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Comparison of Adsorption Thermodynamics Parameters of Lead and Cadmium onto the Biofilm, Suspended Solids and Sediment

DONG De-ming, LIU Liang, GAO Ming, HUA Xiu-yi, LI Yu   

  1. College of Environment and Resources, Jilin University, Changchun 130012,China
  • Received:2005-10-10 Revised:1900-01-01 Online:2006-09-26 Published:2006-09-26
  • Contact: DONG De-ming

Abstract: The adsorption thermodynamic characteristics of Pb and Cd onto natural biofilm, suspended solids and sediments collected from Songhua River were firstly investigated. The adsorption capacity of these three adsorbents was compared on the basis of adsorption thermodynamics parameters and the reasons of difference of adsorption capacity were also discussed. The results indicate that the classical Langmuir and Freundlich adsorption isotherm can be used to well describe the adsorption thermodyna-mics of Pb and Cd. The decreasing order of adsorption capacity of three adsorbents is in the decreasing order of biofilm, suspended solids and sediments and the adsorption capacity of Pb onto these adsorbents is significantly higher than that of Cd.

Key words: biofilm, suspended solids, sediment, adsorption

CLC Number: 

  • X132
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