As we all know, China is a country with scarce water resources. Environmental protection is the key to ensure the sustainable development of the material basis. The protection of water, treatment of water pollution is an important part of environmental protection, so the application of polyacrylamide PAM in water treatment is of particular significance. Polyacrylamide is the world's most widely used, the highest performance of organic polymer flocculants, which is also the most popular used flocculants in China currently. Polyacrylamide is mainly sold in two forms of goods, one is powder, and one is emulsion. The most commonly used is powder products as emulsion is not easy to transport and not convenient to use. There are cationic, anionic and non-ionic several types polyacrylamide, suitable for different purposes and different flocculation objects. Polyamide (PAM) amide (-CONH2) can be affinity with many substances, adsorption to form hydrogen bonds. The high molecular weight PAM...