Electrostatic interaction energy (ΔEEDL) is a part of the Extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory, which, together with van der Waals (ΔEVDW) and acid base (ΔEAB) interaction energies, has been extensively used to investigate the initial adhesion of bacteria to surfaces. Electrostatic or electrical double layer interaction energy is considerably affected by surface potential; however it cannot be determined experimentally and is usually replaced by zeta (ζ) potential via electrophoretic mobility. This paper focusses on the effect of ionic concentration as a function of pH and the effect of mineral grain size on ζ potential. It was found that both ionic strength and mineral grain size play a major role in determining the value of ζ potential for the adhesion of P. putida to hematite and quartz surfaces. Higher ζ potential values lead to higher electrostatic interaction energies and eventually to higher total XDLVO interaction energy resulting in bacterial repulsion., {"references":["Flemming. HC, Biofilms and Environmental Protection. Water Sci\nTechnol, 1993. 27(7-8): p. 1-10.","Hermansson, M., The DLVO theory in microbial adhesion. Colloids and\nSurfaces B: Biointerfaces, 1999. 14(1–4): p. 105-119.","Carpentier, B. and O. Cerf, Biofilms and their consequences, with\nparticular reference to hygiene in the food industry. Journal of Applied\nBacteriology, 1993. 75(6): p. 499-511.","Karunakaran E, et al., \"Biofilmology\": a multidisciplinary review of the\nstudy of microbial biofilms. Appl Microbiol Biotechnol, 2011. 90(6): p.\n1869-81 LID - 10.1007/s00253-011-3293-4","Donlan, R.M. and J.W. Costerton, Biofilms: survival mechanisms of\nclinically relevant microorganisms. Clin Microbiol Rev, 2002. 15(2): p.\n167-93.","Costerton J. W, Montanaro L, and Arciola C. R, Biofilm in implant\ninfections: its production and regulation. Int J Artif Organs, 2005.\n28(11): p. 1062-8.","Kumar, C.G. and S.K. Anand, Significance of microbial biofilms in food\nindustry: a review. Int J Food Microbiol, 1998. 42(1-2): p. 9-27.","Gristina, A.G., Biomaterial-centered infection: microbial adhesion\nversus tissue integration. Science, 1987. 237(4822): p. 1588-95.","Lewis, K., Riddle of biofilm resistance. Antimicrob Agents Chemother,\n2001. 45(4): p. 999-1007.\n[10] Katsikogianni, M. and Y.F. Missirlis, Concise review of mechanisms of\nbacterial adhesion to biomaterials and of techniques used in estimating\nbacteria-mineral interactions. Eur Cell Mater, 2004. 8: p. 37-57.\n[11] Busscher, H.J. and A.H. Weerkamp, Specific and non-specific\ninteractions in bacterial adhesion to solid substrata. FEMS\nMicrobiology Letters, 1987. 46(2): p. 165-173.\n[12] Fletcher, M., The physiological activity of bacteria attached to solid\nsurfaces. Adv Microb Physiol, 1991. 32: p. 53-85.\n[13] Costanzo, P.M., et al., Comparison between Direct Contact Angle\nMeasurements and Thin Layer Wicking on Synthetic Monosized Cuboid\nHematite Particles. Langmuir, 1995. 11(5): p. 1827-1830.\n[14] Boks N.P, et al., Forces involved in bacterial adhesion to hydrophilic\nand hydrophobic surfaces. Microbiology, 2008. 154(Pt 10): p. 3122-33\nLID - 10.1099/mic.0.2008/018622-0 [doi].\n[15] van Loosdrecht M. C, et al., The role of bacterial cell wall\nhydrophobicity in adhesion. Appl Environ Microbiol, 1987. 53(8): p.\n1893-7.\n[16] Jacobs A, et al., Kinetic adhesion of bacterial cells to sand: cell surface\nproperties and adhesion. Colloids Surf B Biointerfaces, 2007. 59(1): p.\n35-45.\n[17] Derjaguin, B.V. and L. Landau, Theory of the Stability of Strongly\nCharged Lyophobic Sols and of the Adhesion of Strongly Charged\nParticles in Solutions of Electrolytes. Acta Phys. Chim. URSS, 1941. 14:\np. 633-662.\n[18] Verwey E.J.W and Overbeek J.T.G, \"Theory of the stability of lyophobic\ncolloids. The interaction of particles having an electric double layer.\"\nwith the collaboration of K. van Ness. Elsevier, New York-Amsterdam,\n1948, 216 pp. Journal of Polymer Science, 1949. 4(3): p. 413-414.\n[19] Bhattacharjee, S., M. Elimelech, and M. Borkovec, DLVO interaction\nbetween colloidal particles: beyond Derjaguin's approximation.\nCroatica Chemica Acta, 1998. 71: p. 883-903. [20] Sharma, P.K. and K. Hanumantha Rao, Adhesion of Paenibacillus\npolymyxa on chalcopyrite and pyrite: surface thermodynamics and\nextended DLVO theory. Colloids and Surfaces B: Biointerfaces, 2003.\n29(1): p. 21-38.\n[21] Kosmulski M, et al., Synthesis and characterization of goethite and\ngoethite-hematite composite. Adv Colloid Interface Sci, 2003. 103(1): p.\n57-76.\n[22] Shashikala, A.R. and A.M. Raichur, Role of interfacial phenomena in\ndetermining adsorption of Bacillus polymyxa onto hematite and quartz.\nColloids and Surfaces B: Biointerfaces, 2002. 24(1): p. 11-20.\n[23] Bunt, C.R., D.S. Jones, and I.G. Tucker, The effects of pH, ionic strength\nand polyvalent ions on the cell surface hydrophobicity of Escherichia\ncoli evaluated by the BATH and HIC methods. International Journal of\nPharmaceutics, 1995. 113(2): p. 257-261.\n[24] Chen, W., 'What is Zeta Potential' Dow Chemical. American Filtration\nand Separation Society (AFS)"]} more...