Kinetic analysis of total Lead from spent Car battery by hydrochloric acid leaching

Authors

1 Chemistry Department, University of Ilorin, P.M.B. 1515, Ilorin-240003, Nigeria.

2 Hydro & Electrometallurgy Department, Institute of Minerals and Materials Technology, Bhubaneswar- 751013, India.

Abstract

A study of the kinetic analysis of total lead from spent Car battery ash by hydrochloric acid
leaching has been examined. The physico-chemical analysis of the ash powder was carried out
by the Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) and X–ray diffraction (XRD).
The effects of the acid concentration, temperature and particle size on the rate of battery ash
dissolution have been investigated. The dissolution rate increased with hydrochloric acid
concentration and temperature with decreasing particle size. The kinetic study indicated that the
dissolution of total lead could be represented by a shrinking core model with product layer
diffusion control mechanism at lower temperatures and a surface chemical reaction controlled
mechanism at higher temperatures. The activation energy, Ea and reaction order of 44.13 kJ/mol
and 1.14 were obtained, respectively for the dissolution process under the following established
conditions: solid/liquid ratio = 10 g/L, HCl concentration = 4M, temperature= 80 °C, Stirring
speed = 300 rpm, Particle size = 0.050–0.063 mm for 120 minutes.

Keywords


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