E. coli interactions, adhesion and transport in alumino-silica clays.
Bacterial adhesion and transport in the geological formation are controlled by their mutual complex interactions, which have been quantified by the traditional and extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory as well as direct atomic force microscopy (AFM) measurements. In this research, the DLVO forces calculated based on the independently determined bacterial and porous media surface thermodynamic properties were compared with those of AFM measurements. Although differences in the order of several magnitudes existed, forces obtained from both ways could explain the observations of E. coli attachment to alumino-silica clays evaluated in laboratory columns under saturated and steady-state flow conditions. E. coli deposition in alumino-silica clays was simulated using a two-site convection-dispersion transport model against E. coli transport breakthrough curves, which was then linked to the interactions forces. By exploring the differences of the two force measurements, it was concluded that the thermodynamic calculations could complement the direct force measurements in describing bacterial interactions with the surrounding environment and the subsequent transport in the porous media.
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, PR China.
Houzhen
H
Wei
Department of Chemical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, United States.
Guang
G
Yang
Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, United States.
Boya
B
Wang
Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, United States.
Runwei
R
Li
Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, United States. Electronic address: gchen@eng.fsu.edu.
Gang
G
Chen
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, PR China.
Zhenze
Z
Li
D000538:Aluminum Silicates / Q000737:chemistry*; D001422:Bacterial Adhesion; D001692:Biological Transport; D000077215:Clay; D004783:Environmental Microbiology; D004926:Escherichia coli / Q000502:physiology*; D018625:Microscopy, Atomic Force; D008954:Models, Biological; D016062:Porosity; D055672:Static Electricity; D013499:Surface Properties; D013816:Thermodynamics; D017641:Zeolites / Q000737:chemistry*
D000538:Aluminum Silicates; D017641:Zeolites; D000077215:Clay
AFM; Adhesion; Alumino-silica clay; DLVO; E. coli; Interaction; Modeling; Transport