Intensification of UV-C tertiary treatment : Disinfection and removal of micropollutants by sulfate radical based Advanced Oxidation Processes

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Rodriguez-Chueca , J , Garcia-Canibano , C , Lepistö , R -J , Encinas , A , Pellinen , J & Marugan , J 2019 , ' Intensification of UV-C tertiary treatment : Disinfection and removal of micropollutants by sulfate radical based Advanced Oxidation Processes ' , Journal of Hazardous Materials , vol. 372 , pp. 94-102 . https://doi.org/10.1016/j.jhazmat.2018.04.044

Title: Intensification of UV-C tertiary treatment : Disinfection and removal of micropollutants by sulfate radical based Advanced Oxidation Processes
Author: Rodriguez-Chueca, J.; Garcia-Canibano, C.; Lepistö, R. -J.; Encinas, A.; Pellinen, J.; Marugan, J.
Contributor: University of Helsinki, University Management
Date: 2019-06-15
Language: eng
Number of pages: 9
Belongs to series: Journal of Hazardous Materials
ISSN: 0304-3894
URI: http://hdl.handle.net/10138/330182
Abstract: This study explores the enhancement of UV-C tertiary treatment by sulfate radical based Advanced Oxidation Processes (SR-AOPs), including photolytic activation of peroxymonosulfate (PMS) and persulfate (PS) and their photocatalytic activation using Fe(II). Their efficiency was assessed both for the inactivation of microorganisms and the removal or micropollutants (MPs) in real wastewater treatment plant effluents. Under the studied experimental range (UV-C dose 5.7-57 J/L; UV-C contact time 3 to 28 s), the photolysis of PMS and PS (0.01 mM) increased up to 25% the bacterial removal regarding to UV-C system. The photolytic activation of PMS led to the total inactivation of bacteria (approximate to 5.70 log) with the highest UV-C dose (57 J/L). However, these conditions were insufficient to remove the MPs, being required oxidant's dosages of 5 mM to remove above 90% of carbamazepine, diclofenac, atenolol and triclosan. The best efficiencies were achieved by the combination of PMS or PS with Fe(II), leading to the total removal of the MPs using a low UV-C dosage (19 J/L), UV-C contact time (9 s) and reagent's dosages (0.5 mM). Finally, high mineralization was reached ( > 50%) with photocatalytic activation of PMS and PS even with low reagent's dosages.
Subject: SR-AOPs
UV-C
Disinfection
Micropollutants
Real wastewater
WATER TREATMENT PLANTS
URBAN WASTE-WATER
ESCHERICHIA-COLI
PHOTOCATALYTIC DISINFECTION
SOLAR DISINFECTION
HYDROXYL RADICALS
PHOTO-FENTON
DEGRADATION
ACTIVATION
PHARMACEUTICALS
1172 Environmental sciences
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