Modeling controlled potassium release from phlogopite in solution: exploring the viability of using crushed phlogopitite rock as an alternative potassium source in Brazilian soil

Journal of the Brazilian Chemical Society

Ronconi, Célia M.¹  França, Sílvia C. A.¹  Sampaio, João A.¹  Silva, Adriana de A. S. da¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil¹  Luz, Adão B. da¹  Centro de Tecnologia Mineral, Rio de Janeiro, Brazil¹ 

关键词: phlogopitite;    phlogopite;    potassium source;    potassium release;    kinetic studies;   

DOI  :  10.5935/0103-5053.20130173

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The chemical and mineralogical properties of phlogopitite, a rock containing the mineral phlogopite, were studied aiming at employment as an alternative source of potassium. Mineralogical characterization of this rock was performed using X-ray diffractometry, X-ray fluorescence, scanning electron microscopy and infrared spectroscopy. According to the results, phlogopite contains approximately 82.6 g K2O kg-1 (ca. 9%). The kinetics involved in the release of the potassium ions from the mineral were examined using acidic solutions (nitric, citric, oxalic and Mehlich-1) and a salt solution (sodium tetraphenylboron, Na[B(C6H5)4]). The experimental results from the kinetic studies were used to determine the mathematical relationship between the concentration of potassium released and the reaction time.

【 授权许可】

Unknown