African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12488

Full Length Research Paper

Sorption of lead from aqueous solutions by spent tea leaf

Yoshita, A., Lu, J.L., Ye, J.H. and Liang, Y.R.*
Zhejiang University Tea Research Institute, 268 Kaixuan Road, Hangzhou 310029, China.
Email: [email protected]

  •  Accepted: 14 April 2009
  •  Published: 18 May 2009

Abstract

 

An adsorbent was prepared using spent tea leaf and was used to remove lead (Pb) from solution. The Pb removal by the spent tea leaf adsorbent depended on pretreatment of spent tea leaf, adsorption contact time and adsorbent dosage. The optimum pretreatment conditions were confirmed to be that tea leaf was ground to0.28-0.45 mm in diameter and then drenched in 0.3 M NaOH for 12 h. Adsorption kinetic study showed that the adsorption of Pb onto the spent tea leaf followed the pseudo-second-order model. The adsorption was time dependent and adsorbent dosage dependent. The optimum contact time was 8 h.

 

Key words: Camellia sinensis, spent tea leaf, adsorbent, lead removal, adsorption kinetics.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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