磷酸铵镁沉淀法预处理垃圾渗滤液中的NH_4^+  

NH_4^+ Removal for Landfill Leachate Using Struvite Pretreatment Method

作　　者：岳秀[1] 李小明[1] 申婷婷[1] 郑伟[1] 王冬波[1] 曹建兵[1] 

机构地区：[1]湖南大学环境科学与工程学院环境生物与控制教育部重点实验室,湖南长沙410082

出　　处：《广州化工》2011年第16期4-6,16,共4页GuangZhou Chemical Industry

基　　金：国家自然科学基金项目(51078128)

摘　　要：采用磷酸铵镁法预处理垃圾渗滤液中的氨氮。结果表明:当pH值为9.5,温度为20℃,[Mg2+]/[NH4+]/[PO34-]摩尔比为0.8∶1∶1,反应时间为20 min,静置时间为20 min时,NH4+的去除率达到100.0%。经SEM分析,沉淀物中立方型晶体为磷酸铵镁,针状型晶体可能为磷酸铵镁与磷酸镁的混合物。经EDS分析,该方法不但能有效去除NH4+,还可以同时去除垃圾渗滤液中的其他污染物质。The struvite pretreatment method was used to remove NH＋4 in raw landfill leachate.The results were revealed that the NH＋4 removal efficiency was up to 100.0% when pH was 9.5,temperature was 20 ℃,molar ratio of // was 0.8：1：1,reaction time was 20 min and settling time was 20 min.SEM images were indicated that the cubic crystals were identified as struvite,and the acicular crystals were identified as the mixture of struvite and magnesium phosphate.EDS analysis of precipitates after experiment was demonstrated that this method could not only remove NH＋4,but also remove other pollutant in raw landfill leachate.

关 键 词：垃圾渗滤液 磷酸铵镁 NH4+ 

分 类 号：TQ127.2[化学工程—无机化工]