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Adsorption Properties and Gaseous Mercury Transformation Rate of Natural Biofilm

Abstract

Biofilms were developed on glass microscope slides in a natural aquatic environment and their mercury adsorption properties were evaluated. Results demonstrated that the biofilms contained a large number of bacterial cells and associated extracellular polymers. Mercury forms detected in the biofilms were mainly bound to residual matter and organic acids. The adsorption processes could be described by a Langmuir isotherm. The optimum conditions for adsorption of mercury to natural biofilm were an ionic strength of 0.1 mol/L, pH 6 and an optimum adsorption time of 40 min. The transformation rate was 0.79 μg gaseous mercury per gram of biofilm.

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Correspondence to Jinping Cheng.

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Cheng, J., Zhao, W., Liu, Y. et al. Adsorption Properties and Gaseous Mercury Transformation Rate of Natural Biofilm. Bull Environ Contam Toxicol 81, 516–520 (2008). https://doi.org/10.1007/s00128-008-9526-2

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Keywords

  • Biofilm
  • Mercury
  • Gaseous mercury
  • Adsorption properties