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Cited by 78Water Treatment and DisinfectionAdvanced oxidation water treatmentTiO2 Photocatalysis and Solar Cells

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Photodegradation of haloacetic acids in water

Lifongo, Lydia L., Bowden, Derek J., Brimblecombe, Peter·2004·Chemosphere
DOI 10.1016/j.chemosphere.2003.11.006
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Abstract

The global distribution and high stability of some haloacetic acids (HAAs) has prompted concern that they will tend to accumulate in surface waters and pose threats to humans and the ecosystem. It is important to study the degradation pathways of HAAs in aqueous systems to understand their ecotoxicological effects. Previous studies involving thermal degradation reactions show relatively long lifetimes for HAAs in the natural environment. Photolysis and photocatalytic dissociation are potentially efficient routes for the degradation of HAAs such as trichloroacetic acid to hydrochloric acid, carbon dioxide and chloroform, although such processes are poorly understood in surface waters. In our present study, we have used light to degrade the HAAs in the presence of titanium dioxide suspensions. All chloro and bromo HAAs degrade in photocatalysis experiments and the rate of degradation is directly proportional to the number of halogen atoms in the acid molecule. The half-lives of the HAAs from the photodegradation at 15 degrees C in the presence of suspended titanium dioxide photocatalyst are 8, 14, 83 days for the tri-, di- and mono-bromoacetic acids. Tri-, di- and mono-chloroacectic acids have half-lives of 6, 10 and 42 days respectively. The mixed bromochloro and chlorodifluoroacetic acids degrade with half-lives of 18 and 42 days respectively. Our results therefore suggest that the photocatalytic process can provide an additional degradation pathway for the HAAs in natural waters.

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Metadata

Authors
Lifongo, L. L., Bowden, D. J., & Brimblecombe, P.
Affiliations
University of East Anglia (GB)
Corresponding author
Brimblecombe, Peter
ORCID
Brimblecombe, Peter
Venue
Chemosphere
Publisher
Elsevier BV
Published
2004-04
Volume
55
Issue
3
Pages
467-476
ISSN
0045-6535 (ISSN-L)
DOI
10.1016/j.chemosphere.2003.11.006
OpenAlex
W2042113356
Cited by
78
References
0
Citations by year
2026: 1 · 2025: 4 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 2 · 2020: 4 · 2019: 6 · 2018: 6 · 2017: 9 · 2016: 5 · 2015: 4 · 2014: 1 · 2013: 2 · 2012: 3
FWCI
2.09
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
  • Chemosphere (publishedVersion)
  • PubMed (publishedVersion)
  • UEA Digital Repository (University of East Anglia) (submittedVersion)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Water Treatment and Disinfection
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
Keywords
haloacetic acids, photodegradation, photocatalysis, titanium dioxide, trichloroacetic acid, bromoacetic acid, chloroacetic acid, half-life, degradation pathways, surface water contamination, chloroform formation
MeSH terms
Acetates, Halogens, Kinetics, Photolysis, Temperature, Titanium, Water, Water Purification

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CoChat. (2026). Citation check: Photodegradation of haloacetic acids in water. https://app.cochat.ai/papers/10.1016/j.chemosphere.2003.11.006
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Lifongo, L. L., Bowden, D. J., & Brimblecombe, P. (2004). Photodegradation of haloacetic acids in water. Chemosphere. https://doi.org/10.1016/j.chemosphere.2003.11.006