Alkali-activated adsorbents from slags : column adsorption and regeneration study for nickel(II) removal |
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Author: | Sundhararasu, Elavarasi1; Tuomikoski, Sari1; Runtti, Hanna1; |
Organizations: |
1Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 4300, 90570 Oulu, Finland 2Unit of Applied Chemistry, Kokkola University Consortium Chydenius, University of Jyvaskylä, Talonpojankatu 2B, FI-67100 Kokkola, Finland |
Format: | article |
Version: | published version |
Access: | open |
Online Access: | PDF Full Text (PDF, 2.5 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe202103086760 |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute,
2021
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Publish Date: | 2021-03-08 |
Description: |
AbstractAlkali-activated adsorbents were synthesized by mixing three different slags from the steel industry: blast furnace slag (BFS), ladle slag (LS), and Lintz–Donawitz converter slag (LD). These powdered slag-based geopolymers (GP) were used to remove nickel(II) from aqueous solutions in fixed-bed column studies. The experiments were conducted in pH 6 using a phosphate buffer with initial nickel(II) concentration of 50 mg/L. Samples were taken at time intervals of between 5 and 90 min. Three adsorption–desorption cycles were implemented with a flow rate of 5 mL/min. The geopolymers were characterized by Fourier-Transform Infrared Spectroscopy (FTIR), X-ray powder diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), X-ray fluorescence (XRF), specific surface area measurements, and a leaching test. The data were found to describe the Thomas, Adams–Bohart, and Yoon–Nelson models well. For GP (BFS, LS), experimental adsorption capacity was 2.92 mg/g, and for GP (LD, BFS, LS), it was 1.34 mg/g. The results indicated that the produced adsorbents have the potential to be used as adsorbents for the removal of nickel(II). see all
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Series: |
ChemEngineering |
ISSN: | 2305-7084 |
ISSN-E: | 2305-7084 |
ISSN-L: | 2305-7084 |
Volume: | 5 |
Issue: | 1 |
Article number: | 13 |
DOI: | 10.3390/chemengineering5010013 |
OADOI: | https://oadoi.org/10.3390/chemengineering5010013 |
Type of Publication: |
A1 Journal article – refereed |
Field of Science: |
116 Chemical sciences |
Subjects: | |
Funding: |
This research was funded by Maa-ja Vesitekniikan tuki ry. This work was conducted under the auspices of the Waterpro (ERDF project number: A74635, funded by the European Union, European Regional Development Fund and Leverage from the EU and Regional Councils). |
Copyright information: |
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
https://creativecommons.org/licenses/by/4.0/ |