Pseudo-Isotherms using a second order kinetic expression constant

Yuh Shan Ho

Research output: Contribution to journalArticlepeer-review

127 Citations (Scopus)


The kinetics of four sorption systems, Cu/tree fern, Pb/tree fern, AB9/activated clay and BR18/activated clay have been studied based on the assumption of a pseudo-second order rate law. Pseudo-isotherms using the pseudo-second order kinetic expression constant have been developed to describe the four liquid-solid sorption systems. The experimental results have been analyzed using a pseudo-Langmuir and a pseudo-Redlich-Peterson isotherm. Both isotherms were found to represent the measured sorption data well. According to the evaluation using the pseudo-Langmuir equation, the monolayer sorption capacities were obtained to be 13.9, 46.6, 124 and 105 mg g-1 for copper, lead, AB9 and BRI 8 respectively.

Original languageEnglish
Pages (from-to)151-158
Number of pages8
Issue number2
Publication statusPublished - Jun 2004


  • Adsorption
  • Equilibrium
  • Kinetics
  • Pseudo-isotherm
  • Pseudo-second order

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Process Chemistry and Technology
  • General Chemical Engineering


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