Advantages and disadvantages of aluminum salt coagulant in drinking water analysis Advantages and disadvantages of aluminum salt coagulant in drinking water Advantages and disadvantages of aluminum salt widely used in drinking water and various industrial water supply turbidity removal, bleaching, and sewage treatment , Algae, silicon, iron, manganese and other treatment is often used, can replace iron-based water purifying agent can not handle the occasion. However, with the gradual deepening of people's understanding of their behavior in the water, some problems have also been found in the use of aluminum salts. 1, the toxicity problem: the potential damage of aluminum salt in the human body has caused the people's attention. Drinking water is too high in aluminum, it will inhibit the body's absorption of phosphorus, destroy the normal ratio of calcium and phosphorus, affecting people's intelligence and physical health, it may be the root cause of Alzheimer's disease and other diseases. China's GB5749-2006 drinking water standard requires aluminum limit of 0.2mh / L2, aluminum hydrolysis range is small, the operating conditions should not be controlled, because AL (OH) 3 is a typical amphoteric hydroxide, PH treatment of water is too high PH & gt; 9.0) or too low (pH & lt; 5.5) will cause it to dissolve, i.e. increasing the amount of flocculant and increasing the aluminum content in the water. If the effluent is used as feedwater for desalination or recirculating cooling water, the aluminide contaminates the cationic resin and correspondingly increases the consumption of phosphorus-based corrosion and scale inhibitors. 3, poor turbidity removal ability at low temperature: aluminum salt is more sensitive to changes in water temperature, iron salt hydrolysis rate is low at room temperature, floc precipitation speed is small, so in the case of low temperature will lead to AL (OH) 3 drastic reduction in flocculation Poor, dwell time increases during water treatment. Dehumidification experiments show that the low temperature, a large amount of aluminum salt, the formation of the reaction cell alum is very small, and sometimes the turbidity turbidity than the original high. 4, aluminum flocculants susceptible to salts, phosphorus removal is poor, such as chloride can reduce the flocculation of alum; in order to prevent oxygen-rich water oxidation, the requirements of phosphorus removal, but the aluminum removal of phosphorus The amount of iron than iron, and by the degree of alkalinity. 5, In addition, the long-term use of aluminum salt water purification agent will result in the increase of water pipe network residual content and its distribution of morphological changes. This article refers to the aluminum sulfate aluminum products, this product belongs to the domestic and foreign products eliminated, the current can no longer meet the normal water treatment, has been replaced by high-performance polyaluminum chloride and become the leader in water treatment chemicals. This information is from the filter source water purification Li from http://www.gyzhenyu.com/ finishing release, for transfer, please specify the way to the address!