Effect of pH on lead removal from water using tree fern as the sorbent

Yuh Shan Ho

Research output: Contribution to journalArticlepeer-review

209 Citations (Scopus)


The sorption of lead from water onto an agricultural by-product, tree fern, was examined as a function of pH. The sorption processes were carried out using an agitated and baffled system. Pseudo-second-order kinetic analyses were performed to determine the rate constant of sorption, the equilibrium sorption capacity, and the initial sorption rate. Application of the pseudo-second-order kinetics model produced very high coefficients of determination. Results showed the efficiency of tree fern as a sorbent for lead. The optimum pH for lead removal was between 4 and 7, with pH 4.9 resulting in better lead removal. Ion exchange occurred in the initial reaction period. In addition, a relation between the change in the solution hydrogen ion concentration and equilibrium capacity was developed and is presented.

Original languageEnglish
Pages (from-to)1292-1296
Number of pages5
JournalBioresource Technology
Issue number11
Publication statusPublished - Jul 2005


  • Adsorption
  • Biosorption
  • Lead
  • pH
  • Pseudo-second-order
  • Tree fern

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Food Science
  • Process Chemistry and Technology
  • Applied Microbiology and Biotechnology


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