摘要
以某化肥厂氨氮废水为研究对象,采用磷酸铵镁(MAP)沉淀法去除废水中氨氮,同时合成磷酸铵镁(鸟粪石)晶体。沉淀后上清液测定氨氮和总磷含量。MAP法去除氨氮的最佳条件,结果表明,以MgCl_2为镁盐,pH在10.5左右,n(P)∶n(N)=1.2。在此条件下,废水中氨氮去除率可达85.72%,废水氨氮浓度达到后期生化处理要求。扫描电镜和X射线衍射仪分析表明,生成的鸟粪石纯度较高,沉淀效果良好。
Using ammonion-nitrogen wastewater from chemical industry as the test subject,magnesium ammonium phosphate hexahydrate（MAP） was prepared by precipitation reaction.Concentration of ammonion-nitrogen was used in supernatant as the test subjects,the conclusion of the removal efficiency of ammonion-nitrogen under the optium reactive conditions was got.Optimal reaction conditions were determined as the following：using magnesium chlorideas magnesium salt;pH value 10.5;n（P）∶n（N）=1.2.Under the optimal reaction conditions the ammonion-nitrogen removal rate was 85.72%,and wastewater reached biochemical treatment after MAP precipitation.Combined with SEM and XRD analysis of the deposit crystals,generated at this time of struvite purity is higher,the precipitation effect is good.
出处
《应用化工》
CAS
CSCD
北大核心
2017年第8期1510-1513,1517,共5页
Applied Chemical Industry
基金
国家科技支撑计划课题资助(2014BAC13B00)
关键词
磷酸铵镁
氨氮废水
氨氮去除率
沉淀法
struvite
ammonion-nitrogen wastewater
removal efficiency of ammonium-nitrogen
precipitation method
