High sensitive phosphorene and molecular imprinted polymers electrochemical sensor to determine benzene in oilfield-produced water

Autor(es)

de Souza, Joao Carlos ; Silva, Joao Pedro ; Zanoni, Maria Valnice Boldrin ; de Andrade, Adalgisa Rodrigues

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 12, n. 1, p. 11-pg., 2023-12-26.

Resumo

A new electrochemical sensor based on a carbon screen-printed electrode (CSPE) modified with phosphorene (BP) and PEDOT:PSS (BP-PEDOT:PSS) and molecularly imprinted polymers (MIPs) composed of poly(o-phe-nylenediamine) has been developed and applied to determine low benzene concentrations in oilfield-produced water (OPW). Morphological and electrochemical characterization of the sensor confirmed that the CSPE sur -face was modified with BP-PEDOT:PSS and MIPs. CSPE modification with BP-PEDOT:PSS increased the elec-trochemical current by 24.8%. Under optimized conditions, the sensor presented analytical curves with two linear ranges from 4.0 x 10-8 to 1.0 x 10-7 mol L-1 and from 2.0 x 10-7 to 1.0 x 10-6 mol L-1. The limit of detection, limit of quantification, and sensitivity were 7.4 x 10-9 mol L-1, 2.3 x 10-8 mol L-1, and 36.4 A L mol-1 (n = 3), respectively. The sensor showed good interday and intraday repeatability, with RSD values of 3.4% and 4.9%, respectively. Its stability was excellent, preserving 90.7% of its initial current after storage at room temperature and in contact with the ambient atmosphere for 15 days. The sensor also displayed excellent selectivity for the benzene molecule in the presence of interferents (o-xylene, m-xylene, phenol, and toluene). The proposed method was validated by comparison using the technique of gas chromatography coupled to flame injection detection (GC-FID) and successfully applied to determine benzene in an OPW sample. (AU)

• Processo FAPESP: 21/12866-9 - Desenvolvimento de sensores eletroquímicos utilizados na detecção eletroquímica de BTEXs em águas residuais de petróleo autoalimentados por uma célula a combustível microbiana: detecção de BTEXs, tratamento e produção de energia
• Beneficiário: João Carlos de Souza
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 21/01134-7 - Valorização eletroquímica da molécula de glicerol: desenvolvimento de uma célula eletrolítica microbiana (MEC) para produção de bio-hidrogênio (Bio-H2) e produtos de alto valor agregado em uma célula do tipo PEM
• Beneficiário: Adalgisa Rodrigues de Andrade
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - 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