Behavior of Chr
Behavior
of Chromate ions in CaO-Al2 (SO4)3 Suspensio
Khulood A.A. AbuAlola
Chemistry Department,
Community College for Girls in Hyanakiyah, Taibah University, Al-Madinah
Al-Munawarah, K.S.A. Tel: 096605309610; [email protected]e-mail:
AbstractBehavior
of the chromate ions and their removal efficiency in CaO + Al2(SO4)
suspensions with molar ratio 4:1 was studied. The suspension prepared by
agitating the reactants with a magnetic stirrer for constant time intervals at
room temperature. Run products were collected by filtration, washing and
air-dry and evaluated by XRD, SEM and DTA. According to XRD and SEM results the
major product in this suspension was ettringite with minor amounts of gypsum
and calcite. DTA results showed that, the presence of the chromate ions in the
suspension retard the formation of the products and decrease the degree of
their crystallinity. However there is a high removal of the chromate ions by
the formed suspension products. This is related to the substitution of the
chromate ions by sulfate ions in the ettingite crystals. [khulood A.A.Abualola, Behavior
of Chromate ions in CaO-Al2 (SO4)3 Suspension, J
Am Sci 2013;9(3):28-33] (ISSN: 1545-1003) http://www.jofamericanscience.org. 5
Key words: CaO-Al2(SO4)3 suspensions,
Chromate ions, Removal. Full Text 5
6 [J Am Sci 2013;9(3):34-36]. (ISSN: 1545-1003). http://www.jofamericanscience.org. 6
Witdrawn Full Text 6
