科研之友
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摘要
The biosorption of Pb2+ by the organic components (exopolymer, nonliving body bacterium and living bacterium) on the dominant bacterium obtained from the surface coatings in natural waters and the effects of biosorption time, temperature and initial pH were investigated. The results showed that Pb2+ biosorption process by the organic components above was divided into fast phase and slow phase, biosorption equilibrium time was 360, 120 and 150 min respectively; the biosorption ability of exopolymer is much higher than nonliving body bacterium and living body bacterium, the maximum biosorption amount of Pb2+ was all reached at pH = 6, the effect of temperature on the blosorption ability of nonliving body bacterium and living body bacterium was negligible; both the Longmuir and Freundlich could describe the course of the biosorption of on Pb2+ by the organic components. the biosorption ability of exopolymer is much higher than nonliving body bacterium and living body bacterium; the thermodynamics experiments also carried on when the Cd2+ was present, the biosorption of Pb2+ by the three organic components was also followed the Langmuir and Freundlich equation, but the biosorption amount and the saturated biosorption amount of Pb2+ was decreased.
- 出版日期2005-11-10
- 单位吉林大学
