Abstract
Industrial byproduct, steel slag was used as a low-cost sorbent for the removal of Co(II), Ni(II), Cd(II), and Pb(II) from aqueous solutions containing chelating agents; EDTA, citrate, and oxalate. Equilibrium and kinetic studies were conducted. Clear dependency between speciation of metals and their sorption behavior was observed. Precipitation and adsorption were suggested as main mechanisms. Diffusion played an important role in the kinetics of metal removal. Notable leaching of elements was observed when steel slag was in contact with the solutions under study. Modification with chitosan was successfully used to prevent leaching and improve the sorption capacity of steel slag.
Original language | English |
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Pages (from-to) | 115-125 |
Number of pages | 11 |
Journal | Journal of Industrial and Engineering Chemistry |
Volume | 27 |
DOIs | |
Publication status | Published - 25 Jul 2015 |
Externally published | Yes |
Keywords
- Adsorption
- Byproduct slag
- EDTA
- Low-cost sorbent
- Metal chelates
- Water treatment
ASJC Scopus subject areas
- General Chemical Engineering