镀镍废水Fenton氧化-铁氧体法处理研究

发布时间：2018-07-18 21:47

【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。
[Abstract]:In this paper, the nickel plating wastewater containing organic complex was used as the research object, the organic compound was decomposed by Fenton oxidation method, and the organic complex was broken down to release heavy metal ions. Then the ferrite process was used to further treat the wastewater. The results show that Fenton oxidation method can break down the nickel plating wastewater containing organic complex and reduce the organic matter in the wastewater. At the initial pH of 4g / L, [Fe ~ (2)] / [H _ 2O _ 2] (mass ratio) 0.4and reaction time of 60 min, the removal rate of COD is 75.15g / L, and the removal rate of Ni2 is 86.60g / L, which is not up to the discharge standard of electroplating wastewater. The ferrite coprecipitation conditions are as follows: precipitation (Fe ~ (11) / Fe / me) = 10, aeration contact time is 60 min, the removal rate of Ni ~ (2) is 99.64 mg / L, and the concentration is 0.43 mg / L, which is up to the "discharge Standard of Electroplating pollutants" (GB21900-2008). The precipitation analysis confirmed the existence of nife _ 2O _ 4 in the precipitate treated by ferrite method. Three-dimensional fluorescence spectroscopy (EEM) analysis showed that the protein and microbial products were oxidized by Fenton and then degraded into small molecules.
【作者单位】：长沙学院生物与环境工程系;
【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
【分类号】：X781.1

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