Electrochemical Determination of Lead Using A Composite Sensor Obtained from Low-Cost Green Materials:Graphite/Cork

Autor(es)

Silva, Iasmin B. ^[1] ; de Araujo, Danyelle Medeiros ^[2] ; Vocciante, Marco ^[3] ; Ferro, Sergio ^[4] ; Martinez-Huitle, Carlos A. ^[1] ; Dos Santos, Elisama V. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio Grande do Norte, Inst Quim, Lab Eletroquim Ambiental & Aplicada, BR-59072900 Natal, RN - Brazil

^[2] Univ Estado Rio Grande do Norte, Dept Quim, Lab Eletroquim & Quim Analit, BR-59610210 Mossoro - Brazil

^[3] Univ Genoa, Dept Chem & Ind Chem, I-16124 Genoa - Italy

^[4] Ecas4 Australia Pty Ltd, Mile End South 5031 - Australia

• Tipo de documento: Artigo Científico
• Fonte: APPLIED SCIENCES-BASEL; v. 11, n. 5 MAR 2021.
• Citações Web of Science: 0

Resumo

The purpose of this study was to develop an inexpensive, simple, and highly selective cork-modified carbon paste electrode for the determination of Pb(II) by differential pulse anodic stripping voltammetry (DPASV) and square-wave anodic stripping voltammetry (SWASV). Among the cork-graphite electrodes investigated, the one containing 70% w/w carbon showed the highest sensitivity for the determination of Pb(II) in aqueous solutions. Under SWASV conditions, its linear range and relative standard deviation are equal to 1-25 mu M and 1.4%, respectively; the limit of detection complies with the value recommended by the World Health Organization. To optimize the operating conditions, the selectivity and accuracy of the analysis were further investigated by SWASV in acidic media. Finally, the electrode was successfully applied for the determination of Pb(II) in natural water samples, proving to be a sensitive electrochemical sensor that meets the stringent environmental control requirements. (AU)

• 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: 19/13113-4 - Processos foto (eletro) catalíticos e fotoeletro-fenton para eliminar contaminantes emergentes de águas de rejeito industriais
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Regular