新型聚硅酸铝锌-淀粉复合絮凝剂的制备及其表征

以聚硅酸(PSi)、硫酸铝、硫酸锌、食用淀粉(St)为主要原料制备一种新型有机-无机复合絮凝剂--聚硅酸铝锌-淀粉(PSiAZ-St).采用红外光谱、扫描电镜和X-射线衍射分析手段对絮凝剂产品的结构特征进行了表征.研究结果证明:淀粉与聚硅酸金属盐复合成功,并增强了聚硅酸金属盐的性能,表现出更好的絮凝效果.对制备条件的优化结果表明:当(Al+Zn)/Si的摩尔比为1,Al/Zn的摩尔比为1:9,St/Si的质量比为1,pH值为1.5时,絮凝效果优良.制备的PSiAZ-St絮凝剂用于处理松花江原水时,色度、浑浊度去除率均可达98%以上.

Synthesis and Characterization of a Novel Composite Flocculant PSiAZ-St

The poly-silicate-aluminum-zinc-starch ( PSiAZ-St ) flocculant was a new type of organic-inorganic composite flocculant , which was synthesized from polysilicic acid , aluminum sulfate , zinc sulfate and starch .The micro-morphology and structure of PSiAZ-St were studied by scanning electronic microscope ( SEM ) , fourier transform infrared spectrum ( FTIR ) and X-ray diffraction ( XRD ) .The coagulation-flocculation process shows that the optimal conditions for synthesis conditions are that n( Al+Zn)/n(Si) is 1, n(Al)/n(Zn) is 1:9, m(St)/m(Si) is 1, pH value is 1.5.The removal rates of chroma and turbidity could achieve 98% about dealing with Songhua River samples with PSiAZ-St flocculant.