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Degradation and mineralization of furfural in aqueous solutions using heterogeneous catalytic ozonation

机译：非均相催化臭氧化降解糠醛在水溶液中的矿化作用

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摘要

The main aim of this experiment was to study the degradation of furfural in wastewater using catalytic ozonation process with granular activated carbon as a catalyst. Influences of the following parameters were investigated on furfural degradation; initial furfural concentration, solution pH, GAC dosage, and reaction time. In order to gain an understanding of the mechanism, involved these experiments were done in the presence of some radical scavengers. A significant synergistic effect between ozone and activated carbon was obtained in the oxidation and mineralization of furfural compared to single ozonation and adsorption on GAC processes, thus verifying the positive effect of coupling ozonation and GAC to degrade toxic compounds such as furfural. Furthermore, this study demonstrated that the efficiency of furfural removal increased with a decreasing size of AC particles due to an increased surface area. Measurements of COD in SOP and COP showed that more degradation and mineralization of furfural occurred in COP (80.2%) compared to single ozonation process (42.4%). Desorption studies were performed and they showed that percentages for recovery of furfural from GAC used in COP and single adsorption processes were 3.5 and 85.4, respectively.
机译：该实验的主要目的是研究使用颗粒状活性炭作为催化剂的催化臭氧氧化工艺对废水中糠醛的降解。研究了以下参数对糠醛降解的影响；初始糠醛浓度，溶液pH，GAC剂量和反应时间。为了获得对该机理的理解，在一些自由基清除剂的存在下进行了这些实验。与在GAC工艺中进行单次臭氧化和吸附相比，在糠醛的氧化和矿化中获得了臭氧与活性炭之间的显着协同作用，从而验证了臭氧化和GAC偶联对降解糠醛等有毒化合物的积极作用。此外，这项研究表明，糠醛去除效率随表面积的增加而随AC颗粒尺寸的减小而增加。对SOP和COP中COD的测量表明，与单次臭氧化过程（42.4％）相比，COP中糠醛的降解和矿化更多（80.2％）。进行了脱附研究，结果表明，用于COP和单一吸附过程的GAC中糠醛的回收率分别为3.5和85.4。

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  • 来源
    《Desalination and water treatment》 |2013年第36期|6789-6797|共9页
  • 作者

    M. Leili; G. Moussavi; K. Naddafi;

  • 作者单位

    Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, P.O.Box: 14115-331, Tehran, Iran;

    Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, P.O.Box: 14115-331, Tehran, Iran;

    Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Wastewater; Furfural; Catalytic ozonation process; Activated carbon;

    机译：废水;糠醛;催化臭氧化工艺;活性炭;

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