聚硅酸铝铁絮凝剂的制备及其在印染废水处理中的应用  

Preparation of Flocculant Polysilicate Aluminium Ferric and Its Application in Dyeing Wastewater Treatment

作　　者：顾玲[1] 马宇锋[1,2] 李政[1] 庄皇龙 

机构地区：[1]陕西科技大学化学与化工学院教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]陕西延长石油集团炼化公司,陕西延安717208

出　　处：《化工环保》2010年第3期254-257,共4页Environmental Protection of Chemical Industry

摘　　要：以粉煤灰为主要原料制备了聚硅酸铝铁絮凝剂。通过L16(45)正交实验得出粉煤灰中Al3+和Fe3+的最佳浸取实验条件为焙烧温度900℃,m(Na2CO3)∶m(粉煤灰)=0.10,浸取温度为70℃,盐酸质量分数20%,浸取时间为2.0h。通过L9(34)正交实验得出聚硅酸铝铁的最佳制备条件为n(聚硅酸)∶n(Al3+)=1∶0.5,n(聚硅酸)∶n(Fe3+)=1∶0.5,浸出液pH为5.0,熟化温度为60℃。利用制得的聚硅酸铝铁絮凝剂对200mL模拟印染废水进行处理,在絮凝剂加入量为4mL时絮凝效果最好,透光率超过70%。Flocculant polysilicate aluminium ferric was prepared using fly ash as major raw material.The results of L16(45) orthogonal experiments show that the optimum conditions for leaching Al3+ and Fe3+ from fly ash are as follows: calcination temperature 900 ℃,m(Na2CO3) ∶m(fly ash)=0.10,leaching temperature 70 ℃,hydrochloric acid mass fraction 20%,leaching time 2.0 h.The results of L9(34) orthogonal experiments show that the optimum conditions for preparing polysilicate aluminium ferric are as follows: n(poly silicic acid) ∶n(Al3+)=1 ∶0.5,n(poly silicic acid) ∶n(Fe3+)=1 ∶0.5,leaching solution pH 5.0,curing temperature 60 ℃.200 mL of the simulated dyeing wastewater was treated using the prepared flocculant.When the flocculant dosage is 4 mL,the flocculation effect is the best with more than 70% of transmittance.

关 键 词：粉煤灰 聚硅酸铝铁 絮凝 印染废水 废水处理 

分 类 号：X703.5[环境科学与工程—环境工程]