复合磁种混凝与磁混凝处理黑臭水体效能比较  

Comparison of Treatment Efficiency of Composite Magnetic Seed Coagulation and Magnetic Coagulation on Black and Odorous Water

作　　者：李璇 刘武平 周琼 方华[3] 杨顺 赵金宇 LI Xuan;LIU Wu‑ping;ZHOU Qiong;FANG Hua;YANG Shun;ZHAO Jin‑yu(Jiangsu Environmental Engineering Technology Co.Ltd.,Nanjing 210019,China;Southwest Municipal Engineering Design&Research Institute of China,Chengdu 610081,China;School of Environmental Science&Engineering,Nanjing University of InformationScience&Technology,Nanjing 210044,China)

机构地区：[1]江苏省环境工程技术有限公司,江苏南京210019 [2]中国市政工程西南设计研究总院有限公司,四川成都610081 [3]南京信息工程大学环境科学与工程学院,江苏南京210044

出　　处：《中国给水排水》2024年第7期13-18,共6页China Water & Wastewater

基　　金：江苏省自然科学基金资助面上项目(BK20221564);江苏省环保集团科研项目(1001)。

摘　　要：在制备和表征纳米Fe_(3)O_(4)-沸石复合磁种的基础上,系统比较了混凝、磁混凝和复合磁种混凝三种工艺对黑臭水体的处理效能。结果表明,复合磁种中铁元素含量约为20.0%,沸石的骨架结构和成分未被改变。聚合氯化铝(PAC)和磁种投加量分别为60 mg/L和1~2 g/L时,磁混凝和复合磁种混凝可获得较优的黑臭水体处理效果。磁混凝可强化混凝效果,提高对浊度、TP和COD的去除率,但无法有效去除氨氮;复合磁种混凝可有效去除水中氨氮,全面提升出水水质。黑臭水体中的污染物主要以溶解态形式存在,混凝和磁混凝不能有效去除溶解性污染物,因此对氨氮和COD的去除效果较差;但可通过化学除磷获得较高的TP去除率。复合磁种混凝可利用沸石的离子交换和吸附作用强化对溶解性污染物的去除,获得较好的氨氮和COD去除效果;同时,还可利用负载的纳米Fe3O4实现极限除磷。Based on preparation and characterization of nano‑Fe_(3)O_(4) and zeolite composite magnetic seed,the treatment efficiency of coagulation,magnetic coagulation and composite magnetic seed coagulation on black and odorous water was compared.The results showed that the content of iron in the composite magnetic seed was about 20.0%,and the skeleton structure and composition of zeolite were not changed.When PAC dosage was 60 mg/L and magnetic seed dosage was 1-2 g/L,magnetic coagulation and composite magnetic seed coagulation could obtain optimal removal effects on black and odorous water.Magnetic coagulation enhanced the coagulation effect and increased the removal rate of turbidity,TP and COD,but could not effectively remove ammonia nitrogen.The composite magnetic seed coagulation effectively removed ammonia nitrogen in water and comprehensively improved effluent quality.The pollutants in black and odorous water mainly existed in the form of dissolved state,and coagulation and magnetic coagulation could not effectively remove dissolved pollutants,so the removal effects of ammonia nitrogen and COD were poor.However,higher TP removal rate was obtained through chemical phosphorus removal.Composite magnetic seed coagulation could strengthen the removal of dissolved pollutants by ion exchange and adsorption of zeolite,and obtained better ammonia nitrogen and COD removal.Moreover,composite magnetic seed coagulation achieved complete phosphorus removal by loaded nano‑Fe3O4.

关 键 词：磁混凝 复合磁种 沸石 纳米FE3O4 黑臭水体 

分 类 号：TU992[建筑科学—市政工程]