ATR-FTIR investigation of mechanisms of Bacillus subtilis adhesion onto variable- and constant-charge soil colloids.
作者： Li-ying Ren , Zhi-neng Hong , Zhao-dong Liu , Ren-kou Xu
DOI: 10.1016/J.COLSURFB.2017.11.067
关键词:
摘要: The primary objective of this study was to determine the capacity and mechanisms adhesion Bacillus subtilis onto variable- constant-charge soil colloids. process investigated using in situ attenuated total reflectance (ATR)-Fourier transform infrared spectroscopy (FTIR), zeta potential, batch experiments. maximum B. on colloids Oxisol, Ultisol, Alfisol reached 699.17, 462.56, 258.82mgg-1, respectively. all three decreased as suspension pH increased from 3 8. Saturation coverage rate constant values were calculated with pseudo-first-order kinetics equation absorbance at 1548cm-1. Both highest for followed by lowest Alfisol. These observations are consistent surface charges these A larger positive charge variable-charge soils (Oxisol Ultisol) relative that (Alfisol). This is agreement interaction energy between colloids, which Derjaguin-Landau-Verwey-Overbeek theory. As revealed ATR-FTIR spectroscopy, chemical bonds formed protein, phosphate, COOH groups subtilis, well iron aluminum hydroxyl soil, contributed Therefore, bond formation electrostatic two major
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