Our commonly used flocculants include polyacrylamide, polyaluminum chloride, polyaluminum iron chloride, polymeric ferric sulfate, ferrous sulfate, etc; Among these products, the price of polyacrylamide is relatively high, while the price of ferrous sulfate is relatively low; So when discussing the price of flocculants, we must distinguish which product it is in order to provide a relatively accurate quotation for flocculant prices; Today, let's talk about ferrous sulfate. Although ferrous sulfate, as a flocculant, is relatively inexpensive, it can also play a certain role;

Ferrous sulfate is a blue-green monoclinic crystal or particle, odorless product. Weathering in dry air and oxidizing to brown alkaline iron sulfate on the surface in humid air. It becomes a tetrahydrate at 56.6 ℃ and a monohydrate at 65 ℃. Soluble in water, almost insoluble in ethanol. Its aqueous solution oxidizes slowly in air when cold, and oxidizes quickly when hot. Adding alkali or exposure to light can accelerate its oxidation. Relative density (d15) 1.897. It is stimulating. Anhydrous ferrous sulfate is a white powder, with light green crystals containing crystalline water, commonly known as "green alum". When dissolved in aqueous solution, it becomes light green. Ferrous sulfate can be used as a chromatographic reagent and for the determination of platinum, selenium, nitrite, and nitrate in drop analysis. Ferrous sulfate can also be used as a reducing agent, manufacturing ferrite, water purification, polymerization catalyst, photographic plate making, etc.

The application of ferrous sulfate as a flocculant in industrial wastewater treatment is also common. Ferrous sulfate can be used as a flocculant in the treatment of industrial wastewater such as printing and dyeing factories, paper mills, electroplating factories, circuit board factories, food factories, pharmaceutical factories, fertilizer factories, pesticide factories, as well as in the flocculation, clarification, and decolorization of domestic wastewater. Ferrous sulfate can also be used to treat high alkalinity and high chromaticity wastewater such as chromium containing wastewater and cadmium containing wastewater, which can reduce the large investment of neutralizing acid.

So we cannot simply assume that ferrous sulfate is cheap and will not be used. As a flocculant, it can also play a good role in wastewater treatment.