聚硅酸/聚丙烯酰胺复合絮凝剂的研究  

Poly(silicic acid)/Polyacrylamide Composite Flocculant for Oil-containing Waste Water Treatment

作　　者：张永明[1] 邹静[2] 苗宗成[1] 赵阳[1] ZHANG Yongming ZOU Jing MIAO Zongcheng ZHAO Yang(Department of Applied Statistics and Science,Xijing University, Xi＇an 710123, China Department of Chemical Engineering, Shaanxi Institute of Technology, Xi＇an 710300, China)

机构地区：[1]西京学院应用统计与理学系,陕西西安710123 [2]陕西国防工业职业技术学院化学工程系,陕西西安710300

出　　处：《中国塑料》2016年第10期81-85,共5页China Plastics

基　　金：西京学院科研基金(No.XJ160145);国家自然科学基金面上项目(No.51673157);陕西省教育厅科研计划项目(No.11JK0845;No.15JK2188)

摘　　要：以硅酸钠为前驱体,制备得到硅溶胶,然后采用原位聚合法一步合成了聚硅酸/聚丙烯酰胺复合絮凝剂,通过红外光谱对合成产物的结构进行了表征。采用透光率、化学需氧量去除率对絮凝剂的絮凝效果进行了表征,并探讨了聚硅酸pH值、老化时间、聚合反应温度和时间等合成条件对絮凝效果的影响。结果表明,当硅酸钠浓度为0.5 mol/L、聚硅酸pH=5、老化时间为24 h、丙烯酰胺为5 g、引发剂用量为0.3 g,聚合反应温度为70℃、时间为90 min时,得到的聚硅酸/聚丙烯酰胺絮凝剂的絮凝效果最佳。Silica sol was prepared by using sodium silicate as a precursor, and then the poly（silicic acid）/polyacrylamide composite flocculant was synthesized through in-situ polymerization. The chemical structure of the composite flocculant was characterized by Fourier-transform infrared spectroscopy （FTIR）. The effects of pH value, reaction time and temperature on flocculation effectiveness were investigated by light transmittance and removal ratio for the oil-containing waste water. It was found that the composite flocculant exhibited the best flocculation performance when the synthetic conditions were set to the sodium silicate concentration of 0. 5 tool/L, the acrylamide amount of 5.0 g, the initiator amount of 0. 3 g, the i3oly（silicic acid） acidity of pH=5, the reaction time of 90 min, the aging time of 24 h, and the temperature of 70 ℃.

关 键 词：聚丙烯酰胺 聚硅酸 复合絮凝剂 石油废水 

分 类 号：X703[环境科学与工程—环境工程]