Bromide-mediated enhancement of far-UVC/peracetic acid process for selective micropollutant abatement
Abstract
Far‑ultraviolet 222 nm (UV ₂₂₂ ) effectively activates oxidants to degrade organic micropollutants (OMPs) in advanced oxidation processes (AOPs), but its synergy and ecotoxicity with bromide (Br ⁻ ) are unclear. This study investigates the synergy of peracetic acid (PAA) and Br ⁻ by UV ₂₂₂ (UV ₂₂₂ -PB) for OMPs degradation. The system’s fluence-based rate constant for model pollutants (0.0159 cm ² ·mJ ⁻¹ ) is 3.01 and 15.74 times that of UV ₂₅₄ -PB and UV ₃₆₅ -PB. Radical and theoretical analyses show that far‑ultraviolet strengthens the interaction between PAA and Br ⁻ , prolongs radical chains, and boosts organic radicals and reactive bromine species, dominating electron‑rich OMPs oxidation. Correlations of ln( k obs ) with vertical ionization potential and highest occupied molecular orbital energy for 10 OMPs confirm selective oxidation. UV ₂₂₂ -PB performs robustly in various water matrices and shows low ecotoxicity in assays such as seed germination and zebrafish embryo. Life cycle assessment confirms its sustainability. These findings offer insights and guidance for UV ₂₂₂ -based AOPs in brominated water treatment.
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BibTeX
@article{zeng2026bromidemediated,
title = {{Bromide-mediated enhancement of far-UVC/peracetic acid process for selective micropollutant abatement}},
author = {Genying Zeng and Guoyu Li and Hou Wang and Chen Zhang and Qiang Chen and Qinyuan Tang and Tangshan Wu and Li Li and Xinjiang Hu and Ran Yin and Xiaofei Tan},
journal = {Nature Communications},
year = {2026},
month = oct,
doi = {10.1038/s41467-026-78410-2},
url = {https://www.nature.com/articles/s41467-026-78410-2},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Bromide-mediated enhancement of far-UVC/peracetic acid process for selective micropollutant abatement
AU - Genying Zeng
AU - Guoyu Li
AU - Hou Wang
AU - Chen Zhang
AU - Qiang Chen
AU - Qinyuan Tang
AU - Tangshan Wu
AU - Li Li
AU - Xinjiang Hu
AU - Ran Yin
AU - Xiaofei Tan
PY - 2026
DA - 2026/10/08
JO - Nature Communications
DO - 10.1038/s41467-026-78410-2
UR - https://www.nature.com/articles/s41467-026-78410-2
AB - Far‑ultraviolet 222 nm (UV ₂₂₂ ) effectively activates oxidants to degrade organic micropollutants (OMPs) in advanced oxidation processes (AOPs), but its synergy and ecotoxicity with bromide (Br ⁻ ) are unclear. This study investigates the synergy of peracetic acid (PAA) and Br ⁻ by UV ₂₂₂ (UV ₂₂₂ -PB) for OMPs degradation. The system’s fluence-based rate constant for model pollutants (0.0159 cm ² ·mJ ⁻¹ ) is 3.01 and 15.74 times that of UV ₂₅₄ -PB and UV ₃₆₅ -PB. Radical and theoretical analyses show that far‑ultraviolet strengthens the interaction between PAA and Br ⁻ , prolongs radical chains, and boosts organic radicals and reactive bromine species, dominating electron‑rich OMPs oxidation. Correlations of ln( k obs ) with vertical ionization potential and highest occupied molecular orbital energy for 10 OMPs confirm selective oxidation. UV ₂₂₂ -PB performs robustly in various water matrices and shows low ecotoxicity in assays such as seed germination and zebrafish embryo. Life cycle assessment confirms its sustainability. These findings offer insights and guidance for UV ₂₂₂ -based AOPs in brominated water treatment.
SN - 2041-1723
ER -