生态与农村环境学报 ›› 2020, Vol. 36 ›› Issue (6): 803-810.doi: 10.19741/j.issn.1673-4831.2019.0686

• 污染控制与修复 • 上一篇    下一篇

SA/GO@Fe3O4磁性粒子电极降解甲基橙废水的研究

张书陵1,2, 封金财1, 徐斌2, 张毅敏1,2, 杨飞2, 张志伟2   

  1. 1. 常州大学环境与安全工程学院, 江苏 常州 213164;
    2. 生态环境部南京环境科学研究所, 江苏 南京 210042
  • 收稿日期:2019-08-30 出版日期:2020-06-25 发布日期:2020-06-22
  • 通讯作者: 徐斌 E-mail:xubinnies@163.com
  • 作者简介:张书陵(1995-),男,江苏泰州人,硕士生,主要从事石墨烯电极材料以及电化学技术降解废水研究。E-mail:1914531980@qq.com
  • 基金资助:
    国家水体污染控制与治理科技重大专项(2017ZX07203-004);江苏省自然科学基金青年科学基金(BK20170111);国家自然科学基金青年科学基金(51808251);江苏省科协青年科技人才托举工程

Degradation of Methyl Orange Wastewater by SA/GO@Fe3O4 Magnetic Particle Electrode

ZHANG Shu-ling1,2, FENG Jin-cai1, XU Bin2, ZHANG Yi-min1,2, YANG Fei2, ZHANG Zhi-wei2   

  1. 1. College of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China;
    2. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
  • Received:2019-08-30 Online:2020-06-25 Published:2020-06-22

摘要: 该研究制备了SA/GO@Fe3O4磁性粒子电极,利用扫描电子显微镜、傅里叶红外变换光谱、X射线粉末衍射仪等手段研究了粒子电极的结构。选用甲基橙为目标污染物,考察初始pH、粒子电极投加量、电解时间和电流密度4个因素对甲基橙TOC去除率的影响。结果表明,4个因素影响由大到小依次为电流密度、电解时间、粒子电极投加量和初始pH。通过Box-Benhnken中心复合响应面设计评价实验效果,预测最佳反应条件为粒子电极投加量2.99 g·L-1、电流密度29.58 mA·cm-2,反应时间79.7 min、初始pH值4.31,此时甲基橙的总有机碳(TOC)去除率为80.03%。采用紫外可见吸收光谱、傅里叶变换红外光谱以及气相质谱联用对甲基橙降解过程产生的中间产物和机理进行了分析,推测了甲基橙的降解途径。粒子电极5 s可以快速磁分离,复用5次后降解率仅降低4.3%,具有优异的回收和复用性能。

关键词: 磁性粒子电极, 石墨烯, 甲基橙, 响应面法

Abstract: In this research, SA/GO@Fe3O4 magnetic particle electrode was prepared and the structure was characterized by means of scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray powder diffraction. Methyl orange was selected as the target pollutant. The influence of four factors, including initial pH, particle electrode dosage, electrolysis time and current density, on TOC removal efficiency were investigated. The order influence degrees of the factors were as follows: current density > electrolysis time > particle electrode dosage > initial pH. In addition, the experimental results were evaluated by Box-Benhnken central composite response surface design. The optimum reaction conditions were predicted as particle electrode dosage 2.99 g·L-1, current density 29.58 mA·cm-2, reaction time 79.7 min and initial pH 4.31. On this condition, the TOC removal efficiency of methyl orange was 80.03%. The intermediate products and mechanism of the degradation process of methyl orange were analyzed by UV-Vis absorption spectroscopy and Fourier transform infrared spectroscopy, and the degradation pathway was speculated. Besides, particle electrode could be rapidly separated by magnetic field in five seconds. Meanwhile, the degradation efficiency decreased by only 4.3% after five reuses, which proves that SA/GO@Fe3O4 magnetic particle electrode has excellent recovery and reuse performance.

Key words: magnetic particle electrode, graphene, methyl orange, response surface methodology

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