Why does the effluent turn yellow when alkali is added for adjustment after the later stage of the Fenton reaction?

2017-10-22View Original

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Why does the effluent turn yellow when alkali is added during the later stage of the Fenton reaction to adjust the pH? If no alkali is added or only a small amount is used, the effluent becomes clear. What’s going on? Please explain this, experts.

Reply #22017-10-22

There may be iron ions, and upon adding alkali, Fe(OH)3 precipitate is formed

Reply #32017-10-22

Add some sodium hydroxide to see if the iron ions have precipitated completely

Reply #42017-10-23

Is the catalyst ferrous sulfate? It should be iron ions

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Why does the effluent turn yellow when alkali is added for adjustment after the later stage of the Fenton reaction?

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