The main uses of ferrous sulfate heptahydrate include sewage treatment, industrial manufacturing, agricultural improvement, medicine, and food industries. Its versatility makes it an important chemical substance. Specifically, as follows:

sewage treatment

As a flocculant: By generating iron hydroxide colloids to adsorb suspended solids and colloidal particles, it improves precipitation efficiency and also has decolorization function.

Reduction and phosphorus removal: Hexavalent chromium can be reduced to low toxicity trivalent chromium and combined with phosphate ions to form a precipitate, effectively controlling eutrophication of water bodies.

Application scenarios: Widely used for municipal sewage, industrial wastewater (such as electroplating, printing and dyeing), and river treatment.

Industrial applications

Raw material manufacturing: used for producing iron salts (such as iron oxide red), ink, magnetic materials, and wood preservatives.

Auxiliary function: Used as a reducing agent in electroplating and in processes such as tanning and disinfection.

agriculture

Soil improvement: regulate acidity and alkalinity, alleviate plant yellowing disease, and promote chlorophyll synthesis.

Fertilizer and pesticide: used as iron fertilizer to supplement trace elements, while preventing and controlling diseases such as wheat smut and fruit tree rot.

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