Homogeneous Photosensitized Oxidation for Water Reuse in Cellars: A Study of Different Photosensitizers
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Published:2023-04-19
Issue:8
Volume:15
Page:6861
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ISSN:2071-1050
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Container-title:Sustainability
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language:en
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Short-container-title:Sustainability
Author:
Santos Andreia D.12ORCID, Gonçalves Diana1ORCID, Martins Rui C.1ORCID, Gmurek Marta3ORCID, Nogueira Anabela4ORCID, Castro-Silva Sérgio4ORCID, Castro Luis M.125ORCID, Quinta-Ferreira Rosa1
Affiliation:
1. CIEPQPF—Chemical Engineering Processes and Forest Products Research Center, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Rua Sílvio Lima—Polo II, 3030-790 Coimbra, Portugal 2. Polytechnic Institute of Coimbra, Coimbra Institute of Engineering, Department of Chemical and Biological Engineering, Rua Pedro Nunes—Quinta da Nora, 3030-199 Coimbra, Portugal 3. Department of Molecular Engineering, Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland 4. Adventech, Lda, Rua de Fundões, 151, 3700-121 São João da Madeira, Portugal 5. SISus—Laboratory of Sustainable Industrial Systems, Coimbra Institute of Engineering, Department of Chemical and Biological Engineering, Rua Pedro Nunes—Quinta da Nora, 3030-199 Coimbra, Portugal
Abstract
The demand for fresh water is increasing daily, requiring industries to take action to reduce the need for fresh water. Winemaking industries represent a massive hydric impact by combining the water consumed and the high volume of wastewater produced. The sun-driven photooxidation process has been widely employed in removing wastewater pollutants. This work employed four photosensitizers, Rose Bengal, AlPcS4, ZnPcS4, and TPP, for water reuse in cellars. A secondary effluent has been investigated as a water matrix. Of all the photosensitizers (PS) employed, ZnPcS4 showed better chemical oxygen demand (COD) (23%) and phenolic (TPh) (81%) removal. The effect of pH and concentration was also assessed for ZnPcS4. The phenolic content removal was found to be highly dependent on the solution’s pH, as alkaline solutions improve the singlet oxygen quantum yield where the use of a pH = 11 reached 42% and 81% of COD and TPH removal. However, a pH higher than 7 showed higher PS bleaching than pH = 7. Three different PS concentrations were evaluated: 3 × 10−6, 5 × 10−6, and 1 × 10−5 mol/L. The optimal PS concentration was found to be 5 × 10−6 mol/L.
Funder
Project SAFE—Water recovery in cellars using photosensitized oxidation
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference64 articles.
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