Polymeric aluminum chloride adsorption bridging mechanism Poly aluminum chloride If the dosing agent is a water-soluble chain polymer and has the active site with the colloidal particles and fine suspended solids adsorption, it can by electrostatic attraction , Van der Waals gravitational and hydrogen bonding, etc., the particle bypass bridge as a floc (commonly known as alum flower). This effect is called adsorption bridging. Polymer chain molecules play a role in the bridge and bond. This mesh structure has a large surface area and strong adsorption capacity, which can adsorb clay, organic matter, bacteria and even dissolved substances. Adsorption bridging mechanism is mainly refers to the adsorption and bridging polymers and colloidal particles. It can also be understood that the two large, same-size particles are connected together by a different-sized particle. Polymeric flocculants have a linear structure. They have chemical groups that can interact with certain parts of the surface of the micelle. When the high polymer is in contact with the micelle, the groups react with the surface of the micelle to adsorb each other. While the rest of the polymer molecules extend in solution, which can be adsorbed by another particle that has vacancies on the surface, so that the polymer acts as a bridge. If there are few colloidal particles, the above polymer stretch does not adhere to the second colloid, so sooner or later this stretch will be absorbed by the original colloidal particles on other parts of the polymer can not play the role of bridging, and the colloidal And in a stable state. Polymer flocculant dosage is too large, will make the surface of the rubber particles produce a steady phenomenon. The bridged flocculation of the rubber particles, such as subject to vigorous stirring for a long time, bridging polymer may be from another particle surface detachment, and re-roll back to the original rubber surface, resulting in re-stable state. The polyaluminium chloride is yellow or light yellow in color, and the polyaluminium chloride is dark red or dark brown. The polyaluminum chloride is based on the fact that polyaluminum chloride has been developed for practical water treatment applications. It combines aluminum salts And iron salt coagulation advantages, the form of aluminum ions and iron ions have significantly improved the degree of polymerization has also greatly improved. Very soluble in water. It has the characteristics of floc forming block, high adsorption performance, good dewatering performance of sludge filtration, especially when dealing with high-turbidity water and low-turbidity water, and the treatment effect is obvious. In fact, polyaluminum chloride and polyaluminum chloride are two different concepts, polyaluminum chloride is a new type of inorganic polymer coagulant, the solid product is brown, reddish-brown powder.