Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/30015
Título: Extractant efficiency in the solubilization of alternative sources of potassium
Título(s) alternativo(s): Eficiência de extratores na solubilização de fontes alternativas de potássio
Palavras-chave: Minerals
Soluble K
Fertilizer
Powdered rock
Mineral
K solúvel
Fertilizante
Pó de rocha
Data do documento: 2016
Editor: Editora da Universidade Estadual de Maringá - EDUEM
Citação: REIS, D. N. dos et al. Extractant efficiency in the solubilization of alternative sources of potassium. Acta Scientiarum. Agronomy, Maringá, v. 38, n. 3, p. 397-406, July/Sept. 2016.
Resumo: Knowledge of a rock's composition allows for inferences regarding several properties, ranging from its physical characteristics to its solubility. This study aimed to evaluate the use of different extractants to solubilize the K present in rocks as a potential source of nutrients and the effects of extractant contact time and temperature on rock solubilization. Samples of two rocks and a mineral concentrated from a granitic rock were treated with ammonium dihydrogen phosphate (NH4(H2PO4)), calcium dihydrogen phosphate (Ca(H2PO4)2), sodium hydroxide (NaOH) and water (control). Sample-extractant treatments were performed using a water bath shaker at temperatures of 25 and 50°C for periods of 3, 7, 10, 20, and 30 days. The amounts of K extracted from rocks using the extractants were in the following order: NH4H2PO4>Ca(HPO4)2>NaOH>water. The sequence of K release (ppm) based on the rocks studied was as follows: nepheline syenite>green banded argillite>concentrated biotite. Increasing the extractant contact time and temperature enhanced the solubilized K content.
URI: http://repositorio.ufla.br/jspui/handle/1/30015
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