Quantitative leaching of spent galvanized zinc ash by hydrochloric acid.

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dc.contributor.authorBaba, A.A.
dc.contributor.authorOlaniyan, O.A.
dc.contributor.authorArioga, O.S.
dc.contributor.authorAremu, A.S.
dc.contributor.authorAdekunle, B.R.
dc.contributor.authorAdekola, F.A.
dc.date.accessioned2025-03-21T12:45:16Z
dc.date.available2025-03-21T12:45:16Z
dc.date.issued2016
dc.description.abstractLeaching is an extractive metallurgy technique widely used in converting metal into soluble salt in aqueous media. In this study, experiments on quantitative leaching of spent galvanized zinc ash in hydrochloric acid solution were examined. Experimental parameters such as acid concentration and reaction temperature were varied. In addition, reaction residues at optimal leaching were examined by scanning electron micrography (SEM) and the products of reaction were identified by energy dispersive X-ray (EDXRF) and X-ray diffraction (XRD). The leaching results showed that the amount of zinc ash powder dissolved increases with increasing acid concentration and temperature. At optimal conditions (4 mol/L HCl, 75°C, 0.1mm), the dissolution reached 98.5% within 120 minutes. Also, the leaching results conform to a rate limiting diffusion controlled reaction. The calculated activation energy of 25.96 kJ/mol is reasonable for a rate limiting surface reaction and supported the proposed dissolution mechanism.
dc.identifier.citationGalvanized zinc ash; leaching; hydrochloric acid; dissolution kinetic; diffusion control mechanism.
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/123456789/14897
dc.language.isoen
dc.publisherIlorin Journal of Science, Published by Faculty of Physical Sciences, University of Ilorin, Nigeria
dc.relation.ispartofseries3(1), ; 124-140
dc.titleQuantitative leaching of spent galvanized zinc ash by hydrochloric acid.
dc.typeArticle

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