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Environmental Engineering Research 2011;16(4): 219-225. DOI: https://doi.org/10.4491/eer.2011.16.4.219
Influence of Surfactants on Bacterial Adhesion to Metal Oxide-Coated Surfaces
Nag-Choul Choi1, Seong-Jik Park2, Chang-Gu Lee3, Jeong-Ann Park3, and Song-Bae Kim3
1Institute of Engineering Technology Research, Chonnam National University, Gwangju 500-757, Korea
2Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
3Department of Rural Systems Engineering/Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921,
Corresponding Author: Song-Bae Kim ,Tel: +82-2-880-4587, Fax: +82-2-873-2087, Email: songbkim@snu.ac.kr
Received: May 11, 2011;  Accepted: November 16, 2011.
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ABSTRACT
The objective of this study was to investigate the bacterial adhesion to iron (hydr)oxide-coated sand (IHCS) and aluminum oxidecoated sand (AOCS) in the presence of Tween 20 (nonionic surfactant) and lipopeptide biosurfactant (anionic surfactant) through column experiments. Results show that in the presence of Tween 20, bacterial adhesion to the coated sands was slightly decreased compared to the condition of deionized water; the mass recovery (Mr) increased from 0.491 to 0.550 in IHCS and from 0.279 to 0.380 in AOCS. The bacterial adhesion to the coated sands was greatly reduced in lipopeptide biosurfactant; Mr increased to 0.980 in IHCS and to 0.797 in AOCS. Results indicate that the impact of lipopeptide biosurfactant on bacterial adhesion to metal oxide-coated sands was significantly greater than that of Tween 20. Our results differed from those of the previous report, showing that Tween 20 was the most effective while the biosurfactant was the least effective in the reduction of bacterial adhesion to porous media. This discrepancy could be ascribed to the different surface charges of porous media used in the experiments. This study indicates that lipopeptide biosurfactant can play an important role in enhancing the bacterial transport in geochemically heterogeneous porous media.
Keywords: Bacterial adhesion | Column experiment | Lipopeptide biosurfactant | Metal-oxide coated sands | Surfactants | Tween 20
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