Inderscience Publishers

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

0
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.

Keywords: arsenic desorption, synthetic leachate, TCLP, toxicity characteristic leaching procedure, laterite leaching, leachability index, desorption kinetics, adsorption

Customer comments

No comments were found for Desorption kinetics and leaching study of arsenic from arsenite/arsenate-loaded Natural Laterite. Be the first to comment!