聚氧化乙烯对聚合氯化铝形态分布及絮凝能力的影响

本文研究了聚氧化乙烯( PEO)的引入对 Al( III)的水解聚合过程、成品聚合氯化铝 ( PAC)中铝的形态分布及絮凝能力的影响. 结果表明, PEO的引入使碱滴定过程中 Al( III)的水解聚合过程提前,所制得的改性 PAC抗酸性增加,含有更多的不能被 Al-Ferron方法所解离-络合的形态,在室温下存放更为稳定. PEO的引入能明显提高 PAC的絮凝能力 ,加快絮体沉降速度. 两种引入方法中,先加入法的效果优于后加入法.

The effects of polyethylene oxide on species distribution and flocculating ability of polyaluminum chloride.

The hydrolysis\|polymerization process of Al(III),species distribution of polyaluminum chloride and its flocculating ability were studied when polyethylene oxide(PEO) was introduced. Experimental results show that the introduction of PEO advances the hydrolysis\|polymerization of Al(III) during the alkali addition and stabilizes PAC solution. It is more hard to be acid\|depolymerized and contains more species that cannot be depolymerized and complexed by Al\|Ferron method. The results also show that the introduction of PEO markedly improves the flocculating ability of PAC and increases the settling speed of flocs. As to the different ways of introduction, the before\|addition is better than the after\|addition.