详细信息

水中稀释对聚合氯化铝形态分布的影响    

THE EFFECT OF DILUTION WITH WATER ON THE SPECIATION OF POLYMERIC ALUMINUM CHLORIDE (PAC)

文献类型:期刊文献

中文题名:水中稀释对聚合氯化铝形态分布的影响

英文题名:THE EFFECT OF DILUTION WITH WATER ON THE SPECIATION OF POLYMERIC ALUMINUM CHLORIDE (PAC)

作者:姚重华[1];孙尧俊[2];赵丕裕[2];费伦[2]

机构:[1]华东化工学院环境工程系;[2]复旦大学分析测试中心

年份:1991

卷号:10

期号:2

起止页码:1

中文期刊名:环境化学

外文期刊名:Environmental Chemistry

收录:CSTPCD;;北大核心:【北大核心1992】;CSCD:【CSCD2011_2012】;

基金:国家自然科学基金

语种:中文

中文关键词:混凝剂;聚合氯化铝;铝;分布;水处理

摘要:本文用^(27)Al NMR、超离心沉降平衡及计时比色分析等方法,研究了水中稀释对水处理混凝剂聚合氯化铝(PAC)中铝的形态分布的影响。结果表明,若PAC的羟铝比(r)≤2.0时,水中稀释(Al_T<0.5 mol/l)会导致PAC羟铝聚合大分子(聚合度>13)的分解,产生聚合度较小的组分;羟铝比越小,这种倾向越大。PAC与硫酸铝在使用中的一个区别是,前者在水中分解,形态“由大到小”,后者在水中聚合,形态“由小到大”。
The effect of dilution in water on the aluminum speciation of polymeric aluminum chloride (PAC) was investigated with three methods, involving nuclear magnetic resonance, ultracentrifuge processor, and timed colorimetric analysis, respectively.The results show that if the ratio of OH/A1 is less than or equal to 2.0, the dilution may cause the decomposition of aluminum big polymers (the degree of polymerization is much larger than 13), producing small ones.The lower the ratio of OH/A1, the stronger the decomposition is. This means that the speciation of PAC tends to change 'from big to small' , while that of alum 'from small to big' .

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