【摘要】 聚硅酸锌絮凝剂由于其优良的絮凝性能和低金属残留,成为无机高分子絮凝剂中研究的热点。本文以硅酸钠、硫酸锌等为原料制备了聚硅酸硫酸锌絮凝剂,研究了适宜制备条件和对其絮凝性能的影响因素。结果表明:SiO2百分含量为3.0%、锌硅比为1.5、活化时间0.5 h时去浊率为最高;在絮凝使用过程中最佳投加量为1.0 mL/L、pH使用范围为6.4~10.0、絮凝沉降时间10 min。其絮凝效果在pH使用范围、沉降时间、絮凝体体成长速度优于聚硅酸铝絮凝剂。更多还原

【Abstract】 Poly-zinc silicate became the research hotspot that it had excellent flocculant property and lower metal remaining. Poly-zinc silicate was made by sodium silicate,zinc sulfate,etc.,and its optimal preparation condition and influencing factor to flocculant property were researched. The results indicated that the removal residual turbidity efficiency was culmination when w(SiO 2 %) = 3. 0%,n(Zn/Si) = 1. 5,activation time was 0. 5 h,the optimal dose was 1. 0 mL/L, pH range of application was 6. 4 ~ 10. 0 and flocculation sedimentation time was 10 min. It had wider pH range of application,sedimentation time and the rate of flocculating constituent grew up than that of poly-aluminum silicate flocculant.更多还原