Combination of Photoelectrocatalysis and Ozonation as a Good Strategy for Organics Oxidation and Decreased Toxicity in Oil-Produced Water

Autor(es)

de Brito, Juliana Ferreira ^[1] ; Bessegato, Guilherme Garcia ^[1] ; Fraga de Toledo e Souza, Pedro Rafael ^[1] ; Viana, Tais Suelen ^[2] ; de Oliveira, Danielle Palma ^[2] ; Martinez-Huitle, Carlos Alberto ^[3] ; Boldrin Zanoni, Maria Valnice ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Inst Quim, BR-14800060 Araraquara, SP - Brazil

^[2] Univ Sao Paulo, Escola Ciencias Farmaceut Ribeirao Preto, BR-14040903 Ribeirao Preto, SP - Brazil

^[3] Univ Fed Rio Grande Norte UFRN, Inst Quim, BR-59078970 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Electrochemical Society; v. 166, n. 5, p. H3231-H3238, FEB 12 2019.
• Citações Web of Science: 1

Resumo

The oil-produced water generated during drilling of oil wells and gas extraction has been a cause for great concern since it contains a complexmixture of different organic and inorganic compounds, large amount of CO2, grease, salts, minerals, oils, and many hazardous compounds. The present work investigates the efficiency of photocatalysis (PC), photoelectrocatalysis (PEC), ozonation (O-3), and photoelectrocatalysis coupled with ozonation (PEC+O-3) in the removal of organic and inorganic contaminants in the oil-produced water monitored by Gas Chromatography-Mass Spectrometry (GC-MS) and Ionic Chromatography (IC) techniques. Parameters such as toxicity, which was investigated using Zebrafish embryos, color, turbidity, pH, quantity of dissolved solids, conductivity, chemical oxygen demand (COD), and concentrations of organic and inorganic carbon were also investigated. The best results were obtained by coupling PEC and O-3 techniques, which presented superior reduction in color (98%), turbidity (100%), inorganic carbon (99%), COD (73%), and a decrease of 96% in the fluoride and 35% in the chloride detected previously in the real oil-produced water. Among the 12 organic compounds identified in the oil-produced water, the PEC+O-3 treatment reached complete oxidation in eight of them and a lower Zebrafish embryo mortality occurred with 12.5% of dilution after 2 h treatment. (C) The Author(s) 2019. Published by ECS. (AU)

• Processo FAPESP: 14/03679-7 - Degradação de corantes de cabelo e efluentes de salão de beleza por fotoeletrocatálise com eletrodos de nanotubos de TiO2 modificados e combinação com ozonização
• Beneficiário: Guilherme Garcia Bessegato
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 15/18109-4 - Contribuição dos Materiais Nanoestruturados na Eletroanálise de Fármacos e Corantes, na Oxidação e Redução Fotoeletrocatalítica de Poluentes Orgânicos e Inorgânicos e Desinfecção de Água
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/25343-8 - Oxidação Simultânea de Compostos Orgânicos da Água Residual de Petróleo e Redução de CO2 Dissolvido por Fotoeletrocatálise
• Beneficiário: Juliana Ferreira de Brito
• Modalidade de apoio: Bolsas no Brasil - Doutorado