基于膜技术处理离子型稀土矿开采废水的研究  

Study on the treatment of ion-type rare earth ore mining wastewater by membrane technology

作　　者：罗小娟 雷琼[2] LUO Xiaojuan;LEI Qiong(Gannan University of Science and Technology,Ganzhou 341000,Jiangxi,China;Ganzhou Center for Disease Control and Prevention,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣南科技学院,江西赣州341000 [2]赣州市疾病预防控制中心,江西赣州341000

出　　处：《有色金属科学与工程》2022年第6期145-154,共10页Nonferrous Metals Science and Engineering

基　　金：江西省教育厅科技项目(GJJ191593)。

摘　　要：探究了更加实用的膜技术应用于处理稀土矿开采的废水,提出采用两级反渗透膜浓缩加硫酸调pH值工艺,使得二级反渗透出水的氨氮浓度低至5.05 mg/L,清液可直接达标排放或回用。浓缩液再经过纳滤膜,可进一步分离稀土离子,稀土离子总回收率达到93.01%。纳滤膜的清液中只有硫酸铵,可作为浸出试剂再利用。此实验过程中稀土离子和氨氮资源都可被回收利用,具有较好的经济价值。This article explored the application of more practical membrane technology in the treatment of rare earth ore mining wastewater,and adopted a two-stage reverse osmosis membrane concentration process with sulfuric acid to adjust the pH value.The ammonia nitrogen concentration of secondary reverse osmosis effluent was 5.05 mg per liter so that the clear liquid of reverse osmosis could be directly discharged or reused.Thick liquid running through nanofiltration membranes separated rare earth ions.The total recovery of these ions reached 93.01%.Ammonium sulfate was the only solution in the supernatant of nanofiltration membranes,which could be reused as a leaching reagent.In this experiment,rare earth ions and ammonia nitrogen resources can be recycled and utilized,and thus have good economic value.

关 键 词：反渗透膜 纳滤膜 离子型稀土废水 硫酸铵溶液 

分 类 号：TD925.7[矿业工程—选矿] X703.1[环境科学与工程—环境工程]