基于化学沉淀法的稀土氨氮废水处理研究  

Study on the Treatment of Rare Earth Ammonia Nitrogen Wastewater Based on Chemical Precipitation Method

作　　者：黄平丹 曹钰嵘 Huang Pingdan;Cao Yurong(Jiangxi Golden Century New Material Co.,Ltd.,Nanchang Jiangxi 330013)

机构地区：[1]江西金世纪新材料股份有限公司,江西南昌330013

出　　处：《山西化工》2023年第3期189-191,204,共4页Shanxi Chemical Industry

基　　金：中国智慧工程研究会“十四五”规划重点课题《硫化矿尾矿资源化利用研究(CN20210804)》。

摘　　要：以所排放的稀土氨氮废水达到标准为目的,研究基于化学沉淀法的稀土氨氮废水处理,通过磷酸铵镁沉淀法实现稀土氨氮废水中的氨氮去除。通过对比MgCl_(2)+Na_(2)HPO_(4)、MgSO_(4)+Na_(2)HPO_(4)、MgO+Na_(2)HPO_(4)、MgCl_(2)+NaH_(2)PO_(4)、MgSO_(4)+NaH_(2)PO_(4)6种沉淀剂,得出MgCl_(2)+Na_(2)HPO_(4)具有最佳的氨氮去除效果,对该沉淀剂展开深入分析,得出当pH值为9.5、反应时间为1.5 h、反应温度为25℃、沉淀剂配比为n(Mg^(2+))∶n(NH_(4)^(+))∶n(PO_(4)^(3-))=1.3∶1∶1.1时,氨氮去除效果最佳。In order to make the discharge of rare earth ammonia-nitrogen wastewater reach the standard,the treatment of rare earth ammonia-nitrogen wastewater based on chemical precipitation was studied.By comparing and MgCl_(2)+Na_(2)HPO_(4)、MgSO_(4)+Na_(2) HPO_(4)、MgO+Na_(2)HPO_(4)、MgCl_(2)+NaH_(2)PO_(4)、MgSO_(4)+NaH_(2)PO_(4) six precipitators,The removal effect of MgCl_(2)+Na_(2)HPO_(4) ammonia nitrogen was the best,when pH value is 9.5,reaction time is 1.5 h,reaction temperature is 25℃and the ratio of precipitator is n(Mg^(2+))∶n(NH_(4)^(+))∶n(PO_(4)^(3-))=1.3∶1∶1.1,the removal effect of ammonia-nitrogen is the best.

关 键 词：化学沉淀法 稀土氨氮废水处理 排放 

分 类 号：X756[环境科学与工程—环境工程]