The role and use of ferrous sulfate

Ferrous sulfate is an inorganic substance, alias green alum, light green crystals, and its crystalline hydrate is heptahydrate (i.e.: ferrous sulfate heptahydrate) at room temperature, ferrous sulfate is soluble in water, slightly soluble in alcohol, insoluble in ethanol. So, what are the uses of ferrous sulfate?

First, the use of ferrous sulfate:

1, ferrous sulfate is used for water flocculation and purification, as well as the removal of phosphate from urban and industrial sewage to prevent eutrophication of water bodies.

a. As a strong reducing agent, it can reduce the hexavalent chromium of chromium wastewater from electroplating plant to trivalent chromium, and it can also replace many heavy metal ions in wastewater.

b. As a flocculant with fast settling speed, large sludge particles, small and dense sludge volume, etc., especially for the sewage of printing and dyeing and textile industry, it has a very good decolorizing effect.

c. It can generate water-insoluble precipitates with sulfide and phosphate, and then remove sulfide and phosphate.

2、Used for coloring agent

a.Ferrous sulfate is needed for the production of iron tannate ink and other inks.

b.The mordant for wood dyeing also contains ferrous sulfate.

c. Ferrous sulfate can be used to stain concrete to yellow rust color.

d. Woodworkers use ferrous sulfate to make maple wood stained with silver color.

3. It is used as a reducing agent in indigo dyeing in printing and dyeing industry. The indigo dye is printed on the fabric in the form of insoluble substance and then reduced to indigo white by ferrous sulfate.

4、It is the raw material for the manufacture of magnetic iron oxide, iron oxide red and iron blue inorganic pigment, iron catalyst and iron polysulfate.

5、Used as a reducing agent, mainly reduce the chromate in cement.

6、Agricultural ferrous sulfate can be used as fertilizer, pesticide and herbicide, such as the use of ferrous sulfate in horticulture can kill moss.

7、Feed grade ferrous sulfate is used as iron supplement in feed processing.

8, ferrous sulfate and brass turbine condenser contact, it will generate corrosion-resistant protective layer on the surface of its inner tube.

9、It is also used as wood preservative, photographic developer, chromatographic analysis reagent and so on.