碱熔融法合成粉煤灰沸石  

Synthesis of Zeolite from Fly Ash by Alkali Melting Process

作　　者：张晶晶[1] 张雪峰[1] 林忠 吕保义[3] 王曦[1] 

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010 [2]包头环境科学研究院,内蒙古包头014010 [3]包头市环境监测站,内蒙古包头014010

出　　处：《化工环保》2012年第4期358-361,共4页Environmental Protection of Chemical Industry

基　　金：国家环境保护部环保公益性行业科研专项(200909032)

摘　　要：采用碱熔融法合成粉煤灰沸石。正交实验结果表明:影响粉煤灰沸石吸附氨氮性能的各因素大小顺序为煅烧温度>m(氢氧化钠)∶m(粉煤灰)>煅烧时间;最佳工艺条件为煅烧温度650℃,煅烧时间60 min,m(氢氧化钠)∶m(粉煤灰)=1.2;在此最佳条件下合成的粉煤灰沸石对氨氮的去除率为69.3%。XRD仪和SEM表征结果表明:粉煤灰经碱熔融后,原有的惰性物质(石英和莫来石)的晶体结构被有效破坏,粉煤灰的活性得到了提高;经碱熔融后的粉煤灰失去原有的球状形态,形成分散的粉煤灰熟料。Zeolite was synthesized from fly ash by alkali melting process. The expenimental results show that the affecting factors follow the order of calcination temperature〉m（NaOH） ： m（coal fly ash）〉calcination time. The optimum process conditions are as follows ： calcination temperature 650 %, calcination time 60 min, m（NaOH）： re（coal fly ash）=1.2. The ammonia nitrogen removal rate on the zeolite synthesized from fly ash under these conditions is 69.3%. The XRD and SEM results show that： After melting, the crystal structure of the original inert materials such as quartz and mullite are effectively destructed and the activity of fly ash is improved; The melted coal fly ash lost its original spherical shape and took the form of dispersive fly ash clinker.

关 键 词：粉煤灰 沸石 碱熔融 氨氮 吸附剂 废水处理 

分 类 号：X705[环境科学与工程—环境工程]