Lead sorption on the surface of ZnS with relevance to flotation: A fluorescence reflexafs study

R. A.D. Pattrick, J. M. Charnock, K. E.R. England, J. F.W. Mosselmans, K. Wright

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

XAS was employed to determine the nature of lead speciation on the surface of ZnS with relevance to sphalerite flotation. Lead sorbed onto the ZnS surface from mildly acidic solutions is present in a very disordered environment bonded to oxygen. On the addition of xanthate, bonds are formed between the surface lead and the xanthate sulfur, creating a more ordered structural environment for the lead. Atomistic computer simulations demonstrated that direct sorption of Pb onto the ZnS surface is energetically unfavourable. Thus, XAS has provided direct structural information for the processes involved in the activation of sphalerite during galena flotation.

Original languageEnglish
Pages (from-to)1025-1033
Number of pages9
JournalMinerals Engineering
Volume11
Issue number11
Publication statusPublished - 1 Jan 1998
Externally publishedYes

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