用流动电流技术研究聚硅氯化铝混凝剂的电动特性

采用流动电流（SC）技术，研究比较了聚硅氯化铝（PASC）与聚合氯化铝（PAC）的电动特性．研究结果表明，在PASC中，由于带负电荷的聚硅酸与铝水解聚合产物间的相互作用，使得PASC的电中和能力较PAC有所下降，其下降程度与PASC的碱化度（B）和Al/Si摩尔比密切相关，B值和Al/Si摩尔比越小，则PASC的电中和能力就越弱．制备工艺对PASC的电中和能力略有影响.

Electrokinetic characteristic of flocculant polyaluminum silicate chloride(PASC) by streaming current measurement

The electrokinetic characteristics of polyaluminum silicate chloride flocculant (PASC) and polyaluminumchloride (PAC) were studied and compared by streaming current (SC) technique. The outcome results shows that the interaction between polysilicic acid with negative charge and hydrolyzed aluminum species results in the decrease of thecharge-neutralizing ability of PASC as in comparison with PAC, the charge-neutralizing ability of PASC has close relationwith the basicity (B) and Al/Si molar ratio in PASC. The less the B value and Al/Si molar ratio, the lower the chargeneutralizing ability of PASC. The preparation technique for PASC affects the charge-neutralization of PASC to a littleextent.