How does ferrous sulfate flocculate and precipitate suspended solids?

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This post was last edited by slll611 on 2016-9-29 at 22:18. With the growth of the water treatment industry, water treatment materials have also seen an increase in demand; various high-quality water treatment materials have emerged one after another. Among these, ferrous sulfate stands out as a material that is widely used. Why is ferrous sulfate so popular? This also brings us to the way ferrous sulfate facilitates the flocculation and precipitation of suspended solids. What is flocculation and sedimentation? Ordinary wastewater contains a large amount of tiny suspended particles, and these particles carry the same charge. As we know, like charges repel each other while opposite charges attract. These particles with the same charge exert a repulsive force on one another. Due to their extremely low mass, they do not reach the weight required for sedimentation; as a result, these suspended particles continue to move randomly in the water, preventing the water from becoming clear. Flocculation and sedimentation involve using various methods to attach these tiny suspended particles together, increasing their weight enough so that they can settle naturally. Once this happens, the sediment can be separated from the water. http://www.qkgs.net/uploads/allimg/160905/2-160Z50Z013Z4.jpg How does ferrous sulfate facilitate the flocculation and sedimentation of suspended particles? Ferrous sulfate is used in combination with polyacrylamide; after being mixed in the appropriate proportions and fully dissolved in water, it is added to the wastewater that needs treatment. This mixture creates a dual-electron layer, which disrupts the stability of the suspended particles. It also absorbs the charges on these particles, eliminating the repulsive forces between like-charged particles. Without this repulsion, the suspended particles gradually get attached to the charged colloids, forming flocs. As the weight of these flocs increases and they reach the weight necessary for sedimentation, they settle to the bottom of the water, thereby separating the suspended particles from the water and allowing them to be removed. To enhance the flocculation process, coagulants can be added in appropriate amounts at the right time, which improves the efficiency of flocculation. The future prospects of ferrous sulfate As a coagulant, ferrous sulfate is easy to use, has a low cost, results in clean water, and does not cause secondary pollution. Its properties and advantages offer promising prospects for the development of water treatment technologies.