cover image: Pilot-scale assessment of the viability of UVA radiation for H2O2 or S2O82− activation in advanced oxidation processes

20.500.12592/46couir

Pilot-scale assessment of the viability of UVA radiation for H2O2 or S2O82− activation in advanced oxidation processes

1 Dec 2023

UVA and UVC radiation were compared for the activation of H2O2 or S2O82− to remove micropollutants remaining in treated wastewater with a view to optimising the cost and/or the efficiency of the commonly studied UVC/H2O2 process. Experiments were carried out in a dynamic laboratory pilot (20 L). In a simple matrix, UVA radiation were able to produce oxydative radicals from H2O2 or S2O82−, although faster degradation of the estrogens was observed under UVC radiation (up to 55-fold). With both UV radiation, S2O82− was photolyzed faster than H2O2, resulting in faster estrogen degradation (up to 12-fold). Coupling UVA to H2O2 was considered not to be viable because <4 % of the compounds were degraded at 1000 mJ cm−2. In a treated wastewater, estrogen degradations were inhibited due to organic matter and stronger inhibitions were observed with S2O82− processes (up to 80 % inhibition compared to simple matrix). The UVC/S2O82−-process still achieved the fastest degradation rate, but is roughly comparable to the UVC/H2O2-process. Very low degradation rates obtained with UVA/S2O82− limit the interest in the process. Experiments were also carried out on a mixture of pharmaceuticals leading to similar conclusions.

Authors

Anaëlle Gabet, Christine de Brauer, Gilles Mailhot, Marcello Brigante, Hélène Métivier

Bibliographic Reference
Anaëlle Gabet, Christine de Brauer, Gilles Mailhot, Marcello Brigante, Hélène Métivier. Pilot-scale assessment of the viability of UVA radiation for H2O2 or S2O82− activation in advanced oxidation processes. Journal of Water Process Engineering, 2023, 56, pp.104328. &#x27E8;10.1016/j.jwpe.2023.104328&#x27E9;. &#x27E8;hal-04283686&#x27E9;
DOI
https://doi.org/10.1016/j.jwpe.2023.104328
HAL Collection
['Université de Clermont', 'CNRS - Centre national de la recherche scientifique', 'Institut National des Sciences Appliquées de Lyon', 'Institut de Chimie de Clermont-Ferrand', 'ACL en Sciences fondamentales', 'Institut de Chimie du CNRS', 'Laboratoire DEEP', 'Groupe INSA', 'UDL', 'Clermont Auvergne INP']
HAL Identifier
4294394
Institution
['Institut National des Sciences Appliquées de Lyon', 'Institut de Chimie - CNRS Chimie', 'Institut national polytechnique Clermont Auvergne']
Laboratory
['Déchets Eaux Environnement Pollutions', 'Institut de Chimie de Clermont-Ferrand']
Published in
France

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