以吸附法与化学沉淀法的集成技术组成氨氮废水处理的闭路循环系统,用自制的MgHPO4 (MHP)为吸附剂,对NH4+浓度为5175mg/L稀土硫酸铵废水进行了氨氮吸附性能实验,研究发现pH、MHP的投加量和氨氮初始浓度是影响氨氮去除效果的关键因素.在室温下,调节反应体系pH =9.5,MHP用量按摩尔比n(MHP)∶n(NH4+)=2∶1投料,搅拌吸附30min,氨氮去除率可达85.7％,且氨氮初始浓度越高,吸附效果越好.MHP再生与循环使用实验表明,MAP焙烧可使MHP再生,同时可回收高浓度的氨水,MHP循环使用三次,氨氮的去除率均在70％以上.如果采用MHP二级吸附法后,再用MAP沉淀法处理废水,可使出水氨氮浓度降低为87mg/L,累计氨氮去除率可达到98％以上.
参考文献
| [1] | 仝武刚,王继徽.磷酸铵镁除磷脱氮技术[J].工业用水与废水,2002(05):4-6. |
| [2] | Rettmer R S .The simultaneous chemical precipitation of ammonium and phosphate in the form of magnesium-ammonium-phosphate[J].Water Science and Technology,1991,23:659-667. |
| [3] | 许延辉,胡卫红,徐海平.利用稀土冶炼氨氮废水制备磷酸铵镁的研究[J].稀土,2006(06):55-58. |
| [4] | 钟金松,闵育顺,肖贤明.浅谈高浓度氨氮废水处理的可持续发展方向[J].环境科学与技术,2008(02):92-94,147. |
| [5] | Siegrist H .Nitrogen removal from digester supernatant-comparison of chemical and biological methods[J].Water Science and Technology,1996,34(1-2):399-406. |
| [6] | 叶长明;王春霞;金龙珠.21世纪的环境化学[M].北京:科学出版社,2004:156-157. |
| [7] | 唐建军,文艳芬,邹原,张伟,周康根.MAP热分解产物的氨氮吸附性能研究[J].环境工程学报,2009(04):625-629. |
| [8] | 王丽娟,孙体昌,郑亚杰.用磷酸铵镁制备废水处理中氨氮吸附剂的研究[J].化工安全与环境,2007(12):19-21. |
| [9] | Shigeru Sugiyama;Masahiko Yokoyama;Hisaaki Ishizuka;Ken-Ichiro Sotowa;Tahei Tomida .Removal of aqueous ammonium with magnesium phosphates obtained from the ammonium-elimination of magnesium ammonium phosphate[J].Journal of Colloid and Interface Science,2005(1):133-138. |
| [10] | Shujun Zhang;Chonghua Yao;Xiaoxi Feng;Min Yang .Repeated use of MgNH_4PO_4-6H_2O residues for ammonium removal by acid dipping[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2004(1):27-32. |
| [11] | 王美荣,贾怀杰,郝茜.稀土厂氨氮废水的处理及资源化利用研究[J].稀土,2010(06):46-51. |
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