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Desorption kinetics and leaching study of arsenic from arsenite/arsenate-loaded Natural Laterite

Author

Listed:
  • Abhijit Maiti
  • Jayanta Kumar Basu
  • Sirshendu De

Abstract

Desorption kinetics of arsenite- and arsenate-loaded Natural Laterite (NL) is performed under varying NaOH concentration (0.05-0.3 mol/L) and pH (4.0-11.0) of the desorption medium. The kinetic desorption data are well fitted to pseudo-second order kinetic model. The leaching of NL under aqueous medium is performed in the pH range of 2-12. Separately arsenite- and arsenate-loaded NL is leached according to Toxicity Characteristic Leaching Procedure (TCLP) protocol. However, recent studies indicate that TCLP significantly underestimate the leaching behaviour of arsenic. So, arsenic leaching from arsenic-loaded NL is conducted under synthetic leachate condition and results are compared with TCLP results.

Suggested Citation

  • Abhijit Maiti & Jayanta Kumar Basu & Sirshendu De, 2010. "Desorption kinetics and leaching study of arsenic from arsenite/arsenate-loaded Natural Laterite," International Journal of Environmental Technology and Management, Inderscience Enterprises Ltd, vol. 12(2/3/4), pages 294-307.
    • Handle: RePEc:ids:ijetma:v:12:y:2010:i:2/3/4:p:294-307
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