Second-order kinetic model for the sorption of cadmium onto tree fern: A comparison of linear and non-linear methods

  • Ho Y
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Abstract

A comparison was made of the linear least-squares method and a trial-and-error non-linear method of the widely used pseudo-second-order kinetic model for the sorption of cadmium onto ground-up tree fern. Four pseudo-second-order kinetic linear equations are discussed. Kinetic parameters obtained from the four kinetic linear equations using the linear method differed but they were the same when using the non-linear method. A type 1 pseudo-second-order linear kinetic model has the highest coefficient of determination. Results show that the non-linear method may be a better way to obtain the desired parameters. © 2005 Elsevier Ltd. All rights reserved.

Author-supplied keywords

  • Biosorption
  • Kinetics
  • Metal
  • Pseudo-second-order
  • Tree fern

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