摘要
我们基于溶液电离平衡、质子平衡、离子活度原理以及法拉第分布电解定律 ,建立了精确测量碳酸钙过饱和溶液在析晶过程中所有离子变化的试验系统 ,并使用该系统研究了阻垢剂聚丙烯酸和多聚磷酸钠对碳酸钙析晶过程的影响。试验中使用了植晶的方法 ,保证了试验具有高重复性。试验研究表明 ,静态法所定义的阻垢率数值易受溶液过饱和度的影响 ,但是动力学方法测量的阻垢剂的阻垢阈值不受影响。
The effect of two threshold indibitors, sodium polyphosphate(SPP) and polypropylene acid (PAA) on the precipitation of calcium carbonate were investigated. The formation of species from solution was computed from the recorded conductivity values and mass-balance and charge-balance equations by successive approximations for the ionic strenght. The nano-scale crystals of calcium carbonate was seeded. This made the experiments reproducible. The inhibitors' threshold in our experiments was independent on the solution's supersaturation and inhibitor effectiveness defined by static method was sensitive to supersaturation.
出处
《水处理技术》
CAS
CSCD
北大核心
2001年第3期148-151,共4页
Technology of Water Treatment
基金
国家自然科学基金资助重点项目 (5 973 815 0
