摘要
为了开发高效铁盐除磷药剂,以FeCl_3·6H_2O、Fe_2(SO_4)_3、FeSO_4·7H_2O和含铁聚合氯化铝(PAC)处理PO_4^(3-)–P质量浓度为12.4 mg/L的原水,分别考察了最优投量,并探索了混合各铁盐配置高效复混除磷剂的可行性.结果表明,离子型铁盐和絮凝型铁盐的除磷机理不同.在原水浊度较低的情况下,离子型铁盐通过结晶沉淀方式除磷的效率更高,且Fe^(2+)比Fe^(3+)具有更高的沉淀效率.FeCl_3·6H_2O、Fe_2(SO_4)_3、FeSO_4·7H_2O和含铁PAC的最优投量分别为108.2、80.0、166.8和25 mg/L.通过混合各类型铁盐配制复混药剂,可以发挥结晶沉淀、络合混凝等多重除磷作用,从而提高除磷效率.
In order to explore efficient ferric salt phosphorus removal agent,FeCl_3·6H_2O,Fe_2（SO_4）_3,FeSO_4·7H_2O and ferric contained polymeric aluminium compound（ PAC）were used to treat raw water with 12. 4 mg/L PO_4^（3-）– P concentration. Optimal dosage was investigated,and the feasibility of mixing each ferric salt to make efficient compound phosphorus removal agent was explored. The results show that ionic type and flocculation type ferric salt owned different phosphorus removal mechanisms. Under low turbidity raw water condition,ionic type ferric salt could achieve higher phosphorus removal efficiency through crystal precipitation way,and Fe^（2＋） presented higher precipitation efficiency than Fe^（3＋）. The optimal dosages of FeCl_3·6 H_2O,Fe_2（SO_4）_3,FeSO_4·7H_2O and PAC were 108. 2,80. 0,166. 8 and 25 mg/L,respectively. Through mixing each ferric salt to make compound agent,multiple phosphorus removal ways such as crystal precipitation and complexing coagulation could take effect,and increase the phosphorus removal efficiency.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2017年第6期667-670,共4页
Journal of Harbin University of Commerce：Natural Sciences Edition
基金
高等学校重点科研项目(17A560029)
富营养化水体缓释除磷研究项目(2016xjxm170)
关键词
铁盐
复混除磷剂
结晶沉淀
络合混凝
ferric salt
compound phosphorus removal agent
crystal precipitation
comple-xing coagulation
