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| Souza,Marcelle S. P. A. de; Santos,Fabiana S. dos; Magalhães,Luis M. S.; Freitas,Welington K. de; Gois,Givanildo de; Oliveira Júnior,José F. de. |
| ABSTRACT The present study aimed to determine heavy metal concentrations in the tree bark of the species Poincianella pluviosa in Volta Redonda municipality, Rio de Janeiro. Four sets of barks of eight trees with three replicates each from sectors 1 (W), 2 (S), 3 (E), and 4 (N) of the Volta Redonda center corresponding to the cardinal points were collected. The samples were digested in a nitroperchloric mixture and the lead (Pb), cadmium (Cd), nickel (Ni), copper (Cu), zinc (Zn), iron (Fe), and manganese (Mn) contents were determined by atomic absorption spectrophotometry. The cluster analysis (CA) formed 12 groups; among them, group 3 (G3) showed the presence of all seven elements in sector 1 and group 8 (G8) showed the presence of Pb, Zn, Fe, Ni, and Mn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atmospheric pollution; Urban ecology; Sibipiruna. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000100071 |
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| Mazzoni,Aline Correa; Lanzer,Rosane; Bordin,Juçara; Schäfer,Alois; Wasum,Ronaldo. |
| Caxias do Sul hosts the second largest metal-mechanic pole in Brazil, which increases the risk of atmospheric contamination. With the aim of identifying species that might be useful as indicators of atmospheric deposition of metals, 15 species of mosses from an urban and a rural setting were analyzed and compared with specimens deposited at the Herbarium of the Universidade de Caxias do Sul. Metal concentrations (Zn, Ni, Cd, Cr, Cu and Pb) were determined using Atomic Absorption Spectrometry (AAS). The Mann-Whitney test indicated concentrations of Zn, Cu, Pb and Cr that were significantly different between the urban and rural areas. Additionally, Concentrations of Zn, Cd, Cu and Pb were significantly higher in recently collected samples. The species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atmospheric pollution; Bioindicators; Bryophyta; Heavy metals; Rio Grande do Sul. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000300005 |
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| MARQUES JUNIOR,AGUINALDO N.; PANETTO,DOUGLAS P.; LAMEGO,FERNANDO; NEPOMUCENO,FELIPE O.; MONNA,FABRICE; LOSNO,REMI; GUILLON,RODRIGUE. |
| Abstract The atmospheric dispersion atmospheric plume of the metropolitan region and neighborhoods of the city of Rio de Janeiro was investigated through elemental analyzes (Na, K, Al, Mn, Pb, Ni, Cr) and stable lead isotopes in two epiphytes; the lichen Parmotrema crinitum (Ach.) and the bromeliad Tillandsia usneoides (L.). All the elements had lower concentrations in epiphytes than in rocks of the local geological basement, with the exception of K, which was similar to rocks. This behavior was attributed to the nutritional essentiality and abundance of this element in the environment. The concentrations of Na, Pb and the 206Pb/207Pb and 208Pb/206Pb ratios indicated the presence of spatial gradients in the path (a) sea shore → continent, and (b) urban... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stable lead isotopes; Atmospheric pollution; Parmotrema crinitum (Ach.); Tillandsia usneoides (L.). |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602991 |
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