Adsorptive removal of cobalt from aqueous solution by utilizing lemon peel as biosorbent

Amit Bhatnagar, A. K. Minocha, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

325 Citations (Scopus)


The present study was undertaken to evaluate the feasibility of lemon peel waste for the removal of cobalt ions from aqueous solutions. Batch experiments were performed to study the adsorption of cobalt on lemon peel adsorbent. The maximum adsorption capacity of lemon peel adsorbent for cobalt removal was ca. 22 mg g-1. Three simplified kinetic models viz. pseudo-first-order, pseudo-second-order, and Weber and Morris intraparticle diffusion models were tested to describe the adsorption process. Kinetic parameters, rate constants, equilibrium sorption capacities, and related correlation coefficients for kinetic models were determined. It was found that the present system of cobalt adsorption on lemon peel adsorbent could be described more favorably by the pseudo-second-order kinetic model. The adsorption process has been found to be exothermic. The results of the present study suggest that lemon peel waste can be used beneficially in treating industrial effluents containing heavy metal ions.

Original languageEnglish
Pages (from-to)181-186
Number of pages6
JournalBiochemical Engineering Journal
Issue number2
Publication statusPublished - 15 Jan 2010
Externally publishedYes


  • Adsorption
  • Biosorption
  • Cobalt removal
  • Heavy metals
  • Lemon peel waste
  • Waste treatment

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Bioengineering
  • Biomedical Engineering


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