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We herein report the development of a membrane-assisted electrochemical method for separating sodium and vanadium from a sodium orthovanadate solution. During the employed electrolysis process, Na+ ions in the anode chamber pass through the cation-exchange membrane and combine with OH− ions in the cathode chamber to produce a concentrated NaOH solution, resulting in lowering of the pH in the anode...
Roasting–leaching–precipitation-calcinations is the conventional way for manufacturing vanadium oxide. Due to the mixing of sodium and ammonium salts in the ammonium precipitation process, a large amount of high concentration ammonia-nitrogen wastewater is produced. In this work, a novel preparation method of low-valent vanadium oxide has been proposed. Using the intermediate product of sodium metavanadate...
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