Potassium Release Kinetics from Dioctahedral and Trioctahedral Minerals under Alkaline Conditions

Authors

  • Umair Riaz

Keywords:

mica, potassium, biotite, muscovite, alkaline pH, dissolution

Abstract

The agricultural significance of Potassium K has been comprehensively documented owing to its role in plant development and growth The reserves of K in soil are not available to plant roots for uptake as 98 of the total soil K is mineral bound The K bearing 2 1 type clay minerals can serve as an enormous and renewable pool of K supply in soil The K releasing capacity of these minerals is governed by different agents like ionic strength temperature and pH Therefore the release K from dioctahedral Muscovite and trioctahedral Biotite pure minerals were investigated at 25 1 C in batch reactors over the pH range of 8 to 12 The experiments performed until the steady state was achieved At the start of each experiment the high output solutions concentrations of Fe Si K and Al were recorded after that a gradual reduction was observed leading to the establishment of steady state conditions The release of Kwas more from the dissolution of biotite thanmuscovite dissolution The both rates ranged at steady state between -10 13 mol g-1s-1 and -8 84 mol g-1s-1 at pH 8-12 respectively The dissolution rates of muscovite RSi ranged between -9 64 mol g-1s-1 and -8 44 mol g-1s-1 at pH range 8 to 12 respectively It is concluded that the solution pH has an affect significantly to the K release from biotite and muscovite dissolution These results suggest that biotite-rich soils may have a relatively rapid leaching of K under alkaline conditions and have less K-fertilizer requirements as compared to muscovite dominant soils

How to Cite

Umair Riaz. (2018). Potassium Release Kinetics from Dioctahedral and Trioctahedral Minerals under Alkaline Conditions. Global Journal of Science Frontier Research, 18(D2), 61–71. Retrieved from https://journalofscience.org/index.php/GJSFR/article/view/2222

Potassium Release Kinetics from Dioctahedral and Trioctahedral Minerals under Alkaline Conditions

Published

2018-01-15