Enhanced sorption of Cu^sup 2+^ from sulfate solutions onto modified electric arc furnace slag

Pristine electric arc furnace slag (EAFS) as well as EAFS modified by alkali activation i.e. alkali activated slag (AAS) have found a novel application as adsorbents used in Cu2+ removal from sulfate solutions. The adsorption tests were carried in batch conditions and results have shown that alkali...

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Bibliographic Details
Published in:	Materials letters Vol. 235; p. 184
Main Authors:	Nikolić, Irena, Marković, Smilja, Veselinović, Ljiljana, Radmilović, Vuk V, Janković-Častvan, Ivona, Radmilović, Velimir R
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier BV 15-01-2019
Subjects:	Activation Adsorption Alkalies Copper Electric arc furnaces Materials science Porous materials Surface chemistry
Online Access:	Get full text
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Summary:	Pristine electric arc furnace slag (EAFS) as well as EAFS modified by alkali activation i.e. alkali activated slag (AAS) have found a novel application as adsorbents used in Cu2+ removal from sulfate solutions. The adsorption tests were carried in batch conditions and results have shown that alkali activation of EAFS enhances the Cu2+ adsorption. The adsorption process was found to follow a pseudo second-order kinetic model and occurs via formation of posnjakite (Cu4(SO4)(OH)6·H2O) on the surface of both, EAFS and AAS. Enhanced adsorption properties of AAS, compared to EAFS, are attributed to a more porous structure, larger specific surface area and an increased number of surface groups involved in the binding of Cu2+.
ISSN:	0167-577X 1873-4979