改性粉煤灰絮凝剂的制备及处理煤泥水的研究  

Preparation and application of fly ash modified by polymethylacrylic acid

作　　者：宫铭[1] 张冬冬[1] 曲建林[1] 于伟[1] 

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054

出　　处：《洁净煤技术》2016年第4期38-41,116,共5页Clean Coal Technology

基　　金：陕西省自然基础研究计划资助项目(2014JQ2051)

摘　　要：通过亲水性单体的表面接枝聚合改善粉煤灰的表面亲水性,增加与水的接触,从而提高其净化污水效果。将粉煤灰分散在甲基丙烯酸溶液中聚合,制备聚甲基丙烯酸改性粉煤灰絮凝剂,然后对吸水率、红外、热重和SEM进行表征,并通过煤泥水的沉淀试验对絮凝能力进行研究。结果表明,该方法将甲基丙烯酸接枝聚合在粉煤灰表面制备FA-MA20絮凝剂,可以改善粉煤灰的亲水性,对煤泥水具有良好的絮凝能力。通过改善粉煤灰表面亲水性的方法可以提高对煤泥水的净化效果,对粉煤灰的综合利用及煤泥水处理具有重要的应用前景。In order to increase sewage purification of fly ash,the surface grafting of hydrophilic monomers was used to improve the surface hydrophilic and contact with water.The modified fly ash was prepared by free radical polymerization of methacrylic acid and fiy ash. The modified fly ash was characterized by the water absorption,IR,TG and SEM.The coal slime sedimentation experiments of the modified fly ash were also conducted.The results suggested that the method of modified FA-MA20 had a good flocculation ability of coal slurry through grafting polymerization of methacrylic acid. It was an important application prospect for the comprehensive utilization of fly ash and the treatment of coal slurry by improving the hydrophilicity of fly ash surface.

关 键 词：污水处理 粉煤灰 聚甲基丙烯酸 煤泥水 絮凝剂 

分 类 号：X703.5[环境科学与工程—环境工程]