5 documents found, page 1 of 1
Optimization of Heterogeneous Photosensitized Oxidation for Winery Effluent Tre...
Silva, Mariana; Oliveira-Inocêncio, Inês; Martins, Rui C.; Quinta-Ferreira, Rosa M.; Gmurek, Marta; Nogueira, Anabela Gonçalves; Castro-Silva, SérgioIn this study, the heterogeneous photosensitized oxidation treatment of winery effluents was optimized using chitosan carriers immobilized with Zn(II) Phthalocyanine tetrasulfonic acid. The influence of main operating parameters such as initial pH, aeration flow rate, photocatalyst load, and concentration of the photosensitizer used in the photocatalysts’ preparation was investigated. Results for chemical oxyge...
Homogeneous Photosensitized Oxidation for Water Reuse in Cellars: A Study of Di...
Santos, Andreia D.; Gonçalves, Diana; Martins, Rui C.; Gmurek, Marta; Nogueira, Anabela Gonçalves; Castro-Silva, Sérgio; Castro, Luís M. M. N.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, Z...
Advanced oxidation processes at ambient conditions for olive oil extraction ind...
Domingues, Eva; Fernandes, Eryk; Gomes, João; Castro-Silva, Sérgio; Martins, Rui C.The olive mills are theoretically waste free plants, at the refined oil extraction units, a highly pollutant effluent is generated. In this work the performance of different AOPs in the same multiphase reactor was evaluated to minimize real oil extraction effluent environmental impact. In terms of COD removal, the combination of Fenton and Ozone reaction simultaneously, allows the highest reduction (58.5%) alth...
Ozonation and UV254nm radiation for the removal of microorganisms and antibioti...
Sousa, José M.; Macedo, Gonçalo; Pedrosa, Marta; Becerra-Castro, Cristina; Castro-Silva, Sérgio; Pereira, M. Fernando R.; Silva, Adrián M. T.Conventional wastewater treatment has a limited capacity to reduce antibiotic resistant bacteria and genes (ARB&ARG). Tertiary treatment processes are promising solutions, although the transitory inactivation of bacteria may select ARB&ARG. This study aimed at assessing the potential of ozonation and UV254nm radiation to inactivate cultivable fungal and bacterial populations, and the selected genes 16S rRNA (co...
Photocatalytic ozonation of urban wastewater and surface water using immobilize...
Moreira, Nuno F.F.; Sousa, José M.; Macedo, Gonçalo; Ribeiro, Ana R.; Barreiros, Luisa; Pedrosa, Marta; Faria, Joaquim L.; Pereira, M. Fernando R.Photocatalytic ozonation was employed for the first time in continuous mode with TiO2-coated glass Raschig rings and light emitting diodes (LEDs) to treat urban wastewater as well as surface water collected from the supply area of a drinking water treatment plant (DWTP). Different levels of contamination and types of contaminants were considered in this work, including chemical priority substances (PSs) and con...