Reduction behaviors of pentavalent vanadium with biochar

Peng Hao; Wu Xibin; Zheng Xiongpan; Guo Jing; Huang Huisheng; Li Bing

doi:10.7513/j.issn.1004-7638.2021.04.003

Volume 42 Issue 4

Aug. 2021

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Peng Hao, Wu Xibin, Zheng Xiongpan, Guo Jing, Huang Huisheng, Li Bing. Reduction behaviors of pentavalent vanadium with biochar[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 12-17. doi: 10.7513/j.issn.1004-7638.2021.04.003

Citation:

Peng Hao, Wu Xibin, Zheng Xiongpan, Guo Jing, Huang Huisheng, Li Bing. Reduction behaviors of pentavalent vanadium with biochar[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 12-17. doi: 10.7513/j.issn.1004-7638.2021.04.003

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Reduction behaviors of pentavalent vanadium with biochar

doi: 10.7513/j.issn.1004-7638.2021.04.003

1.
College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
2.
Boda Environmental Sci-Tech Co., Ltd., Chongqing 401147, China

Received Date: 2021-06-08
Publish Date: 2021-08-10

Abstract

Abstract

As the toxicity of vanadium increases with increase of the valence and it causes increasing threaten to the environment, biochar was introduced to do harmless treatment for high-valence vanadium. The effects of dosage of biochar, reaction temperature, concentration of H₂SO₄ and reaction time on the reduction efficiency of vanadium were investigated. The results indicate that pentavalent vanadium is mainly in the form of VO₂⁺, H₃V₁₀O₂₈³⁻ and H₂VO₄⁻, and it can be reduced quickly with biochar in acidic medium. The reduction efficiency of vanadium up to 92.14% can be obtained at the following optimal conditions: initial vanadium concentration of 3 g/L, biochar dosage of 3 g, reaction temperature of 90 ℃, reaction time of 60 min, H₂SO₄ concentration of 20 g/L and stirring rate of 500 r/min. During the reduction process, no impurities are introduced. Thus the technology can be applied to harmless treatment of vanadium and also has a great potential for production of low-valence vanadium compounds.
- vanadium,
- biochar,
- reduction,
- thermodynamics

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References(14)

References

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