Multi-elemental analysis of landfill leachates by single and double pulse laser-induced breakdown spectroscopy

Autor(es)

Marangoni, Bruno S. ^[1] ; Nicolodelli, Gustavo ^[2] ; Senesi, Giorgio S. ^[3] ; Fonseca, Nielsen ^[4] ; Izario Filho, Helcio J. ^[4] ; Xavier, Alfredo Augusto ^[5] ; Villas-Boas, Paulino R. ^[5] ; Milori, Debora M. B. P. ^[5] ; Menegatti, Carlos R. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Mato Grosso do Sul, Phys Inst, POB 549, BR-79070900 Campo Grande, MS - Brazil

^[2] Univ Fed Santa Catarina, Dept Phys, Florianopolis, SC - Brazil

^[3] CNR, Ist Sci & Tecnol Plasmi ISTP, Sede Bari, Via Amendola 122-D, I-70126 Bari - Italy

^[4] Univ Sao Paulo, Sch Engn Lorena, POB 116, BR-12602810 Sao Paulo - Brazil

^[5] Embrapa Instrumentat, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microchemical Journal; v. 165, JUN 2021.
• Citações Web of Science: 0

Resumo

In this work, the potential of single and double-pulse laser induced breakdown spectroscopy (SP and DP LIBS) has been investigated for multi-elemental analysis of the elements manganese, zinc, arsenic and lead in landfill leachates. Instrumental parameters such as detection delay and interpulse delay times were investigated in order to find the optimal operating values for multi-elemental analysis. The following emission lines were used: Mn II: 257.61; 259.37 and 260.56 nm; Zn II: 206.20 nm and Zn I: 213.85 nm; As I: 228.81; 234.98 nm and Pb I: 405.78 nm. All elements showed a strong enhancement factor (2.5) of DP LIBS signal intensities compared to SP LIBS. Analyses were performed using a background correction and the sum of the areas below each element emission lines. The limits of detection (LODs) achieved by SP LIBS were: 21.3, 77.5, 89.3, 38.9 mgkg? 1 and for DP LIBS: 7.1, 13.4, 11.9 and 7.3 mgkg? 1 respectively for Mn, Zn, As and Pb. The LOD values achieved by DP LIBS were improved by factors of 3, 6, 7.5 and 5 times respectively for Mn, Zn, As and Pb, with respect to SP LIBS. The average quantification errors were 7.5, 19.6, 38.2 and 28% for SP LIBS and 9.2, 21.3, 12.9 and 14.4% for DP LIBS respectively for Mn, Zn, As and Pb. The LIBS approach was demonstrated to be suitable for quantitative analysis of toxic elements and sufficiently fast for real time continuous monitoring of landfill leachates. (AU)

• Processo FAPESP: 17/19248-3 - Utilização da técnica LIBS para estudo de metais pesados em amostras de percolado líquido
• Beneficiário: Carlos Renato Menegatti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07276-1 - CEPOF - Centro de Pesquisa em Óptica e Fotônica
• Beneficiário: Vanderlei Salvador Bagnato
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs