聚硅氯化铝絮凝剂的中聚合态特征

以正硅酸（TEOS）与聚合氯化铝（PAC）复合制备了新型聚硅氯化铝絮凝剂（TEOS-PAC），基于铝硅复合絮凝剂中中聚合态Alb，Sib是最具凝聚一絮凝反应活性的成分，采用Al-Ferron逐时络合比色法和Si-Mo逐时络合比色法研究了Alb，Sib的形态变化特征，并与以聚硅酸为硅源的传统聚硅氯化铝絮凝剂（PS—PAC）作了比较．同时，还利用。^27Al NMR谱图对Alb形态特征作了进一步验证．结果表明：TEOS—PAC样品的Alb形态含量略低于传统的PS—PAC样品，但其Al13形态含量却较高；两种样品的Alb形态和Sib形态含量随Si／A1摩尔比变化的程度都取决于碱化度B值，但铝形态和硅形态的变化方向却相反，且与传统聚硅铝样品PS—PAC相比，TEOS—PAC样品的Sib形态特征规律更明显．

Media Polymers Species Characteristics of Polyaluminum Silicate Chloride

A new type of polyaluminium silicate chloride(TEOSPAC) was prepared by mixing tetraethylorthosilicate(TEOS) with polyaluminium chloride(PAC).Based on being the most active ingredients,the aluminum(b) and silicate(b) species characteristics in TEOS-PAC were investigated by Al-Ferron and Si-Mo complexation-timed spectrophotometric methods respectively,which was compared with the conventional product(PS-PAC).The aluminum(b) species characteristics were further validated by~(27)Al NMR spectroscopy.The results show that TEOS-PAC has a lower content of the Al(b) species and higher content of the Al(13) species.The different effects of Si/Al molar ratio on the contents of aluminum(b) and silicon(b) species are decided by basicity(B).Silicon(b) species characteristics of TEOS-PAC are more obvious.