Fenton氧化-混凝沉淀处理电镀废水中重金属镍的研究  

Treatment of Heavy Metal Nickel in Electroplating Wastewater with Fenton Oxidation and Coagulation Precipitation

作　　者：蔡文良[1] 谢艳云[1] CAI Wen-liang;XIE Yan-yun(Chongqing Water Resources and Electric Engineering College,Chongqing 402160,China)

机构地区：[1]重庆水利电力职业技术学院,重庆402160

出　　处：《矿冶工程》2020年第4期106-109,共4页Mining and Metallurgical Engineering

基　　金：重庆市教委科学技术项目(KJ1735448);重庆市教委科学技术研究项目(KJQN201803801);重庆市教委科学技术项目(KJQN201803811);重庆水利电力职业技术学院人才引进基金项目(KRC201404)。

摘　　要：以某电镀厂含镍废水为处理对象,探究Fenton氧化-混凝沉淀工艺对重金属镍的去除效果。结果表明,Fenton氧化的最佳条件为:H2O2投加量2 mmoL/L、FeSO4/H2O2摩尔比0.6、初始pH值5、反应时间80 min;混凝沉淀的最佳条件为:pH值9、PAC用量12 mg/L、混凝时间12 min、助凝剂用量6 mg/L、沉降时间60 min;在此最佳条件下,Fenton氧化-混凝沉淀工艺处理含镍电镀废水,镍去除率可达99.8%,出水总镍含量低至0.029 mg/L,处理后的出水水质满足《电镀污染物排放标准》(GB21900—2008)表Ⅲ要求。The nickel-containing wastewater of an electroplating plant was treated in an experiment by adopting Fenton oxidation and coagulation precipitation process,for studying the removal effect of heavy metal nickel.The results show that under the following optimum conditions,the Fenton oxidation with H2O2 dosage of 2 mmoL/L,FeSO4/H2O2 molar ratio of 0.6,an initial pH of 5,the reaction time of 80 min,followed by the coagulation and precipitation process with pH of 9,PAC dosage of 12 mg/L,reaction time of 12 min,coagulant dosage of 6 mg/L and settling time of 60 min,can lead to the nickel removal rate up to 99.8%and the total nickel content in the effluent as low as 0.029 mg/L.It is shown that the quality of the effluent after the treatment has met the requirements stated in TableⅢof Electroplating Pollutant Discharge Standard(GB21900—2008).

关 键 词：废水处理 电镀废水 镍 FENTON氧化 混凝沉淀 助凝剂 

分 类 号：X703[环境科学与工程—环境工程]