Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7704222 | Ultrasonics Sonochemistry | 2015 | 8 Pages |
Abstract
This paper reports on the application of ultrasound during the sulfate precipitation process. We show that with as little as 10Â s sonication at 24Â kHz, significant increases in the rate of sulfate precipitation are observed. Particle size analysis, pH profiles and SEM micrographs, suggest that the likely mode of action is disaggregation of the calcium hydroxide particles, giving a greater solid-liquid interface, thus resulting in a faster dissolution rate and more readily available calcium ions. A range of experimental variables are studied, including the duration and power of sonication, as well as initial sulfate concentration and the effect of changing the time at which sonication is applied. For both sonicated and non-sonicated samples, precipitation commences almost immediately that the lime is added and so induction time is not an issue in this system.
Related Topics
Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Lisa A. Davies, Andrew Dargue, John R. Dean, Michael E. Deary,