Modeling weak acids' reactive transport in reverse osmosis processes: A general framework and case studies for SWRO

Oded Nir*, Ori Lahav

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Despite appearing at relatively low concentrations, weak acids of various types have a significant impact on the design, operation and the quality of the product water in many RO (reverse osmosis) applications. During the RO process, weak acid species are simultaneously involved in interconnected transport and chemical reactions. This complex behavior requires the use of a "reactive transport" modeling approach. In this paper we present a systematic method for combining commonly used cross-membrane transport and concentration polarization models with thermodynamic aqueous phase equilibrium models. The new approach can be used for the prediction of the acid-base thermo-chemical condition that develop within the membrane module affecting the final permeate and brine characteristics in a variety of RO applications. A computerized algorithm was developed, described and applied for simulating two case studies. The case study results demonstrate the practical significance of the approach in the context of boron removal and chemical scaling control within seawater RO applications.

Original languageEnglish
Pages (from-to)147-153
Number of pages7
JournalDesalination
Volume343
DOIs
StatePublished - 16 Jun 2014
Externally publishedYes

Keywords

  • Boron
  • Modeling
  • Reactive-transport
  • SWRO
  • Weak acid

Fingerprint Dive into the research topics of 'Modeling weak acids' reactive transport in reverse osmosis processes: A general framework and case studies for SWRO'. Together they form a unique fingerprint.

Cite this