Modeling the effect of anti-scalant on CaCO3 precipitation in continuous flow

Dmitry Lisitsin, David Hasson*, Raphael Semiat

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Scale inhibition by anti-scalants is known to involve blockage of active growth sites by adsorbed inhibitor molecules, but there is virtually no quantitative information on the kinetics of anti-scalant retarded precipitation. This paper presents a model integrating the process of anti-scalant adsorption on precipitated CaCO3 particles with the kinetics of the ensuing retarded precipitation. Adsorption is analyzed according to the Langmuir, Freundlich and Langmuir-Freundlich models, and CaCO3 precipitation is described by the commonly used surface reaction controlled model. The proposed model is validated by experimental data measured in a continuous flow precipitation system over a wide range of conditions.

Original languageEnglish
Pages (from-to)17-24
Number of pages8
JournalDesalination and Water Treatment
Volume1
Issue number1-3
DOIs
StatePublished - Jan 2009

Keywords

  • Adsorption isotherms
  • Anti-scalants
  • Kinetics
  • Scale inhibition

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