陶瓷基PbO_(2)电极的制备及其处理Ni-EDTA络合废水  

Preparation of a ceramic-based lead dioxide electrode and its application in treatment of Ni-EDTA complex wastewater

作　　者：徐小凤 卓琼芳 陈中颖 任秀文 刘静静 邱永福 李衍亮 谢水波 Xu Xiaofeng;Zhuo Qiongfang;Chen Zhongying;Ren Xiuwen;Liu Jingjing;Qiu Yongfu;Li Yanliang;Xie Shuibo(School of Civil Engineering,University of South China,Hengyang 421001,China;School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China;South China Institute of Environmental Sciences,MEE,Guangzhou 510655,China)

机构地区：[1]南华大学土木工程学院,湖南衡阳421001 [2]东莞理工学院生态环境与建筑工程学院,广东东莞523808 [3]生态环境部华南环境科学研究所,广东广州510655

出　　处：《工业水处理》2021年第9期60-68,共9页Industrial Water Treatment

基　　金：“水体污染控制与治理”国家重大科技专项(2017ZX07202-001-007);国家自然科学基金项目(21777106);广东省公益研究与能力建设(2017A020216014);广东省应用型专项(2016B020240007,2015B020235004)

摘　　要：采用化学沉积-电沉积法的方法制备了陶瓷/α-PbO_(2)、陶瓷/α-PbO_(2)/β-PbO_(2)、陶瓷/α-PbO_(2)/β-PbO_(2)-PTFE电极,采用扫描电子显微镜(SEM)、X-射线衍射(XRD)、线性扫描伏安(LSV)和电极加速寿命等方法对电极进行表征及化学性能测试。分别以这3种电极作为阳极,电化学氧化Ni-EDTA,同时阴极电沉积回收镍。实验结果表明,陶瓷/α-PbO_(2)/β-PbO_(2)-PTFE比其他2种电极具有更高的电氧化破络能力,在Ni-EDTA初始质量浓度为100 mg/L、电流密度为30 mA/cm^(2),pH=3.1下电氧化180 min后,Ni-EDTA去除率可达96.2%,阴极镍元素回收率达17.9%。The ceramic/α-PbO_(2),ceramic/α-PbO_(2)/β-PbO_(2),and ceramic/α-PbO_(2)/β-PbO_(2)-PTFE were prepared by chemical deposition-electrodeposition methods and characterized by scanning electron microscopy(SEM),X-ray di-ffraction(XRD),linear sweep voltammetry(LSV)and accelerated lifetime tests.The simultaneous decomplexation of Ni-EDTA and electrodeposition recovery of nickel metal were attempted in a combined electrooxidation-electrode-position reactor with these three PbO_(2) electrodes and polished titanium cathode.The results showed that the ceramic/α-PbO_(2)/β-PbO_(2)-PTFE electrode had a higher oxidation breaking ability than the other two electrodes.The removal efficiencies of Ni-EDTA and the recovery ratios Ni element were determined to be 96.2%and over 17.9%respecti-vely under the conditions of current density 30 mA/cm^(2),pH 3.10,initial Ni-EDTA mass concentration 100 mg/L,and reaction time 180 min.

关 键 词：电氧化 Ni-EDTA 陶瓷基PbO_(2)电极 镍回收 

分 类 号：X703.1[环境科学与工程—环境工程]