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原水中的碱度对铝盐和铁盐混凝沉淀水中的浑浊物影响很大,因为这些无机混凝剂水解速度的快慢取决于水中原有碱度的高低。Miller早在1924年的报导中就提到混凝中铝离子当量和氢氧根离子当量的比例问题,Matijevic等也观察到铝盐的水解作用与氢氧离子的比例有关。以前用来作混凝剂的铝盐大都是硫酸铝或硫酸铝钾,它们在混凝中的反应过程一般要需30～60分钟。近几年来,我们试制了一种702型快速浑水澄清剂,其成份有混凝剂碱式氯化铝和助
Alkalinity in raw water has a great impact on the turbidity of aluminum salt and iron salt coagulation precipitation water because the speed of hydrolysis of these inorganic coagulants depends on the level of alkalinity in the water. As early as 1924, Miller mentioned the ratio of aluminum ion equivalents to hydroxide ion equivalents in coagulation, and Matijevic et al. Also observed that the hydrolysis of aluminum salts is related to the ratio of hydroxide ions. Aluminum salts used in the past as coagulants are mostly aluminum sulfate or potassium aluminum sulfate, and their reaction process in coagulation generally takes 30 to 60 minutes. In recent years, we have trial-produced a type 702 fast muddy water clarifying agent, its ingredients are coagulant basic aluminum chloride and help