Common coagulants used for treating drinking surface water include: Aluminum sulfate (Al2(SO4)3·18H2O) Ferric sulfate (Fe2(SO4)3·9H2O) Ferric chloride (FeCl3) Sodium aluminate (NaAlO2·12H2O) These coagulants are all positively charged metal salts. When they are added to water, they react with negatively charged particles in the water, such as dirt, bacteria, and viruses. This reaction causes the particles to aggregate, forming a precipitate called flocculents. The flocculents are then removed from the water through sedimentation and filtration. The choice of coagulant depends on many factors, including the type of water being treated, the required treatment level, and the cost of the coagulant. Aluminum sulfate is a very commonly used coagulant because it is relatively inexpensive and effective. However, it also leaves residual aluminum in the water, which may be a concern for some. Ferric sulfate and ferric chloride are more expensive than aluminum sulfate, but they are also more effective at removing certain types of particles. Sodium aluminate is a less common coagulant, but it is often used in combination with other coagulants to improve treatment results. Besides the coagulants listed above, there are many other coagulants that can be used to treat drinking surface water. These include: polymer coagulants Polymers are long, positively charged molecular chains. They function similarly to metal salts, reacting with negatively charged particles in water to form flocs. Natural coagulants are derived from plants or animals. They are often used in combination with other coagulants to improve treatment effectiveness. There are many common polymeric coagulants used in water treatment. These include: Cationic coagulants are strong cationic polyelectrolytes, appearing as colorless to pale yellow viscous liquids. In water treatment, they possess both strong charge neutralization and adsorption bridging properties, thus exhibiting excellent flocculation and sedimentation performance. Cationic coagulants also show significant effects in decolorization, algae control, and removal of organic matter. They are often used in combination with polyaluminum chloride.
Polyacrylamide (PAM):
PAM is a synthetic polymer commonly used as a coagulant in water treatment. It consists of long molecular chains carrying a positive charge. When
PAM is added to water, it reacts with negatively charged particles in the water to form flocs. These flocs are then removed from the water through sedimentation and filtration.
Polydiallyl dimethylammonium chloride (PolyDADMAC): PolyDADMAC is another synthetic polymer commonly used as a coagulant in water treatment. It consists of long molecular chains carrying a positive charge. When PolyDADMAC is added to water, it reacts with negatively charged particles in the water to form flocs. These flocs are then removed from the water through sedimentation and filtration. Natural coagulant Chitosan: Chitosan is a natural polymer derived from chitin, a substance found in the exoskeletons of insects and crustaceans. Chitosan consists of long, positively charged molecular chains. When chitosan is added to water, it reacts with negatively charged particles in the water, forming flocs. These flocs are then removed from the water through sedimentation and filtration. The choice of polymeric coagulants depends on many factors, including the type of water being treated, the required treatment level, and the cost of the coagulant. The use of coagulants is part of the drinking water surface water treatment process. By removing suspended solids and other particles from the water, coagulants help make the water safe to drink. The main products of flocculant manufacturer Xinhuan Water Treatment are: White polyaluminium chloride (food grade), drinking grade polyaluminium chloride, industrial grade polyaluminium chloride, anionic polyacrylamide, cationic polyacrylamide, nonionic polyacrylamide, petroleum recycling polyacrylamide, oil recovery polyacrylamide, polyacrylamide, polymer flocculant polymer flocculation coagulant, polymeric ferrous sulphate, polymerized iron and aluminium chloride, and other water treatment chemicals. Welcome customers to write to us to negotiate business! Tel/WhatsApp：86 19139972558 Email：Sunny@xhwtm.com Contact:Sunny
