EFFECT OF ELECTROLYTE-COMPOSITION ON ZINC HYDROXIDE PRECIPITATION BY LIME

Authors
BALTPURVINS KA BURNS RC LAWRANCE GA STUART AD
Citation
Ka. Baltpurvins et al., EFFECT OF ELECTROLYTE-COMPOSITION ON ZINC HYDROXIDE PRECIPITATION BY LIME, Water research, 31(5), 1997, pp. 973-980
Citations number
15
Categorie Soggetti
Engineering, Civil","Environmental Sciences","Water Resources
Journal title
Water research → ACNP
ISSN journal
00431354
Volume
31
Issue
5
Year of publication
1997
Pages
973 - 980
Database
ISI
SICI code
0043-1354(1997)31:5<973:EOEOZH>2.0.ZU;2-X
Abstract
The effect of effluent composition on the efficiency of the hydroxide precipitation of Zn2+ modelling lime (CaO) as a precipitant has been p redicted using the solubility domain approach and experimentally valid ated. Solubility domains were based on the phases that were found to b e solubility limiting for systems representing potential effluent chem ical composition limits. All such phases were found to resemble their mineralized counterparts with a lower degree of structural order. The generated solubility domains generally encompassed the experimentally observed solubilities, thus providing effluent treatment quality assur ance ranges for the hydroxide precipitation process. The presence of c alcite (CaCO3) and gypsum (CaSO4.2H(2)O) as secondary precipitates had little effect on the observed residual zinc solubilities. Validation of the solubility domain approach using real industrial wastewater was accomplished. (C) 1997 Elsevier Science Ltd.