Concentrated sulfuric acid is green in color
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Recently, in my factory (lead smelting), the dried product, the first absorption stage product, the second absorption stage product, and the final acid all have a light green color. The management says this is caused by a high selenium content, but I don’t think so. I would like to ask the experts for their opinions.
Sulfuric acid must have reacted with the container holding it
I personally think it’s ferrous ions, but I’m not sure at what concentration sulfuric acid turns green.
It has also happened in our factory; it seems to be related to the flotation agents used in mining, and things got better after changing those agents.