镀镍废水Fenton氧化-铁氧体法处理研究  

Treatment of Electroplating Wastewater Containing Nickel by Fenton Oxidation-Ferrite Process

作　　者：罗琨[1] 庞娅[1] 李雪[1] 李荣喜[1] 雷敏[1] 杨珊[1] 车艳平 林嘉慧[1] 

机构地区：[1]长沙学院生物与环境工程系,湖南长沙410003

出　　处：《环境科学与技术》2017年第7期109-114,共6页Environmental Science & Technology

基　　金：国家自然科学基金(51409024);省教育厅教改项目(2013-223);长沙市科技计划项目

摘　　要：该文以含有机络合物的镀镍废水为研究对象,采用Fenton氧化法降解废水中的有机物,同时对有机络合物进行破络,使重金属离子释放出来,随后采用铁氧体法对废水作进一步处理。结果表明,Fenton氧化法能对含有机络合物的镀镍废水进行破络,降低废水中的有机物,在初始pH=4,H_2O_2初始浓度为13.32 g/L,[Fe^(2+)]/[H_2O_2](物质的量比)=0.4,反应时间为60 min时,COD去除率为75.15%,Ni^(2+)去除率为86.60%,Ni^(2+)达不到电镀废水排放标准;在铁氧体共沉淀条件:沉淀p H=11、Fe/Me(铁离子与金属离子物质的量比)=10、曝气接触时间为60 min时,Ni^(2+)去除率为99.64%,Ni^(2+)浓度为0.43 mg/L,达到《电镀污染物排放标准》(GB 21900-2008)。沉淀物分析证实了经铁氧体法处理后的沉淀中存在铁镍矿NiFe_2O_4,三维荧光光谱(EEM)分析表明蛋白质类物质和微生物产物经Fenton氧化后降解成小分子物质。Fenton oxidation was used to degrade organic matter in electroplating wastewater containing nickel, and break the complexation formed by heavy metal ions and complex agent, and then the ferrite coprecipitation method was used to treat the subsequent wastewater. Various factors during the process were studied. Results showed that Fenton oxidation could break the complexation formed by heavy metal ions and complex agent, greatly reduce organic matter in the wastewater. When the initial pH as 4, H2O2 concentration as 13.32 g/L, [Fe^2＋]/[H2O2] as 0.4, the reaction time as 60 man, COD and Ni^2＋ removal rate was respectively 75.15% and 86.60%, Ni^2＋ in the effluent could not meet the discharge standard. With precipitation in ferrite coprecipitation conditions as pH 11, Fe/Me 10, aeration contact time 60 min, the Ni^2＋ removal rate was 99.64%, and the concentration of Ni^2＋ in the effluent was 0.43 mg/L, which could meet the Electroplating Wastewater Discharge Standard （GB 21900-2008）. Precipitation analysis confirmed that the sediment obtained in the ferrite process was in the form of pentlandite （NiFe2O4）. Three dimensional fluorescence spectrum （EEM） showed that protein-like material and microbial products could be degraded into small molecular material after Fenton oxidation.

关 键 词：镀镍废水 FENTON氧化 铁氧体法 络合物 三维荧光光谱 

分 类 号：X703.1[环境科学与工程—环境工程]