MnFe_(2)O_(4)颗粒非均相电芬顿处理柠檬酸镍配合物废水  

Treatment of nickel citrate complex wastewater by heterogeneous electro-Fenton with MnFe_(2)O_(4)particles

作　　者：贺框 胡小英 黄凯华 任艳玲 张明杨 杜建伟 温勇 王黎[2] HE Kuang;HU Xiaoying;HUANG Kaihua;REN Yanling;ZHANG Mingyang;DU Jianwei;WEN Yong;WANG Li(South China Institute of Environmental Sciences,Guangzhou 510655,China;Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]生态环境部华南环境科学研究所,广东广州510530 [2]武汉科技大学,湖北武汉430081

出　　处：《电镀与涂饰》2022年第23期1705-1711,共7页Electroplating & Finishing

基　　金：经济快速发展区场地优控污染源识别与风险管控(2018YFC1800306);生态环境部华南环境科学研究所生态环境修复技术研究中心青年创新基金项目(hx-201209-002)。

摘　　要：以MnFe_(2)O_(4)颗粒为催化剂、石墨为阳极、泡沫镍为阴极,构建了非均相电芬顿氧化体系,并研究了其对柠檬酸镍(Ni-Cit)配合物废水的处理效果。在电流密度为20 mA/cm^(2)、pH为3、催化剂投加量为0.6 g/L的条件下反应240 min,可去除废水中98%的Ni-Cit和92%的Ni。自由基掩蔽和中间产物检测结果表明,羟基自由基(•OH)在Ni-Cit的氧化过程中起主导作用,主要降解路径为:Ni-Cit首先被氧化为柠康酸并释放出Ni^(2+),柠康酸被进一步氧化为乙二酸、甲酸,最终被氧化为CO_(2)和H_(2)O。A heterogeneous electro-Fenton oxidation system was established with MnFe_(2)O_(4) particles as catalyst,graphite as anode,and foamed nickel as cathode,and then used to treat a wastewater containing nickel citrate complex(Ni-Cit).The removal efficiency was 98%for Ni-Cit and 92%for Ni under the following conditions:current density 20 mA/cm^(2),pH 3,catalyst dosage 0.6 g/L,and reaction time 240 min.The results of free radical masking experiment and intermediate product detection showed that hydroxyl radical(•OH)plays a dominant role during the oxidation of Ni-Cit.The main degradation route was determined as follows:firstly,Ni-Cit is oxidized to citraconic acid and Ni^(2+) is released;subsequently,citraconic acid is oxidized to oxalic acid and formic acid;and finally CO_(2) and H_(2)O are formed by further oxidation.

关 键 词：柠檬酸镍配合物 废水 电芬顿氧化 非均相反应 锰铁氧体 机理 

分 类 号：X781.1[环境科学与工程—环境工程]