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| Rodella,Arnaldo Antonio. |
| Analisou-se como o Estado de Washington, EUA, foi o primeiro Estado americano a ter legislação sobre contaminantes em fertilizantes minerais e corretivos. O objetivo foi considerar os eventos como uma possível referência para situação semelhante no Brasil. A divulgação do uso de resíduos industriais como fonte de micronutrientes pela imprensa determinou, de forma decisiva, o rumo dos acontecimentos. Diversas entidades foram envolvidas num processo subsidiado por informações técnicas relevantes, que culminou na promulgação de uma lei estadual num período de tempo bastante curto. No âmbito federal, contudo, a EPA (Environmental Protection Agency) regulamentou apenas o uso de resíduos industriais como fonte de Zn. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilizantes; Micronutrientes; Legislação; Metal pesado. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000500015 |
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| Prochnow,Luís Ignácio; Biasioli,Gustavo Marques; Rodella,Arnaldo Antonio; Jesus,Sérgio Luís de; Montes,Célia Regina; Alleoni,Luís Reynaldo Ferracciú. |
| The concentration of orthophosphate ions released from Fe-K-P compounds (Fe3KH8(PO4)6 .6H2O and Fe3KH14(PO4)8 .4H2O) present in superphosphates increases with pH, which initially suggests that the agronomic effectiveness of P fertilizers containing high amounts of these compounds would also increase with soil pH but studies considering activity, instead of concentration, are necessary. With this purpose, both compounds were synthesized under laboratory conditions, characterized by elemental chemical analysis, optical microscopy, X ray diffractometry, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), and used in a solubility study. Solutions of 0.01, 0.05 and 0.1 mol L-1 NaCl with pH adjusted to 3.0, 4.0, 5.0, 5.5, 6.0, 6.5, 7.0... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphate fertilizers; Cationic impurities; Phosphorus activity; Phosphorus bioavailability. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832006000300008 |
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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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