LAPSE:2019.0980
Published Article
LAPSE:2019.0980
Kinetics of Arsenic Removal in Waste Acid by the Combination of CuSO4 and Zero-Valent Iron
September 5, 2019
In this study, we investigated the kinetics of arsenic removal from waste acid by the combination of zero-valent iron (ZVI) and CuSO4. ZVI samples were characterized by X-ray diffraction and scanning electron microscopy before and after arsenic removal; the results showed that after the arsenic removal reaction, As2O3 and magnetite phases were detected on the surface of these samples. Kinetic studies were carried out under different reaction temperatures, with different CuSO4 concentrations, and with different iron to arsenic molar ratios (Fe/As). The kinetic data of the arsenic removal were fitted to different kinetic models. The fitting results showed that the arsenic removal process could be described by the shrinking core model, controlled by residual layer diffusion. The apparent activation energy of the reaction was 9.0628 kJ/mol, the reaction order with the CuSO4 concentrations was −0.12681, and the reaction order with the molar ratio of iron to arsenic (Fe/As) was 3.152.
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Keywords
arsenic, kinetic, waste acid, zero-valent iron
Subject
Suggested Citation
Xi Y, Luo Y, Zou J, Li J, Liao T, Zhang L, Wang C, Li X, Lin G. Kinetics of Arsenic Removal in Waste Acid by the Combination of CuSO4 and Zero-Valent Iron. (2019). LAPSE:2019.0980
Author Affiliations
Xi Y: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Luo Y: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Zou J: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Li J: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o [ORCID]
Liao T: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Zhang L: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Wang C: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Li X: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Lin G: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
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Luo Y: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Zou J: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Li J: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o [ORCID]
Liao T: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Zhang L: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Wang C: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Li X: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
Lin G: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory o
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Journal Name
Processes
Volume
7
Issue
7
Article Number
E401
Year
2019
Publication Date
2019-06-28
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7070401, Publication Type: Journal Article
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LAPSE:2019.0980
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doi:10.3390/pr7070401
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[v1] (Original Submission)
Sep 5, 2019
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Original Submitter
Calvin Tsay
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