Calcium Sulfate Solubility in Organic‐Laden Wastewater
Publication: Journal of Environmental Engineering
Volume 111, Issue 3
Abstract
Calcium sulfate solubility product and ion pair dissociation constant were measured in clean water, and these results were employed in tests with a pretreated coal conversion process wastewater to assess the tendency for organic matter in the wastewater to function as a complexing agent for calcium. It was demonstrated that wastewater organic matter interacted with calcium to form a calcium‐organic complex. The extent of this interaction in wastewater was as significant as that for formation of the ion pair in assessing solubility of It was shown that the organic matter complexed with calcium to an extent comparable to humic acid, and that the complexing strength was similar to that predicted for citrate when compared on an equivalent COD or TOC basis. The results of this study are important for evaluating CaS04 scaleforming reactions if wastewater is to be reused as makeup water to an evaporative cooling tower.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 111 • Issue 3 • June 1985
Pages: 317 - 335
Copyright
Copyright © 1985 ASCE.
History
Published online: Jun 1, 1985
Published in print: Jun 1985
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