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以硅酸钠、硫酸铝、硫酸镁、羧甲基纤维素钠为原料,制备了聚硅酸铝镁-羧甲基纤维素钠(PSi AM-CMC)无机-有机复合絮凝剂并应用于模拟的松花江水样的处理。结果表明,在n(Al+Mg)/n(Si)=0.6、n(Mg)∶n(Al)=1∶4、m(CMC)/m(Si)=0.3、羧甲基纤维素钠糊化温度为60℃、p H=2的条件下,制备的PSi AM-CMC对模拟江水的絮凝效果最好,色度、浊度去除率可达98%以上。采用SEM、FTIR、XRD对絮凝剂的结构进行表征,结果表明,PSi AM-CMC不是聚硅酸、金属盐和羧甲基纤维素钠的混合物,而是通过缩聚和配位反应,形成的一种兼具无机和有机絮凝剂优点的物质。
Sodium silicate, aluminum sulfate, magnesium sulfate and sodium carboxymethylcellulose were used as raw materials to prepare the polysilicate-sodium carboxymethylcellulose (PSiAM-CMC) inorganic-organic composite flocculant and applied to simulate Songhua River water sample processing. The results show that when the ratio of n (Al + Mg) / n (Si) = 0.6, n (Mg): n Under the condition of gelatinization temperature of 60 ℃ and p H = 2, the prepared PSi AM-CMC has the best flocculation effect on simulated river water, and the removal rate of color and turbidity can reach more than 98%. The structure of the flocculant was characterized by SEM, FTIR and XRD. The results showed that PSi AM-CMC was not a mixture of polysilicic acid, metal salt and sodium carboxymethylcellulose, but was formed by polycondensation and coordination reaction A combination of the advantages of inorganic and organic flocculants.