DEGRADAÇÃO DE CONTAMINANTES ORGÂNICOS UTILIZANDO MEMBRANAS POLIMÉRICAS FOTOCATALÍTICAS
DEGRADAÇÃO DE CONTAMINANTES ORGÂNICOS UTILIZANDO MEMBRANAS POLIMÉRICAS FOTOCATALÍTICAS
-
DOI: 10.22533/at.ed.17423031122
-
Palavras-chave: POA, fotocatálise, membranas, tratamento de águas
-
Keywords: AOP, photocatalysts, membrane, water treatment
-
Abstract: The recalcitrant organic contaminants are one of the water and effluent treatment preoccupations because their degradation does not happen with conventional treatment. The advanced oxidative process (AOP) and the membrane separation process (MSP) are two technologies in highlight that can degrade them. Combining these processes with nanoparticle impregnation in membranes, known as a hybrid process, can overcome the problems associated with AOP and MSP. Thus, this work aims to analyze and compare the dye degradation with the hybrid process MSP/AOP using a polymeric membrane functionalized with Fe0 (nZVI) and TiO2 nanoparticles. The Drimaren Red Dye (DRD) was used as a model contaminant to check the ideal operational conditions in this process. Permeated aliquots were removed from the system at specific times to evaluate removal of DRD and flow. The best condition for nZVI membrane was with pH control associated. In a process without UV light, the membrane previously mentioned achieved 30% DRD removal within 1 hour of operation. However, a process with UV light increased the DRD removal to 43%. On the other hand, in the membrane functionalized with TiO2, the DRD removal without UV light was 21% within 1 hour, and with UV light, the DRD removal was enhanced to 67%. The processes with UV light conducted for 2 hours reached 58% and 85% of the removal to nZVI and TiO2 membrane, respectively, which indicate the hybrid process with TiO2 nanoparticles' high effectivity. In the nZVI membrane, the condition without UV light presented an average stability of 0,21± 0,01 L/min in permeate flow, while with UV light, the flow increased from 0,14 to 0,47 L/min within 2 hours. Nevertheless, in the case of the TiO2 membrane, the flow remained steady at ~0,49 ± 0,06 L/min.
- Ana Clara Wanderlei do Espírito Santo
- Larissa Loureiro Salgueiro Silva
- Aline Marques Ferreira Linhares
- Cristiano Piacsek Borges
- Fabiana Valéria da Fonseca