Sulfate removal by ettringite precipitation

Authors
Pehlivanoglu, E Kabdasli, I Tunay, O
Citation
E. Pehlivanoglu et al., Sulfate removal by ettringite precipitation, FR ENV BULL, 7(12A), 1998, pp. 826-832
Citations number
5
Categorie Soggetti
Environment/Ecology
Journal title
FRESENIUS ENVIRONMENTAL BULLETIN
ISSN journal
10184619 → ACNP
Volume
7
Issue
12A
Year of publication
1998
Pages
826 - 832
Database
ISI
SICI code
1018-4619(199811/12)7:12A<826:SRBEP>2.0.ZU;2-E
Abstract
In this study, the principles of chemical precipitation of sulfate which is based on the formation of ettringite, a double salt with the formula Ca3Al 2O6.3CaSO(4).32H(2)O are evaluated. The Al-2(SO4)(3)-Ca(OH)(2)-H2O system i s chosen to study the equilibrium equations for ettringite precipitation. T he residual sulfate concentrations are below 200 mg/l in pH values above 10 ,5 indicating that ettringite precipitation can be employed as an alternati ve treatment process for the removal of sulfate ions.