The leachate from the bayer process for alumina is yellow-green in color
Thread Content
I have recently started working on experiments related to the production of alumina; after leaching using the Bayer process and followed by filtration, the solution turned yellow-green. Could someone explain why this happens? Are they iron ions?
Yellow may be due to iron ion impurities, but green is not the color of iron ions. It is recommended to analyze the filtrate for transition metal elements, with iron being a likely candidate. One can try adding alkali to the filtrate; once a noticeable precipitate forms, stir thoroughly, then acidify with sulfuric acid and observe the color change. If the green color disappears, it indicates that the main impurity is iron. If green remains, it confirms the presence of other impurity ions.
Professional + classic; there’s a expert upstairs