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| Valladares,Gustavo Souza; Santos,Gláucia Cecília Gabrielli dos; Abreu,Cleide Aparecida de; Camargo,Otávio Antônio de; Ferrero,Jorge Paz. |
| Em amostras dos horizontes A e B de vinte e oito perfis de unidades de solos representativas do Estado de São Paulo fez-se a determinação de zinco usando os extratores DTPA pH 7,3 (ZnDTPA); Mehlich-1 (ZnM1); HCl 0,1 mol L-1 (ZnHCl); EDTA (ZnEDTA); e, NH4OAc 1 mol L-1 (ZnAc). O teor total de zinco nas amostras de solo estava alto, entretanto, notou-se somente uma pequena fração na forma disponível. O zinco total foi mais influenciado pelo teor de óxido de ferro (r=0,75). Para os teores considerados biodisponíveis, o pH foi o componente mais importante com coeficientes de correlação que variaram de 0,52 (ZnDTPA) a 0,66 (ZnAc). A análise dos componentes principais (PCA) revelou que os dois primeiros componentes principais explicaram 66% da variação, mostrando... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Análise de solo; Micronutriente; Extratores químicos; Análise multivariada; Componente principal. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052009000400031 |
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| Santos,Gláucia Cecília Gabrielli dos; Berton,Ronaldo Severiano; Camargo,Otávio Antônio de; Abreu,Mônica Ferreira de. |
| The costs related to the construction and maintenance of industrial landfills, and the environmental risks that they may represent, have increased the interest of several types of industries in studying the possibility of applying residues to agricultural soils. This study evaluates the efficiency of flue dust as a zinc source for corn, and the zinc availability for corn evaluated by four methods. A greenhouse experiment carried out at Campinas, SP, Brazil, evaluated the effect of two zinc sources (flue dust and zinc sulphate), at three rates (5, 50 and 150 mg dm-3), in one soil (Rhodic Hapludox) under two pH conditions (5.0 and 6.0). The treatments were arranged in a randomized factorial scheme design with three replications. Zinc availability indexes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DTPA; Heavy metals; Industrial wastes; Speciation; Soil pH. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600008 |
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| Santos,Gláucia Cecília Gabrielli dos; Rodella,Arnaldo Antonio; Abreu,Cleide Aparecida de; Coscione,Aline Renée. |
| Phytoremediation is an attractive option to remove metal from contaminated soil since it is a simple, low-cost, and environmentally friendly procedure. To better examine the phytoremediation potential of kenaf (Hybiscus canabinnus), mustard (Brassica juncea), turnip (Raphunus sativus) and amaranth (Amaranthus crentus) plants, a greenhouse experiment was performed in which these species were grown on a soil contaminated with Zn, Cu, Mn, Pb and B. The translocation, the bioconcentration and the removal index, the transference factor and the time to reach 50% of element removal from soil, among other indicators, were used in order to identify a hyperaccumulator. Kenaf plants were more tolerant to the conditions tested, with the highest dry matter production... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytorremediation; Tropical soil; Heavy metal. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600014 |
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