Metal sorption on blast-furnace slag

The removal of Cu, Ni and Zn-ions from water solution by ungranulated blast-furnace slag has been studied depending on contact time, initial ion concentration, pH and solution temperature. The polymineral composition and the slag specific properties determine its high sorption activity in metal salt...

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Bibliographic Details
Published in:Water research (Oxford) 1996, Vol.30 (1), p.228-232
Main Author: Dimitrova, S.V.
Format: Article
Language:English
Subjects:
blast-furnace slag
hydrooxocomplexes
metal ions
removal
sorption
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Summary:The removal of Cu, Ni and Zn-ions from water solution by ungranulated blast-furnace slag has been studied depending on contact time, initial ion concentration, pH and solution temperature. The polymineral composition and the slag specific properties determine its high sorption activity in metal salts solutions. In the range of the concentrations studied (10 −4–10 −3 M), the sorption data for Cu 2+, Ni 2+ and Zn 2+ have been described using Freundlich's parabolic equation. The material's own alkalizing activity creates conditions for effective metal ions sorption in a wide pH range. With the temperature increase the hydrolysis of the sorption matrix intensifies which leads to the sorption improvement. On the basis of both literature data and the author's own data the mechanism of metal ions removed by blast-furnace slag has been discussed.
ISSN:0043-1354
1879-2448
DOI:10.1016/0043-1354(95)00104-S