新型含硼聚硅酸铝铁絮凝剂处理造纸废水及其性能的研究

Preparation of PSAFB Application in Papermaking Wastewater Treatment and Its Performance

利用硅酸钠、硫酸铝、硫酸铁、四硼酸钠制备一种新型无机高分子絮凝剂含硼聚硅酸铝铁(PSAFB),并通过单因素分析法确定了最佳制备条件:硅酸聚合pH为5、硅酸钠浓度为0.4mol/L、硅酸聚合温度50℃,n(Fe)∶n(Si)=0.5、n(Al)∶n(Si)=1.5、n(B)∶n(Si)=0.7。最后利用扫描电子显微镜,红外光谱分析和X射线衍射对絮凝剂的形貌结构和絮凝剂机理进行探讨。实验及表征结果表明:PSAFB絮凝剂的原料不是简单地混合,而是形成无定型的大分子聚合物,因此PSAFB絮凝剂具有很好的稳定性,对造纸废水具有优良的处理效果,且是一种较传统絮凝剂聚合氯化铁(PFC)、聚合氯化铝铁(PAFC)、聚合氯化铝(PAC)和聚硅酸铝铁(PSAF)优良的絮凝剂。

A new type of inorganic polymer flocculent called boron-containing polysilicate aluminum ferric （PSAFB） was prepared by using sodium silicate,ferric sulfate,aluminum sul- fate and sodium borate. The optimal preparation conditions were defined as follows： pH=5,CSi=0.4mol/L、T=50℃,n（Fe）：n（Si）= 0.5,n（A1） ：n（Si）=1.5、n（B ）：n（Si）=0.7. The pattern and floccu- lent mechanism of PSAFB were studied by using XRD,IR and SEM analysis method.The results show that the PSAFB is the raw material that is not simply mixed, but interaction to generat- ed atypical macromolecular polymers.So a flocculent has good effect, which is much better than that of PFC, PAFC, PAC and PSAF.