Open Access

ARTICLE

Ammonium Metavanadate Fabricated by Selective Precipitation of Impurity Chemicals on Inorganic Flocculants

by Bo Shi¹, Dandan Zhu^2,*, Pengxiang Lei³, Ximin Li⁴, Hengbo Xiao⁴, Lihua Qian^4,*

1 Shandong Aluminum Industry Corporation Limited, Zibo, China
2 Petroleam & Natural Gas Transport Corporation of China, Wuhan, China
3 School of Chemistry and Chemical Engineering, Hubei University of Technology, Wuhan, China
4 School of Physics, Huazhong University of Science and Technology, Wuhan, China

* Corresponding Authors: Dandan Zhu. Email: ; Lihua Qian. Email:

Journal of Renewable Materials 2023, 11(4), 1951-1961. https://doi.org/10.32604/jrm.2023.025271

Received 02 July 2022; Accepted 04 August 2022; Issue published 01 December 2022

Abstract

High purity ammonium metavanadate (NH₄VO₃) is the most vital chemical to produce V₂O₅, VO₂, VN alloy, VFe alloy and VOSO₄, which have some prospective applications for high strength steel, smart window, infrared detector and imaging, large scale energy storage system. NH₄VO₃ is usually produced by spontaneous crystallization from the aqueous solution due to its sharp dependence of solubility on the temperature. However, hazardous chemicals in industrial effluent, include phosphorate, silicate and arsenate, causing severe damage to the environment. In this work, these impurities are selectively precipitated onto inorganic flocculants, while the vanadate dissolved in an aqueous solution keeps almost undisturbed. Therefore, high purity NH₄VO₃ is produced by the crystallization from the purified solution. By screening various flocculants and precipitating parameters, polyaluminum sulfate with an optimal amount of 50 g/L, is demonstrated to selectively remove phosphorate, silicate and arsenate, corresponding to the removing efficiency of 93.39%, 97.11% and 88.31%, respectively. NH₄VO₃ from the purified solution holds a purity of 99.21%, in comparison with 98.33% in the product from the crude solution. This purifying technology cannot only produce NH₄VO₃ with high added value, but also reduce the environmental pollution of waste liquid.

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