Evaluation of LIBS under controlled atmosphere to quantify cadmium at low concentration in landfill leachates

Autor(es)

Menegatti, Carlos R. ^[1] ; Nicolodelli, Gustavo ^[2] ; Senesi, Giorgio S. ^[3] ; da Silva, Otavio A. ^[1] ; Filho, I, Helcio J. ; Villas-Boas, Paulino R. ^[4] ; Marangoni, Bruno S. ^[2] ; Milori, Debora M. B. P. ^[4]

Afiliação do(s) autor(es)

^[1] I, Univ Sao Paulo, Sch Engn Lorena, POB 116, BR-12602810 Lorena, SP - Brazil

^[2] Univ Fed Mato Grosso do Sul, Phys Inst, POB 549, BR-79070900 Campo Grande, MS - Brazil

^[3] CNR, ISTP, Via Amendola 122-D, I-70126 Bari - Italy

^[4] Embrapa Instrumentat, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED PHYSICS B-LASERS AND OPTICS; v. 125, n. 5 MAY 2019.
• Citações Web of Science: 1

Resumo

Laser-induced breakdown spectroscopy (LIBS) is a fast, relatively simple and precise alternative technique to measure heavy metal concentrations in solid, liquid and gaseous materials with limits of detection compatible with the recommended values for soil and water quality criteria. In this paper, a conventional LIBS apparatus has been used for the quantitative analysis of cadmium (Cd) in a landfill leachate under controlled atmospheric and reduced pressure (100 Torr) conditions. LIBS analysis was performed using a background correction and the sum of the areas above the three Cd transitions peaks (Cd II at 214.44 nm; Cd II at 226.50 nm and Cd I at 228.80 nm). Under reduced pressure the linear correlation of the calibration curve increased from 0.96 to 0.99, with respect to the atmospheric pressure. The limit of detection for Cd improved by a factor of 5, from 5 to 1 mg kg(-1), and the concentrations measured by LIBS were assessed by complementary induced coupled plasma-optical emission spectroscopy (ICP-OES). These results indicated that LIBS under controlled atmosphere can be recommended for the analytical quantification of Cd in landfill leachates. (AU)

• 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
• 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