Ferrous chloride is added to the effluent from domestic wastewater; the pH level is too high
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Ferrous chloride is added to the effluent from domestic wastewater treatment; when the pH level is too high, proper mixing does not occur, and the online monitoring of the pH value of this effluent shows only 3–4. I would like to know what is the mechanism behind this? How to solve it? The pH is only 3-4; logically, the amount of chemical added should be very small, around 10-30 ppm at most. It’s unlikely that this would result in such a low pH level in the effluent. Could it be a measurement error? I have another question due to some other reasons: Is 20% concentration ferric chloride highly corrosive? On my chemical addition tube, a section with iron connectors has completely broken down; it only lasted for one day
Iron trichloride is acidic, as you proved through experiments
Iron trichloride is highly corrosive and acidic; it reacts violently with water, generating a large amount of heat.