Kinetics of dolomite dissolution in a packed bed by acidified desalinated water

Michael Greiserman, David Hasson*, Raphael Semiat, Hilla Shemer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A post treatment process commonly applied in water desalination practice serves to introduce calcium and carbonate alkalinity to the water in order to protect the distribution system from corrosion damage. Addition of magnesium ions also is currently under consideration. Dolomite is a double salt of CaCO3 and MgCO3 and its dissolution by acidified desalinated water is of interest as this could serve to provide calcium, magnesium and carbonate alkalinity in a single re-mineralization operation. A critical literature review highlights the limitations of published data on dolomite dissolution and in particular their inadequacy for predicting dissolution in industrial equipment. The present study examines the kinetics of re-mineralization of acidified desalinated water in continuous flow over a packed bed of dolomite grains. A kinetic model based on mass transfer control is presented and shown to be in excellent agreement with experimental data. Results of this study indicate that dolomite dissolution is a viable process for re-mineralization of desalinated water.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalDesalination
Volume396
DOIs
StatePublished - 17 Oct 2016
Externally publishedYes

Keywords

  • CO dissolution
  • Desalinated water
  • Dolomite
  • HSO dissolution
  • Mass transfer
  • Post-treatment

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