Cr(VI) Removal from Water with Amorphous Graphite Concentrate Contaminated by Iron |
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| Authors: | Lang Yang Qiang Yang Shaoxian Song |
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| Affiliation: | 1. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei, China;2. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, Hubei, China;3. Hubei Provincial Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, Wuhan University of Technology, Wuhan, Hubei, China |
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| Abstract: | This work attempted to explore the feasibility of using iron-contaminated graphite concentrate as an effective adsorbent for Cr(VI) removal from polluted water. Adsorption isotherm and kinetics were conducted to investigate the Cr(VI) removal capacity by the iron-contaminated amorphous graphite concentrates. In addition, SEM-EDS, XPS were carried out to further examine the solid samples. The results showed that amorphous graphite concentrate had a 1.52 mg/g adsorption capacity of Cr(VI), with the adsorption being fitted well with the pseudo-second-order kinetics model. In addition, chemical adsorption of Cr(V) on iron-contaminated graphite concentrate due to the formation of ≡Fe-O4HCr and Fe2-(CrO4)3 complexes was proposed. This study revealed that iron-contaminated amorphous graphite concentrate would be a cheap and good adsorbent for the removal of Cr(VI) from contaminated water. |
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| Keywords: | Adsorbent chemical adsorption Cr(VI) removal iron-contaminated graphite |
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