化学沉淀-芬顿法处理高浓度柠檬酸镍络合废水研究  

Study on Treatment of High Concentration Nickel Citrate Complex Wastewater by Chemical Precipitation-Fenton Process

作　　者：李庄 谢岸辉 董才渊 毛晓茜 朱日龙[3] Li Zhuang;Xie Anhui;Dong Caiyuan;Mao Xiaoqian;Zhu Rilong(Hunan Provincial Center for Ecological and Environmental Affairs, Changsha 410019, China;Hunan Industrial Communication Energy-saving Monitoring Center, Changsha 410004, China;Hunan University, Changsha 410082, China)

机构地区：[1]湖南省生态环境事务中心,湖南长沙410019 [2]湖南省工业通信业节能监察中心,湖南长沙410004 [3]湖南大学,湖南长沙410082

出　　处：《环境科学与管理》2022年第7期109-112,共4页Environmental Science and Management

基　　金：中央高校基本科研业务费(531118010314);湖湘高层次人才聚集工程-创新团队(2021RC5030);湖南创新型省份建设郴州国家可持续发展议程创新示范区专项(2021sfq26)。

摘　　要：针对高浓度柠檬酸镍络合物电镀废水难处理的问题,通过引入氧化钙破络,去除绝大部分的柠檬酸根,再使用芬顿试剂去除剩余的柠檬酸根,将废水中络合态镍转化成离子态镍去除,开发出高效的化学沉淀-芬顿法工艺。数据表明,当氧化钙加量为0.625 g/g(柠檬酸)时去除柠檬酸根效果较好,去除率达到82%,最佳n(Fe^(2+))n(H_(2)O_(2))为0.0918,每50 mL加氧化钙沉淀后上清液投加1 g FeSO_(4)·7H_(2)O和1 mL/g(柠檬酸)30%双氧水作为最优投加量,最佳沉淀pH值为11~12,最佳初始pH值为3.0~4.0。所采用的工艺处理方法简单有效,处理后的废液中,镍离子浓度达到电镀行业废水排放标准。In order to solve the problem of electroplating wastewater containing high concentration of nickel citrate complex,calcium oxide was introduced to remove most of the citrate.Fenton reagent was used to remove the remaining citrate,and the complex nickel in the wastewater was converted into ionic nickel to be removed.The influence of each reagent was investigated,and an efficient chemical precipitation-Fenton process was developed.The experimental results show that the optimal dosage of calcium oxide is 0.625 g/g(citric acid).The removal rate of citric acid is 82%,and the optimal molar ratio of Fe^(2+) to H_(2)O_(2) is 0.0918.1 g FeSO_(4)·7H_(2)O and 1 mL/g(citric acid)30%hydrogen peroxide were added to the supernatant of 50 mL CaO precipitation.The optimal pH value of precipitation was 11~12 and the optimal initial pH value was 3.0~4.0.The adopted process treatment method is simple and effective,and the concentration of the nickel ions in the treated waste liquid reaches the wastewater discharge standard of the electroplating industry.

关 键 词：化学沉淀 芬顿 高浓度 柠檬酸镍络合物 氧化钙 

分 类 号：X703.1[环境科学与工程—环境工程]