Fate and removal of trace pollutants from an anion exchange spent brine during the recovery process of natural organic matter and salts

Elisabeth Vaudevire*, Farzaneh Radmanesh, Annemieke Kolkman, Dennis Vughs, Emile Cornelissen, Jan Post, Walter van der Meer

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
18 Downloads (Pure)

Abstract

The results of this sampling campaign on pilot scale processes aim to evaluate the occurrence and behavior of trace organic micro-pollutants and metal elements during anion exchange treatment of surface water and the subsequent treatment of generated spent brine with two types of electrodialysis membrane pairs. This knowledge is relevant to assess the quality and reusability of secondary products created during brine treatment; specifically the excess of sodium chloride to be recycled onsite and the natural organic matter, mostly consisting of humic substances, which find multiple applications in the agricultural industry. This study highlights that (1) the attachment mechanism of organic micro-pollutants to anion exchange resin occurs through electrostatic interaction and the subsequent transfer through ion exchange membranes is restricted by size exclusion; and (2) the complexation of trace metals compounds with the natural organic matter partly explains their removal by anion exchange. Complexes remain stable during treatment of the brine with electrodialysis.

Original languageEnglish
Pages (from-to)34-44
Number of pages11
JournalWater research
Volume154
DOIs
Publication statusPublished - 1 May 2019

Keywords

  • UT-Hybrid-D
  • Electrodialysis
  • Humic substances
  • Metal traces
  • Organic micro-pollutants
  • Anion exchange

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