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

Subject Areas : Journal of the Iranian Chemical Research

Alafara A. Baba ¹ , Folahan A. Adekola ² , Malay K. Ghosh ³ , Tryphena Young ⁴ , Kemi I. Olawale ⁵ , Abdul R. Sheik ⁶

1 - Chemistry Department, University of Ilorin, P.M.B. 1515, Ilorin-240003, Nigeria.
2 - Chemistry Department, University of Ilorin, P.M.B. 1515, Ilorin-240003, Nigeria.
3 - Hydro & Electrometallurgy Department, Institute of Minerals and Materials Technology, Bhubaneswar- 751013, India.
4 - Chemistry Department, University of Ilorin, P.M.B. 1515, Ilorin-240003, Nigeria.
5 - Chemistry Department, University of Ilorin, P.M.B. 1515, Ilorin-240003, Nigeria.
6 - Hydro & Electrometallurgy Department, Institute of Minerals and Materials Technology, Bhubaneswar- 751013, India.

Received: 2011-07-07 Accepted : 2011-10-25 Published : 2011-03-19

Keywords: leaching, Lead, kinetic analysis, spent battery, hydrochloric acid,

Abstract :

A study of the kinetic analysis of total lead from spent Car battery ash by hydrochloric acidleaching has been examined. The physico-chemical analysis of the ash powder was carried outby 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 ashdissolution have been investigated. The dissolution rate increased with hydrochloric acidconcentration and temperature with decreasing particle size. The kinetic study indicated that thedissolution of total lead could be represented by a shrinking core model with product layerdiffusion control mechanism at lower temperatures and a surface chemical reaction controlledmechanism at higher temperatures. The activation energy, Ea and reaction order of 44.13 kJ/moland 1.14 were obtained, respectively for the dissolution process under the following establishedconditions: solid/liquid ratio = 10 g/L, HCl concentration = 4M, temperature= 80 °C, Stirringspeed = 300 rpm, Particle size = 0.050–0.063 mm for 120 minutes.

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