化工进展 ›› 2017, Vol. 36 ›› Issue (07): 2653-2659.DOI: 10.16085/j.issn.1000-6613.2016-2070

• 资源与环境化工 • 上一篇    下一篇

泡沫镍和泡沫铜阴极电类Fenton氧化降解对硝基酚的比较

汤茜1,2,3, 孙娟1, 任小蕾1, 杨春维1,3, 王栋2   

  1. 1 吉林师范大学环境科学与工程学院, 吉林 四平 136000;
    2 大连理工大学环境学院, 辽宁 大连 116024;
    3 吉林省高校环境材料与污染控制重点实验室, 吉林 四平 136000
  • 收稿日期:2016-11-11 修回日期:2017-01-31 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: 杨春维,副教授,研究方向为有机废水高级氧化处理。
  • 作者简介:汤茜(1980-),女,博士研究生,讲师,研究方面为有机废水高级氧化处理。E-mail:tangqian327@163.com。
  • 基金资助:
    吉林省科技厅重点科技攻关项目(20150204049SF)、吉林省教育厅“十二五”科学技术研究项目(2015225)、四平市科技发展计划(2015061)及工业生态与环境工程教育部重点实验室开放基金项目(KLIEEE-13-07)。

Comparative study on the electro-Fenton-like oxidation of p-nitrophenol with nickel and copper foam cathodes

TANG Qian1,2,3, SUN Juan1, REN Xiaolei1, YANG Chunwei1,3, WANG Dong2   

  1. 1 College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, Jilin, China;
    2 School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China;
    3 Key Laboratory of Environmental Materials and Pollution Control, the Education Department of Jilin Province, Siping 136000, Jilin, China
  • Received:2016-11-11 Revised:2017-01-31 Online:2017-07-05 Published:2017-07-05

摘要: 选用两种常见的泡沫金属材料——泡沫镍(NF)和泡沫铜(CF)作为电类Fenton氧化体系的阴极,分别从电极的形貌、结构、电类Fenton氧化降解对硝基酚(p-NP)和稳定性能等方面进行了比较分析。结果表明,NF和CF均为三维多孔网络结构,CF电极表面有少量铜氧化物颗粒沉积;NF和CF阴极均能催化O2原位两电子还原产H2O2,当阴极电位为-0.9V,180min时H2O2的累积质量浓度达最大值,分别为64.2mg/L和56.5mg/L,电流效率分别为14.1%和14.3%;NF和CF阴极可拓宽电类Fenton氧化法的pH适用范围,在不调节电解液初始pH条件下p-NP均有较好的降解效果,当阴极电位为-0.9V,180min时p-NP去除率分别为72.9%和80.7%,反应过程均符合一级动力学模型,CF电极体系p-NP的降解速率高于其在NF电极体系中的降解速率;NF电极相对CF电极的稳定性较好,重复使用8次后,p-NP去除率和电极形貌均没有明显变化,但仍有少量的镍离子 溶出。

关键词: 泡沫金属, 电类Fenton, 降解, 动力学, 稳定性

Abstract: Two common metal foams,nickel foam (NF) and copper foam (CF) were prepared as the cathodes in electro-Fenton-like system.The morphology,structure,electro-Fenton-like oxidation of p-nitrophenol (p-NP) and electrode stability were compared.Results indicated that the NF and CF cathodes both had three-dimensional net structure,and there were some copper oxide particles on the CF surface.The NF and CF cathodes both could catalyze O2 to produce H2O2 via two electrons reduction,and the yield of H2O2 were reached the maximum of 64.2mg/L and 56.5mg/L,respectively at 180min under the cathodic potential -0.9V,and the current efficiency were 14.1% and 14.3%.As pH range of application was broadened with the NF and CF cathodes in the electro-Fenton-like oxidation of p-NP,the p-NP removal efficiency were both high even if the initial pH of solution was not regulated.They were 72.9% and 80.7% at 180min under the cathodic potential -0.9V,respectively.The kinetic studies showed that the degradation of p-NP with NF and CF cathodes both followed pseudo first-order kinetics.The corresponding apparent rate constants with CF cathode were higher than that with NF cathode.The reusability of NF cathode was better than CF cathode because the removal efficiency of p-NP and the morphology of the cathode were not changed obviously after eight cycles,but a little nickel ion was found in the solution.

Key words: metal foam, electro-Fenton-like oxidation, degradation, kinetics, stability

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