Effect of ultrasound on the dissolution kinetics of phosphate rock in HNO3.
Ultrasound is known to enhance solid/liquid reactions. This paper deals with the investigation of the dissolution of phosphate rock in nitric acid, in the absence and presence of ultrasound. The reaction is first-order with respect to H+ and activation energy equal to 16 kJ/mol in both cases. The effect of ultrasound is on the pre-exponential factor A. An empirical relation is given, which relates rate constant to ultrasound power.
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Faculty of Engineering, Department of Chemical Engineering, Atatürk University, 25240 Erzurum, Turkey. tanertekin@rocketmail.com
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Bayramoğlu
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