Trabalho apresentado em evento
Assessing the SiO2, Al2O3, Fe2O3, P2O5 and TiO2 contents in Brazilian soils via portable X-ray fluorescence equipment
Carregando...
Notas
Data
Orientadores
Editores
Coorientadores
Membros de banca
Título da Revista
ISSN da Revista
Título de Volume
Editor
Faculdade, Instituto ou Escola
Departamento
Programa de Pós-Graduação
Agência de fomento
Tipo de impacto
Áreas Temáticas da Extenção
Objetivos de Desenvolvimento Sustentável
Dados abertos
Resumo
For Brazilian soils classification, mainly for Latosols (Oxisols), the
determination of SiO2, Al2O3 and Fe2O3 is required. Additionally, the
P2O5 and TiO2 are also commonly quantified for soil surveys. The
conventional analysis is based on determination by colorimetric,
gravimetric, and titration based methods or by using atomic
absorption spectrometry (AAS) and inductively coupled plasma
emission (ICP) after soil digestion using sulfuric acid. This analysis is
completely non-environmentally-friendly, time-consuming and
generates a great amount of pollutant residues. The portable X-ray
fluorescence equipment (pXRF), still incipient in Brazil, can greatly
contribute to soil characterization, in-field or in in-lab conditions. This
work used pXRF for determination of SiO2, Al2O3, Fe2O3, P2O5 and
TiO2 in 156 disturbed air-dried soil samples (< 2 mm). The soil samples
were selected from a soil collection of Soil Science Department,
Federal University of Lavras, Brazil. In all soil samples the P2O5
concentration was below the detection limit. A poor correlation was
observed between SiO2 and Al2O3 obtained by pXRF and the
conventional analysis. However, an excellent correlation (R2>0.98)
was found for Fe2O3 and TiO2. Others studies indicated that Fe2O3
determination by pXRF is not significantly influenced by soil moisture.
This is interesting for determination directly in the field any time.
Abstract
Descrição
Área de concentração
Agência de desenvolvimento
Palavra chave
Marca
Objetivo
Procedência
Impacto da pesquisa
Resumen
Palavras-chave
ISBN
DOI
Citação
RIBEIRO, B. T. et al. Assessing the SiO2, Al2O3, Fe2O3, P2O5 and TiO2 contents in Brazilian soils via portable X-ray fluorescence equipment. In: WORLD CONGRESS OF SOIL SCIENCE, 21, 2018, Rio de Janeiro. Proceedings... Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2018. v. 2, p. 236.