Chemometric tools in chemical fractionation data of soil samples from five antarctic research stations

Autor(es)

Guerra, Marcelo B. B. ^[1] ; Rosa, Paula F. ^[1] ; Schaefer, Carlos E. G. R. ^{[2, 3]} ; Michel, Roberto F. M. ^{[2, 3, 4]} ; Almeida, Ivan C. ^{[2, 3]} ; Pereira-Filho, Edenir R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Quim, Grp Anal Instrumental Aplicada, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Cambridge, SPRI, Cambridge CB2 IER - England

^[3] Univ Fed Vicosa, Dept Ciencias Solo, BR-36570000 Vicosa, MG - Brazil

^[4] FEAM, BR-31630900 Belo Horizonte, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 23, n. 7, p. 1388+, JUL 2012.
• Citações Web of Science: 2

Resumo

The aim of this study was to carry out a broad chemical investigation of selected soil samples from Antarctica, near different Antarctic scientific stations. Soil samples collected in background reference sites, with minimal human impact, far away from the stations were used as control samples. Anthropogenic places at the vicinity of the following stations Frei Montalva and Escudero (Chile), Great Wall (China), Bellingshausen (Russia) and Artigas (Uruguay) were studied as a priori human impacted sites. The sequential extraction procedure (SEP) based on the BCR (Community Bureau of Reference) protocol was applied for Cu, Mn and Zn determination. With the help of PCA (principal component analysis) and PARAFAC (parallel factor analysis) methods, meaningful information was extracted from the raw data obtained from SEP procedure. Soil samples affected by the scientific stations are associated with higher heavy metal contents (especially Cu and Zn, between the investigated metals, in the most labile fractions of the SEP applied). This pollution signal is associated with diesel use for the energy generation by the Antarctic stations. (AU)

• Processo FAPESP: 07/04515-4 - Avaliação da combinação da espectrometria de absorção atômica com determinação sequencial e a espectrometria de absorção atômica com tubo na chama e aerossol térmico
• Beneficiário: Edenir Rodrigues Pereira Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 09/09481-6 - Avaliação das concentrações de cobre, manganês e zinco em solos da Antártica utilizando extração seqüencial e ferramentas quimiométricas
• Beneficiário: Paula de Freitas Rosa Remiro
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 08/08260-3 - Análises químicas de amostras ambientais da Antártica: determinação espectrométrica de Cd, Cr, Ni e Pb, uso de micro-fluorescência de Raios-X com radiação síncrotron e aplicações de ferramentas quimiométricas
• Beneficiário: Marcelo Braga Bueno Guerra
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto