摘要
通过Fe3+的水解平衡,对聚铁溶液中各种羟基配离子的分布进行了讨论,指出了多核配离子的形成与溶液的铁浓度和pH值有关;在铁完全水解形成长链多核聚合物时,其n(OH)∶n(Fe)可达到2;通过计算说明实际盐基度与测定结果之间差异产生的主要原因在于在pH值较低时,硫酸根的主要存在形式是HSO4-而不是SO42-。
The distribution of different hydroxy coordination ions by means of hydrolytic equilibrium of Fe3+. It is pointed out that the formation of the multinuclear coordination ions is related to the ferric concentration and pH value of the solution. When Fe3+ is fully hydrolyzed and forms long chain multinuclear polymer,its ratio of n(OH)/n(Fe) can be up to 2. Through calculation,it shows the main reason causing the difference between the actual basicity and the determination result is due to the main form of sulfate ion is HSO4- instead of SO42-, when the pH value of solution is lower.
出处
《工业水处理》
CAS
CSCD
北大核心
2005年第5期18-21,共4页
Industrial Water Treatment
关键词
聚合硫酸铁
盐基度
聚合
polyferric sulfate
basicity
polymerization
