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| Titel |
Co-transport of Pseudomonas putida and kaolinite colloid particles through water saturated porous media |
| VerfasserIn |
I. A. Vasiliadou, C. V. Chrysikopoulos |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250026046
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| Zusammenfassung |
| Groundwater contamination is often associated with the presence of dissolved contaminants
and/or suspended particles, which are either harmful biocolloids or toxic substances sorbed
onto colloid particles. The present study focuses on the transport of bacteria in porous media
in the presence of suspended kaolinite colloid particles. The bacteria used are the species
Pseudomonas putida. Batch sorption experiments were conducted to investigate the
adsorption of Pseudomonas putida onto the surfaces of kaolinite particles. The results from
the batch experiments indicate that Pseudomonas putida significantly adsorbed onto kaolinite
colloid particles. The adsorption process is adequately described by a Langmuir type
isotherm. Transport experiments were conducted under various flow conditions in
water saturated columns packed with glass beads. Initial flowthrough experiments
were performed with bacteria and kaolinite alone in order to better understand their
individual transport characteristics. Finally, Pseudomonas putida and kaolinite
colloid particles were injected simultaneously into the packed column in order to
investigate their co-transport behavior. The flowthrough experimental data suggest that
the presence of the clay particles significantly inhibit the transport of bacteria in
water saturated porous media. The observed reduction of Pseudomonas putida
recovery at the packed column exit is mainly attributed to the attachment of bacteria
onto kaolinite particles, which are adsorbed onto the solid matrix of the column. |
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