Determination of Zinc Sulfide Solubility to High Temperatures

Diana Carolina Figueroa Murcia, Philip Loldrup Fosbøl, Kaj Thomsen*, Erling Halfdan Stenby

*Corresponding author for this work

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Abstract

A new experimental set-up and methodology for the measurement of ZnS solubility in aqueous solutions at 40, 60 and 80 °C (atmospheric pressure) is presented. The methodology implemented includes the preparation of the samples in a reduced oxygen atmosphere, particle size analysis of ZnS, quality control of the analytical technique and evaluation of equilibration time. ZnS solubility analyses were run for prolonged times (up to 11 days) to ensure that equilibrium conditions were met. The equilibration time was explored at three temperatures (40, 60 and 80 °C) observing small variations in the time required to reach the solid–liquid equilibrium at each temperature. Equilibrium was reached within 72 h. The concentration of zinc and of total sulfur were determined using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The experimental solubility data show an exponential dependency of the solubility with respect to temperature. An increase of 40 °C results in an increase of roughly 12 times for the solubility of ZnS.

Original languageEnglish
JournalJournal of Solution Chemistry
Volume46
Issue number9-10
Pages (from-to)1805-1817
ISSN0095-9782
DOIs
Publication statusPublished - 2017

Keywords

  • HP/HT reservoirs
  • Scaling materials
  • Solubility in aqueous solutions
  • Zinc sulfide

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