PAC water purification principles detailed summary of the four points, specifically in the electric double layer compression and adsorption charge neutralization and adsorption bridging role, catching four precipitate website describes the mechanism. First, the electric double layer compression: micelle structure of the electrical double layer at the surface of the particles determines the highest concentration of the counter ion, with the distance between the outwardly facing surface of the particles the greater the lower the concentration of the counter ions, ions in solution eventually equal concentrations. When adding to the solution an electrolyte ion concentration in the solution increases, the thickness of the diffusion layer decreases. When two particles approach each other, the thickness of the diffusion layer is reduced, the potential decreases, so that they mutually repel force is reduced, that is, between the high concentration of ions in solution repulsion gel smaller than a lower ion concentration. Particles are not affected by suction between the composition of the aqueous phase, but due to thinning of the diffusion distance is reduced when they collide, and this suction inter big. See its rejection by the repulsion force and attracting mainly turn out to be the main attraction (repulsion potential disappeared), particles are quickly cohesion. This mechanism can explain the phenomenon of the harbor at the deposition, because fresh water into the sea, the salt increases, ion concentration increased, the stability of freshwater entrained particles is reduced, so the harbor at the clay and other colloidal particles are easily deposited. According to this mechanism, when the cohesion of the critical electrolyte solution, plus a lot of concentration exceeds condensation occurs, there will be no more over-the counter-ions into the diffusion layer, colloidal particles change the sign leaving a stable situation can not arise again. Such a mechanism is explained by purely static phenomenon electrolyte particles destabilization of the role, but it did not consider the role of other properties destabilization process (such as adsorption), and therefore can not explain the complexity of some of the other destabilization phenomena such as trivalent aluminum and iron salts as much coagulant dosage, the combination effect declines and even re-stabilize; and if the rubber band with the same number of electric polymer or organic polymer may have good cohesion effect: isoelectric state should has the best cohesion effect, but often ξ practice in the production potential of the coagulation effect is greater than zero, but at least the like. In fact coagulant in water to make colloidal destabilization phenomena related to the interaction of the particles with three coagulant particles with an aqueous solution, coagulant and solution, is a comprehensive phenomenon. Second, the charge neutralization and adsorption: adsorption sites and the role of electricity means the particle surface of the opposite sign ions, different numbers from rubber or chain with oppositely charged molecules have a strong adsorption, the adsorption and because of this it The part of the charge, reduces the electrostatic repulsion, which can easily adsorb the particles close to each other. In this case the electrostatic attractive force is often the main aspects of these effects, but in many circumstances, other than the role of electrostatic attraction. For example, dodecyl ammonium ion (silver iodide removal of turbidity of the solution caused by a negative charge, the ability was found with a monovalent organic amine ion removal is much more stable than the amount of particles will not cause re-dosing steady, while the organic amine ion is not, make the particles exceeds a certain phenomenon occurs when set to vote again steady, indicating that much of the anti-particles adsorbed ions, so that the negative charge of the original tape into positively charged. aluminum, iron also occurred in salt dosage is high then the charge becomes stable phenomenon and bring the mechanism of adsorption phenomena number above and use electricity in interpretation is appropriate three adsorption bridging action: bridging adsorption mechanism mainly refers to high adsorption of molecules with a bridge connected with the micelles may also be understood as two large number of particles with a different number due to the intermediate particles are connected together high-molecular flocculant has a linear structure, with the particles which have some parts of the surface chemical groups act, when a high polymer is in contact with the particles, to produce special group is reacted with the surface particles attract each other, while the remainder of the polymer molecules are stretched in the solution, vacancy with another surface adsorption of colloidal particles, such polymers will play a role in bridging the connection. If small particles, the adhesion of the polymer extending portion vain second rubber, then sooner or later, will be part of this stretch The original particles adsorbed on other parts of the polymer can not play the role of a bridge, and the particles but also in a stable condition. When the high-molecular flocculant dosing too large, the surface of particles will be stabilized to produce the phenomenon of saturation Already bridging flocculation of particles, such as by intense prolonged agitation, cross-linked polymer may be disengaged from the other rubber surface, again roll back to the original surface where the particles, resulting in a steady state again. polymers from the surface of adsorption particles of various physical and chemical effects, such as Van der Waals force, electrostatic attraction, hydrogen bonding, coordination bonding, etc., depending on the characteristics of both surfaces of the polymer particles with the chemical structure. This mechanism may explain the non-ionic ionic polymer flocculant with or without electricity number to get a good flocculation phenomenon. Fourth, the precipitate netting mechanism when metal salts (such as * aluminum or ferric chloride) or metal oxides and hydroxides (eg lime) as a coagulant while, when the dosing amount is sufficiently rapid precipitation of metal hydroxides (e.g. H) 3, H) 3, H) 2 or a metal carbonate (e.g., particles in the water of these precipitates can be When the netting is formed when the precipitates are positively charged (H) 3, and H) 3 in neutral and acidic precipitation speed can be due to the presence of the anion solution is accelerated, for example, * silver ions. Besides the core particles in water itself can be used as oxides of these metal oxide precipitate formed, so the optimum dosage of coagulant and inversely proportional to the concentration of the substance is removed, that is, the more particles, the less poly aluminum chloride dosage . Water Treatment Material Co., Ltd., Henan Hua polyacrylamide series products are imported technology to produce, is the number of other similar products on the market unmatched by a single point of view than similar products from the amount of the amount of savings, the estimated consumption obvious advantages, Henan, China Springs at the same time ensuring product quality assurance service, ready to help enterprises solve technical issues to provide technical support. Select Kasen, pack your satisfaction assured! Details can be found www.huaquan.com free hotline: 400-659-6388 Liu: 13703999293 QQ: 1724165193