Analysis of the adhesion of Pseudomonas putida NCIB 9816-4 to a silica gel as a model soil using extended DLVO theory

Geelsu Hwang, Chang-Ha Lee, Ik Sung Ahn, Byung Jin Mhin

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory was applied to explain the hydrophobic interaction-mediated adhesion of Pseudomonas putida NCIB 9816-4 to soil. Soil particles are heterogeneous, and it is difficult to define consistent physico-chemical properties such as a contact angle and zeta potential. Hence, a silica gel and a silanized (3-aminopropyltriethoxysilane-coated) silica gel, which showed greater hydrophobicity than the unmodified silica gel, were used as model soils. Gibbs energies for the cell adhesion to the silica gels were calculated with the physico-chemical properties of the microbes and the silica gels and then plotted as a function of the separation distance. The extended DLVO theory successfully explained that the adhesion of P. putida NCIB 9816-4 to the silica gel, a model soil, was primarily caused by hydrophobic interaction.

Original languageEnglish
Pages (from-to)983-988
Number of pages6
JournalJournal of Hazardous Materials
Volume179
Issue number1-3
DOIs
Publication statusPublished - 2010 Jul 1

Fingerprint

Pseudomonas putida
Silica Gel
Silica gel
adhesion
Soil
Adhesion
gel
silica
Soils
Hydrophobic and Hydrophilic Interactions
soil
Chemical properties
chemical property
Cell adhesion
hydrophobicity
Gibbs free energy
Zeta potential
Hydrophobicity
Cell Adhesion
Contact angle

All Science Journal Classification (ASJC) codes

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

Cite this

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abstract = "The extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory was applied to explain the hydrophobic interaction-mediated adhesion of Pseudomonas putida NCIB 9816-4 to soil. Soil particles are heterogeneous, and it is difficult to define consistent physico-chemical properties such as a contact angle and zeta potential. Hence, a silica gel and a silanized (3-aminopropyltriethoxysilane-coated) silica gel, which showed greater hydrophobicity than the unmodified silica gel, were used as model soils. Gibbs energies for the cell adhesion to the silica gels were calculated with the physico-chemical properties of the microbes and the silica gels and then plotted as a function of the separation distance. The extended DLVO theory successfully explained that the adhesion of P. putida NCIB 9816-4 to the silica gel, a model soil, was primarily caused by hydrophobic interaction.",
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Analysis of the adhesion of Pseudomonas putida NCIB 9816-4 to a silica gel as a model soil using extended DLVO theory. / Hwang, Geelsu; Lee, Chang-Ha; Ahn, Ik Sung; Mhin, Byung Jin.

In: Journal of Hazardous Materials, Vol. 179, No. 1-3, 01.07.2010, p. 983-988.

Research output: Contribution to journalArticle

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