Interpretation of initial adhesion of Pseudomonas Putida on hematite and quartz using surface thermodynamics, DLVO, and XDLVO theories

Journal article


Hernandez, E., Zuki, F.M., Pourzolfagh, H. and Edyvean, R.G.J. 2022. Interpretation of initial adhesion of Pseudomonas Putida on hematite and quartz using surface thermodynamics, DLVO, and XDLVO theories. Surface Engineering and Applied Electrochemistry. 58 (3).
AuthorsHernandez, E., Zuki, F.M., Pourzolfagh, H. and Edyvean, R.G.J.
Abstract

The initial adhesion behavior of the Pseudomonas (P.) putida bacterium on hematite and quartz was interpreted by the surface thermodynamics, Derjaguin–Landau–Verwey–Overbeek, and extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theories. Physical-chemical analyses revealed that both the bacterium and the minerals are hydrophilic (γ- >28.8 mJ/m2), with hematite being the least hydrophilic (35.06 mJ/m2), followed by P. putida as moderately hydrophilic (54.42 mJ/m2), and then quartz as the most hydrophilic (54.90 mJ/m2). The zeta potential of the hematite-P. putida interaction was more electropositive than that of the quartz interaction, thus there were higher interactions between hematite and P. putida at all pH values. The thermodynamics results indicated a repulsion interaction between the bacterium and the minerals. However, the XDLVO theory effectively predicted the attachment behavior of P. putida on minerals. According to the findings, at a very short distance, interactions between the bacterium and the minerals surfaces were dominated by Lewis acid-base interactions, which constituted most of the total interaction energy. A higher positive value for the total interaction energy for quartz results in a repulsion interaction with the bacterium. Therefore, a more attractive interaction occurs between hematite and P. putida as its interaction energy is less positive. The comparison made between the theoretical results found that the XDLVO theory provides more effective and accurate outcomes for the adhesion behavior prediction between the bacterium and the minerals.

KeywordsBacterial adhesion; Pseudomonas putida; Hematite ; Quartz; Surface energy
Year2022
JournalSurface Engineering and Applied Electrochemistry
Journal citation58 (3)
PublisherElsevier
ISSN1068-3755
1934-8002
Publication process dates
Deposited07 Sep 2022
AcceptedMay 2021
Accepted author manuscript
File Access Level
Restricted
Output statusIn press
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https://repository.canterbury.ac.uk/item/9155y/interpretation-of-initial-adhesion-of-pseudomonas-putida-on-hematite-and-quartz-using-surface-thermodynamics-dlvo-and-xdlvo-theories

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