Water Treatment Chemicals Ferrous Sulphate

1. traits

Ferrous sulfate, also known as green vitriol, is blue-green, light green or light yellow crystals or particles, odorless and tasteless. Its chemical formula is FeSO?·7H2O, its relative molecular mass is 278.02, its relative density is 1.898, its melting point is 64°C and 90°C, and it loses 6 crystal waters, and loses all crystal water at 300°C. Soluble in water and glycerin, slightly soluble in alcohol, easily oxidized into yellow or rust color in humid air.

2. Mechanism of action

Ferrous sulfate can be dissociated into Fe3+ and SO2- in aqueous solution. Fe2+ hydrolyzes or reacts with alkali in water to form Fe(OH)?. The flocculation effect of ferrous iron is not as good as ferric iron, so when using ferrous sulfate, it is necessary to oxidize ferrous iron into ferric iron by oxidation, aeration and other methods.

3. Purpose

The product is used as a flocculant in drinking water and industrial water treatment.

4. How to use

When in use, it is generally prepared into a 5% to 20% solution in the dissolution pool before adding ferrous sulfate. The optimum flocculation pH range is above 9.0, so it is best to use it in combination with alkalization agents or organic polymer flocculants.

5. Precautions

Ferrous sulfate is highly corrosive, and the dosing equipment needs to be treated with anti-corrosion treatment, and the operators should be equipped with labor protection facilities. Ferrous sulfate should be stored in a cool, dry and ventilated warehouse. It should not be stacked in the open air. It should be protected from rain, collision and pollution by toxic substances.