Curbing chlorine disinfection byproduct formation with a biomimetic FeTAML oxidation catalyst

We demonstrate, by bench-scale chlorination of local tap water containing phenol (16 μM, 1.5 ppm) as a model organic micropollutant, that the [Fe(TAML)] − catalyst (TAML = tetra amido macrocyclic ligand) increases the rate of phenol decomposition and suppresses the build-up of chlorophenol disinfect...

Full description

Saved in:
Bibliographic Details
Published in:Environmental science water research & technology 2024-02, Vol.1 (2), p.48-489
Main Authors: McPherson, James N, Larsen, Freja Troj, Lind, Maja Juncher, Miller, Christopher J, Waite, T. David, McKenzie, Christine J, Lauritsen, Frants R
Format: Article
Language:English
Subjects:
Biomimetics
By-products
Byproducts
Catalysts
Chlorination
Chlorine
Chlorophenol
Disinfection
Drinking water
Halogenation
Hydrogen atoms
Hydrophobicity
Inlets (waterways)
Iron
Mass spectrometry
Mass spectroscopy
Oxidation
Phenols
Sample preparation
Trihalomethanes
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrate, by bench-scale chlorination of local tap water containing phenol (16 μM, 1.5 ppm) as a model organic micropollutant, that the [Fe(TAML)] − catalyst (TAML = tetra amido macrocyclic ligand) increases the rate of phenol decomposition and suppresses the build-up of chlorophenol disinfection byproducts. Specifically, significantly lower concentrations of trihalomethanes (1.0-2.1 ppb) were formed in the presence of [Fe(TAML)] − compared to those formed in the absence of the catalyst (39-78 ppb). Hydrophobic disinfection byproducts (1-2000 ppb) were monitored in real-time and without any sample preparation using membrane inlet mass spectrometry. This work encourages the incorporation of biomimetic iron catalysts into existing chlorine disinfection processes to harness the oxidative power of chlorine through oxygen- or hydrogen-atom transfer reactions instead of the problematic halogenation reactions which yield disinfection byproducts. An [Fe(TAML)] − catalyst boosts the oxidising power of chlorine disinfectants to clear a model organic pollutant and inhibits formation of trihalomethane disinfection byproducts.
ISSN:2053-1400
2053-1419
DOI:10.1039/d3ew00518f