<b>Extractant efficiency in the solubilization of alternative sources of potassium

  • Daniele Nogueira dos Reis Universidade Federal de Lavras
  • Peter van Straaten University of Guelph
  • Antonio Eduardo Furtini Neto Universidade Federal de Lavras
  • Sheila Maria Bretas Bittar Universidade Federal Rural de Pernambuco
  • Nilton Curi Universidade Federal de Lavras

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.

 

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Publicado
2016-06-24
Como Citar
Reis, D. N. dos, van Straaten, P., Furtini Neto, A. E., Bittar, S. M. B., & Curi, N. (2016). <b&gt;Extractant efficiency in the solubilization of alternative sources of potassium. Acta Scientiarum. Agronomy, 38(3), 397-406. https://doi.org/10.4025/actasciagron.v38i3.28457
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Solos

 

2.0
2019CiteScore
 
 
60th percentile
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2.0
2019CiteScore
 
 
60th percentile
Powered by  Scopus