velocity in the second section was considerably faster than that of chloride (Tables and ). This indicated that the phages were less dispersed than chloride, in line with pore size exclusion theory [e.g., Mallén et al ., ; Wall et al ., ] and/or truncation of the MS2 BTC. Truncation is the process where an initially high attachment rate in the early hours of transport prevents further rise in the MS2 curve at the longer distance and thus an apparently early peak arrival [ DeBorde et al ., ].…”

Section: Resultsmentioning

confidence: 99%

Rapid bacteriophage MS2 transport in an oxic sandy aquifer in cold climate: Field experiments and modeling

Kvitsand

Ilyas

Østerhus

2015

Water Resources Research

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Virus removal during rapid transport in an unconfined, low-temperature (68C) sand and gravel aquifer was investigated at a riverbank field site, 25 km south of Trondheim in central Norway. The data from bacteriophage MS2 inactivation and transport experiments were applied in a two-site kinetic transport model using HYDRUS-1D, to evaluate the mechanisms of virus removal and whether these mechanisms were sufficient to protect the groundwater supplies. The results demonstrated that inactivation was negligible to the overall removal and that irreversible MS2 attachment to aquifer grains, coated with iron precipitates, played a dominant role in the removal of MS2; 4.1 log units of MS2 were removed by attachment during 38 m travel distance and less than 2 days residence time. Although the total removal was high, pathways capable of allowing virus migration at rapid velocities were present in the aquifer. The risk of rapid transport of viable viruses should be recognized, particularly for water supplies without permanent disinfection.

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“…Finally, the liquid supernatant in the flask was removed, observed with the fluorescence microscope and counted. Based on methods summarized in other studies, four adsorption equilibrium curves were drawn (Mallén et al, 2005;Zhang et al, 2011;Bilardi et al, 2013):…”

Section: Adsorption Equilibrium Of P Nicotianae Zoospores and Relatementioning

confidence: 99%

“…Researchers have done a lot of work on the effects of adsorption and desorption on microorganisms in soil. For example, theoretical models have been proposed, including the Linear, Freundlich, Langmuir and Temkin adsorption equilibrium models (Mallén et al, 2005;Zhang et al, 2011;Bilardi et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Study on the Migration of Phytophthora nicotianae Zoospores in the Soil

Jun¹

2018

IJAB

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Phytophthora nicotianae causing devastating tobacco black shank in all over the world is a soil-borne biflagellated oomycete plant pathogen. P. nicotianae zoospores are the secondary infection of source in tobacco plants, which can spread rapidly in fields by water currents and on their own swimming in aquatic environments. In order to understand the P. nicotianae zoospore's migration and retention mechanism and provide theoretical basis for effectively preventing its migration in soil, this study deeply investigated the adsorption equilibrium parameters, adsorption kinetics and soil-column infiltration characteristics of P. nicotianae zoospores in soil. It did so by using P. nicotianae marked with green fluorescent protein (GFP) and establishing a corresponding mathematical model to provide a theoretical basis for the effective prevention and control of tobacco black shank. The results showed that with a determination coefficient of 99.61% and an adsorption equilibrium parameter K of 7.206×10 6 mL/g, the adsorption equilibrium characteristics of P. nicotianae zoospores agreed with the Temkin equation in the soil of a tobacco-rice rotation. The adsorption of zoospores achieved a state of equilibrium in 40 min and then became relatively stable after 40-140 min, and the reversible adsorption constant and reversible desorption constant were 5.634×10-1 s-1 and 3.172×10-8 s-1 , respectively. The soil significantly hindered the migration of P. nicotianae zoospores, which makes that zoospores mainly stayed in the soil column that ranged from 0-5 cm. Moreover, the redistribution of the zoospores in the unsaturated soil increased the downward migration of the zoospores. In addition, the redistribution process of zoospores in unsaturated soil does increase their downward migration.

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Determination of bacterial and viral transport parameters in a gravel aquifer assuming linear kinetic sorption and desorption

Cited by 14 publications

References 28 publications

Escherichia coli strains harvested from springs in Kampala, Uganda: cell characterization and transport in saturated porous media

Escherichia coli strains harvested from springs in Kampala, Uganda: cell characterization and transport in saturated porous media

Rapid bacteriophage MS2 transport in an oxic sandy aquifer in cold climate: Field experiments and modeling

Study on the Migration of Phytophthora nicotianae Zoospores in the Soil

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