Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag
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Radmilović, Vuk V.
Janković Častvan, Ivona
Radmilović, Velimir R.
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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+.
Keywords:adsorption / alkali activation / copper / FTIR / porous materials / steel slag
Source:Materials Letters, 2019, 235, 184-188
- Ministry of Science of Montenegro, Project no. 01-2383/2
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-45019)
- Development, characterization and application nanostructured and composite electrocatalysts and interactive supports for fuel cells and water electrolysis (RS-172054)
- Serbian Academy of Sciences and Arts, Project F-141