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Adhesion and Transport of Bacteria in Iron-coated Media  

Lee, Chang-Gu (Environmental Biocolloid Engineering Laboratory, Seoul National University)
Park, Seong-Jik (Environmental Biocolloid Engineering Laboratory, Seoul National University)
Choi, Nag-Choul (Environmental Biocolloid Engineering Laboratory, Seoul National University)
Kim, Song-Bae (Environmental Biocolloid Engineering Laboratory, Seoul National University)
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Abstract
In this study, adhesion and transport of bacteria in positively-charged media was investigated with batch and column experiments. Bacterial species used in this study was Escherichia coli ATCC 11105(length: 2.2 ${\mu}m$, diameter: 0.6 ${\mu}m$) and media used were quartz sand(particle size distribution: 0.5-2.0 mm, mean diameter: 1.0 mm) and iron-coated sand. Batch results indicate that bacterial adhesion increased as the content of iron-coated media increased. At iron-coated media 0%(quartz sand 100%), around 46% of bacteria was adhered to media while at iron-coated media 100%(quartz sand 0%) about 97% was attached. Column results also show that bacterial adhesion was enhanced with an increase of iron-coated media content. As the iron-coated media content increased from 0 to 100%, bacterial adhesion increased from 8 to 94%. The experimental results demonstrate that positively-charged media could influence transport of bacteria in porous media.
Keywords
Iron-coated Media; Escherichia coli; Bacteria Transport; Sticking Efficiency;
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