论文部分内容阅读
The adsorption properties of Cu2+-loaded montmorillonite clays (MMT-Cu) for Escherichia coli K88 as a function of time,bacteria concentrations,pH,ionic strength and temperature were investigated.The results showed that the bacteria adsorption onto MMT-Cu surface reached equilibrium after 90 min.The percentages of E.coli K88 adsorbed onto the surfaces of MMT-Cu and montmorillonite clays (MMT) at equilibrium were 88.9％ and 56.5％,respectively.Scanning electron microscopy revealed that a lot of E.coli K88 adhered to the surface of MMT-Cu.The zeta potential of MMT-Cu was relatively high as compared to that of MMT.The adsorptive ability of MMT-Cu for E.coli K88 was higher than that of MMT (P ＜ 0.05).Moreover,pH,ionic strength and temperature produced a strong influence on the extent of E.coli K88 adsorption to surface of MMT-Cu and MMT.The mechanism of adsorption of E.coli onto MMT-Cu may involve electrostatic attraction and physiochemical properties of bacterial cell walls and minerals surfaces.