Ferrous sulfate: alias: ferrous, ferrous sulfate heptahydrate, green vitriol, drying ferrous sulfate, can be used as a reducing agent in electroplating plants, etc., as a flocculant in industrial wastewater, as a precipitant in printing and dyeing plants, and as iron The raw material of the red plant, as the raw material of the pesticide factory, as the raw material of the chemical fertilizer factory Chemicalbook, fertilization in the ferrous sulfate flower and so on. It is widely used in the flocculation, clarification and decolorization of printing and dyeing, papermaking, domestic sewage and industrial wastewater. Ferrous sulfate can also be used to treat chromium-containing wastewater and cadmium-containing wastewater. The treatment of high alkalinity and high chroma wastewater can reduce the use of acid for neutralization. massive investment.