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

Journal Article (2019)
Author(s)

Elisabeth Vaudevire (TU Delft - Applied Sciences, PWNT Water Technology, Wetsus, European Centre of Excellence for Sustainable Water Technology, TU Delft - OLD BT/Cell Systems Engineering)

Farzaneh Radmanesh (University of Twente)

Annemieke Kolkman (KWR Water Research Institute)

Dennis Vughs (KWR Water Research Institute)

Emile Cornelissen (Universiteit Gent, Nanyang Technological University, KWR Water Research Institute)

Jan Post (Wetsus, European Centre of Excellence for Sustainable Water Technology)

Walter van der Meer (University of Twente, Oasen)

Research Group
BT/Environmental Biotechnology
DOI related publication
https://doi.org/10.1016/j.watres.2019.01.042 Final published version
More Info
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Publication Year
2019
Language
English
Research Group
BT/Environmental Biotechnology
Volume number
154
Pages (from-to)
34-44
Downloads counter
17
Collections
Institutional Repository
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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.