Characterization of potassium agrominerals: Correlations between petrographic features, comminution and leaching of ultrapotassic syenites
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Allanore_Characterization of potassium.pdf
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Checksum (MD5)
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Author(s)
Ciceri, Davide
de Oliveira, Marcelo Augusto
Stokes, Rebecca M.
Skorina, Taisiya
Allanore, Antoine
Date Issued
December 2016
Journal
Minerals Engineering
Publisher
Elsevier
Citation
Ciceri, Davide et al. “Characterization of Potassium Agrominerals: Correlations Between Petrographic Features, Comminution and Leaching of Ultrapotassic Syenites.” Minerals Engineering 102 (March 2017): 42–57 © 2016 Elsevier Ltd
Version
Author's final manuscript
Abstract
Growth of world population and consequent growth of food demand are drivers of expansion and intensification of agriculture. High-yield agriculture relies on fertilizers that, therefore, become a key focus to address concerns on global food security. Currently, potassium fertilizers are produced in the northern hemisphere. These fertilizers do not suit the deep leached soils of tropical countries, partly due to their high solubility. The use of geological materials (agrominerals) such as K-bearing silicates could be an option to develop slow release potassium fertilizers from abundant and readily available geologic sources. Thus far, both laboratory and agronomic field tests on such materials have been inconclusive, meaning that a clear relationship between the application of agrominerals to soil and the fertilizing effect could not be established. Novel interdisciplinary approaches are needed to predict the release of nutrients from agrominerals. This study presents one such approach, proposing a detailed analysis of the relationship between petrographic characteristics of twelve samples of ultrapotassic syenite (K-feldspar ore), and the leaching of potassium from their powders. The correlation between petrographic features, comminution and leaching proposed here, is expected to play a major role in the assessment of the fertilizing properties of agrominerals in the field. Keywords: Agrominerals; Comminution; Fertilizers; K-feldspar; Leaching; Potash
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.mineng.2016.11.016
