Cited by 1,049Advanced oxidation water treatmentWater Treatment and DisinfectionAdvanced Photocatalysis Techniques

Comparison of Halide Impacts on the Efficiency of Contaminant Degradation by Sulfate and Hydroxyl Radical-Based Advanced Oxidation Processes (AOPs)

Yang, Yi, Pignatello, Joseph J., Ma, Jun, Mitch, William A.·2014·Environmental Science & Technology

Abstract

The effect of halides on organic contaminant destruction efficiency was compared for UV/H2O2 and UV/S2O8(2-) AOP treatments of saline waters; benzoic acid, 3-cyclohexene-1-carboxylic acid, and cyclohexanecarboxylic acid were used as models for aromatic, alkene, and alkane constituents of naphthenic acids in oil-field waters. In model freshwater, contaminant degradation was higher by UV/S2O8(2-) because of the higher quantum efficiency for S2O8(2-) than H2O2 photolysis. The conversion of (•)OH and SO4(•-) radicals to less reactive halogen radicals in the presence of seawater halides reduced the degradation efficiency of benzoic acid and cyclohexanecarboxylic acid. The UV/S2O8(2-) AOP was more affected by Cl(-) than the UV/H2O2 AOP because oxidation of Cl(-) is more favorable by SO4(•-) than (•)OH at pH 7. Degradation of 3-cyclohexene-1-carboxylic acid, was not affected by halides, likely because of the high reactivity of halogen radicals with alkenes. Despite its relatively low concentration in saline waters compared to Cl(-), Br(-) was particularly important. Br(-) promoted halogen radical formation for both AOPs resulting in ClBr(•-), Br2(•-), and CO3(•-) concentrations orders of magnitude higher than (•)OH and SO4(•-) concentrations and reducing differences in halide impacts between the two AOPs. Kinetic modeling of the UV/H2O2 AOP indicated a synergism between Br(-) and Cl(-), with Br(-) scavenging of (•)OH leading to BrOH(•-), and further reactions of Cl(-) with this and other brominated radicals promoting halogen radical concentrations. In contaminant mixtures, the conversion of (•)OH and SO4(•-) radicals to more selective CO3(•-) and halogen radicals favored attack on highly reactive reaction centers represented by the alkene group of 3-cyclohexene-1-carboxylic acid and the aromatic group of the model compound, 2,4-dihydroxybenzoic acid, at the expense of less reactive reaction centers such as aromatic rings and alkane groups represented in benzoic acid and cyclohexanecarboxylic acid. This effect was more pronounced for the UV/S2O8(2-) AOP.

Integrity signals

Registry

Crossref · 10.1021/es404118q

Cites

33 of 33 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Yang, Y., Pignatello, J. J., Ma, J., & Mitch, W. A.
Affiliations
  • Harbin Institute of Technology (CN)
  • Connecticut Agricultural Experiment Station (US)
  • Stanford University (US)
Corresponding author
  • Ma, Jun
  • Mitch, William A.
Venue
Environmental Science & Technology
Published
2014-02-18
Volume
48
Issue
4
Pages
2344-2351
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2321178107
Cited by
1,049
References
33
Citations by year
2026: 57 · 2025: 104 · 2024: 121 · 2023: 91 · 2022: 150 · 2021: 115 · 2020: 103 · 2019: 87 · 2018: 75 · 2017: 61 · 2016: 47 · 2015: 33 · 2014: 5
FWCI
37.03
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Water Treatment and Disinfection
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
Keywords
halide interference, advanced oxidation processes, sulfate radicals, hydroxyl radicals, UV/H2O2, naphthenic acids, produced water, saline water treatment, bromide, chloride, halogen radicals, radical reactivity, kinetic modeling, benzoic acid
MeSH terms
Carbonates, Cyclohexanecarboxylic Acids, Fresh Water, Halogens, Hydrogen Peroxide, Hydrogen-Ion Concentration, Kinetics, Oxidation-Reduction, Seawater, Sulfates, Time Factors, Ultraviolet Rays, Water Pollutants, Chemical, Hydroxyl Radical, Benzoic Acid, Cyclohexenes

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review