@Article{jrm.2023.025271,
AUTHOR = {Bo Shi, Dandan Zhu, Pengxiang Lei, Ximin Li, Hengbo Xiao, Lihua Qian},
TITLE = {Ammonium Metavanadate Fabricated by Selective Precipitation of Impurity Chemicals on Inorganic Flocculants},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {11},
YEAR = {2023},
NUMBER = {4},
PAGES = {1951--1961},
URL = {http://www.techscience.com/jrm/v11n4/50681},
ISSN = {2164-6341},
ABSTRACT = {High purity ammonium metavanadate (NH<sub>4</sub>VO<sub>3</sub>) is the most vital chemical to produce V<sub>2</sub>O<sub>5</sub>, VO<sub>2</sub>, VN alloy, VFe alloy and VOSO<sub>4</sub>, which have some prospective applications for high strength steel, smart window, infrared detector and imaging, large scale energy storage system. NH<sub>4</sub>VO<sub>3</sub> 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 NH<sub>4</sub>VO<sub>3</sub> 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. NH<sub>4</sub>VO<sub>3</sub> 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 NH<sub>4</sub>VO<sub>3</sub> with high added value, but also reduce the environmental pollution of waste liquid.},
DOI = {10.32604/jrm.2023.025271}
}