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 language | English |
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Pages (from-to) | 17-24 |
Number of pages | 8 |
Journal | Desalination and Water Treatment |
Volume | 1 |
Issue number | 1-3 |
DOIs | |
State | Published - Jan 2009 |
Keywords
- Adsorption isotherms
- Anti-scalants
- Kinetics
- Scale inhibition