聚硅氯化铝(PASC)混凝剂的混凝性能

The Coagulating Property of Polyaluminum Silicate Chloride(PASC)

研究Ａｌ／Ｓｉ摩尔比及制备工艺对聚硅氯化铝（ＰＡＳＣ）混凝效果的影响，比较ＰＡＳＣ和聚合氯化铝（ＰＡＣ）的混凝效果．结果表明，ＰＡＳＣ较ＰＡＣ混凝效果好．Ａｌ／Ｓｉ摩尔比和制备工艺对ＰＡＳＣ的混凝效果有影响．用共聚法制备的ＰＡＳＣ（共），Ａｌ／Ｓｉ摩尔比降低，其混凝效果提高，但复合法制备的ＰＡＳＣ（复），Ａｌ／Ｓｉ摩尔比过高或过低，均不利于其混凝效果的提高，ＰＡＳＣ（共）的混凝效果稍优于ＰＡＳＣ（复）的混凝效果．

The effect of Al/Si molar ratio and the preparation technique on the coagulation of polyaluminum silicate chloride (PASC) was studied, and the coagulation efficiency of PASC was also compared with that of polyaluminum chloride (PAC) by jar test. The experimental results show that PASC is characterized by having better coagulation efficiency, compared with PAC. The PASC prepared by copolymerization technique give a little better coagulating effect than PASC prepared by composite technique under the same Al/Si molar ratio. For the PASC prepared by copolymerization technique, in the range of Al/Si=5～15, the less the Al/Si molar ratio, the better the coagulation efficiency. For the PASC prepared by composite technique, however, the PASC with molar ratio of Al/Si=10 gives best coagulation efficiency.