Enhanced degradation of emerging contaminants by Far-UVC photolysis of peracetic acid: Synergistic effect and mechanisms.

Autor: Hu CY; College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China., Hu LL; College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, PR China., Dong ZY; College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, PR China. Electronic address: zydong@shiep.edu.cn., Yang XY; College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, PR China., Liu H; College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, PR China., Chen JN; College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, PR China., Gao LM; College of Environmental and Chemical Engineering, Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, PR China.
Jazyk: angličtina
Zdroj: Water research [Water Res] 2024 Aug 15; Vol. 260, pp. 121943. Date of Electronic Publication: 2024 Jun 14.
DOI: 10.1016/j.watres.2024.121943
Abstrakt: Krypton chloride (KrCl*) excimer lamps (222 nm) are used as a promising irradiation source to drive ultraviolet-based advanced oxidation processes (UV-AOPs) in water treatment. In this study, the UV 222 /peracetic acid (PAA) process is implemented as a novel UV-AOPs for the degradation of emerging contaminants (ECs) in water. The results demonstrate that UV 222 /PAA process exhibits excellent degradation performance for carbamazepine (CBZ), with a removal rate of 90.8 % within 45 min. Notably, the degradation of CBZ in the UV 222 /PAA process (90.8 %) was significantly higher than that in the UV 254 /PAA process (15.1 %) at the same UV dose. The UV 222 /PAA process exhibits superior electrical energy per order (EE/O) performance while reducing resource consumption associated with the high-energy UV 254 /PAA process. Quenching experiments and electron paramagnetic resonance (EPR) detection confirm that HO• play a dominant role in the reaction. The contributions of direct photolysis, HO•, and other active species (RO• and 1 O 2 ) are estimated to be 5 %, 88 %, and 7 %, respectively. In addition, the effects of Cl - , HCO 3 - , and humic acid (HA) on the degradation of CBZ are evaluated. The presence of relatively low concentrations of Cl - , HCO 3 - , and HA can inhibit CBZ degradation. The UV 222 /PAA oxidation process could also effectively degrade several other ECs (i.e., iohexol, sulfamethoxazole, acetochlor, ibuprofen), indicating the potential application of this process in pollutant removal. These findings will propel the development of the UV 222 /PAA process and provide valuable insights for its application in water treatment.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier Ltd.)
Databáze: MEDLINE
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