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Comparison of Effect of Solution pH on the Adsorption of Pb, Cd, Cu to Solid Phases in Natural Water

GUO Yuan-yuan, DU Xian-yuan, LIU Liang, HUA Xiu-yi, DONG De-ming   

  1. College of Environment and Resources, Jilin University, Changchun 130012,China
  • Received:2007-11-18 Revised:1900-01-01 Online:2008-05-26 Published:2008-05-26
  • Contact: GUO Yuan-yuan

Abstract: Simulating adsorption experiments were carried out to investigate adsorption thermodynamic characteristics of heavy metals to deposited sediments (DS), suspended particulate material (SPM) and surface coatings (SC) at different solution pH. The results indicated that Langmuir equation can be used to describe the adsorption thermodynamic processes of heavy metals well to those in the three solid phases. The decreasing order of adsorption capacity of the solid phases was SPM, SC and DS at the same pH, the adsorption capacity of heavy metals to the three solid phases was Pb>Cu>Cd; The adsorption capacity of the three solid phases was increased with the solution pH value, in which the adsorption capacity of SPM was influenced greatly by pH; Comparing with Cu and Cd, the effect of pH value on Pb adsorption to three solid phases was the most remarkable.

Key words: surface coating, suspended particulate material, deposited sediment, heavy metal, adsorption, pH

CLC Number: 

  • X132
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