The pH dependence of Escherichia coli O157:H7 adsorption on kaolinite and goethite surfaces
作者： Taoxiang Zhang , Wenhao Yang , Xinyu Zhu , Haizhen Wang , Philip C. Brookes
DOI: 10.1007/S11368-014-0948-7
关键词: Hydrogen bond 、 Escherichia coli 、 Interaction energy 、 Goethite 、 DLVO theory 、 Chemistry 、 Kaolinite 、 Zeta potential 、 Adsorption 、 Inorganic chemistry
摘要: Understanding the adsorption processes of Escherichia coli O157:H7 in soil–water system is important order to protect public health from waterborne diseases. The aim this study was investigate role pH on E. kaolinite and goethite. goethite over a wide range levels (3–10) determined. Confocal microscopy, zeta potential, classic Derjaguin–Landau–Verwey–Overbeek (DLVO) theory, Fourier transform infrared spectrometry were used provide insights into mechanisms that affect adsorption. greater positively charged than negatively kaolinite. maximum occurred at 3, increasing resulted decreased microscopy images confirmed higher affinities low pH. Zeta interaction energy, analysis indicated electrostatic forces between surfaces controlled extent adsorbed onto pH, hydrogen bonding inner-sphere complexation play majors roles high levels. However, force not main for Goethite displayed larger capacity bacteria dependent, percentages
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