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Growth and dissolution kinetics of potassium sulfate in pure solutions and in the presence of Cr3+ ions

✍ Scribed by M. Gougazeh; W. Omar; J. Ulrich

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
140 KB
Volume
44
Category
Article
ISSN
0232-1300

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✦ Synopsis

Abstract

The growth and dissolution kinetics of potassium sulfate was studied based on single crystal measurements. The growth rate is correlated to the supersaturation with power low equation. At all the temperatures studied, the growth rate order lies in the range of 1‐1.5 with the surface integration process as the controlling step. The estimated value of the activation energy of growth is 39.4 kJ/mol. The dissolution rate order decreases with increasing the temperature. The diffusion step is controlling the dissolution process. The addition of 5 ppm Cr^3+^ ions reduces the growth rate. Both growth rate dispersion and dissolution rate dispersion occur in the growth and dissolution processes of potassium sulfate. (Β© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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