How to remove chromium trioxide from water
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I recently took on a project involving wastewater that contained chromium trioxide, which is trivalent chromium. After adding sodium hydroxide, a precipitate was formed, but the water remained light green in color. I checked some relevant information, and chromium trioxide water is exactly this color. Has anyone tried something similar with wastewater? Some say to use hydrogen peroxide and calcium oxide, while others suggest using calcium carbonate… but the color remains light green, and activated carbon doesn’t help either in removing it.
Chromium trioxide is a solid, right? PAC can be used to assist in precipitation. For the green liquid, you can use atomic absorption to test for any heavy metals present.