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首页> 外文期刊>Journal of Hazardous Materials >Kinetics and energy efficiency for the degradation of 1,4-dioxane by electro-peroxone process
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Kinetics and energy efficiency for the degradation of 1,4-dioxane by electro-peroxone process

机译：电-过氧化物处理工艺降解1,4-二恶烷的动力学和能效

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摘要

Degradation of 1,4-dioxane by ozonation, electrolysis, and their combined electro-peroxone (E-peroxone) process was investigated. The E-peroxone process used a carbon-polytetrafluorethylene cathode to electrocatalytically convert O-2 in the sparged ozone generator effluent (O-2 and O-3 gas mixture) to H2O2. The electro-generated H2O2 then react with sparged O-3 to yield aqueous (OH)-O-center dot, which can in turn oxidize pollutants rapidly in the bulk solution. Using p-chlorobenzoic acid as (OH)-O-center dot probe, the pseudo-steady concentration of (OH)-O-center dot was determined to be similar to 0.744 x 10(-9) mM in the E-peroxone process, which is approximately 10 and 186 times of that in ozonation and electrolysis using a Pt anode. Thanks to its higher (OH)-O-center dot concentration, the E-peroxone process eliminated 96.6% total organic carbon (TOC) from a 1,4-dioxane solution after 2 h treatment with a specific energy consumption (SEC) of 0.376 kWh g(-1) TOCremoved. In comparison, ozonation and electrolysis using a boron-doped diamond anode removed only similar to 6.1% and 26.9% TOC with SEC of 2.43 and 0.558 kWh g(-1) TOCremoved, respectively. The results indicate that the E-peroxone process can significantly improve the kinetics and energy efficiency for 1,4-dioxane mineralization as compared to the two individual processes. The E-peroxone process may thus offer a highly effective and energy-efficient alternative to treat 1,4-dioxane wastewater. (C) 2015 Elsevier B.V. All rights reserved.
机译：研究了通过臭氧化，电解及其组合的过氧过氧化物（E-peroxone）工艺降解1,4-二恶烷。 E-peroxone工艺使用碳-聚四氟乙烯阴极将催化的臭氧发生器废气（O-2和O-3气体混合物）中的O-2电催化转化为H2O2。然后，电生成的H2O2与鼓泡的O-3反应，生成（OH）-O-中心水溶液，这又可以迅速氧化本体溶液中的污染物。使用对氯苯甲酸作为（OH）-O-中心点探针，确定（OH）-O-中心点的拟稳态浓度类似于E-过氧酮工艺中的0.744 x 10（-9）mM ，这大约是使用Pt阳极进行臭氧化和电解的10倍和186倍。由于其较高的（OH）-O-中心点浓度，E-过氧化物处理工艺经过2 h处理后，其比能量消耗（SEC）为0.376，从1,4-二恶烷溶液中消除了96.6％的总有机碳（TOC）。 kWh g（-1）TOC已移除。相比之下，使用掺杂硼的金刚石阳极进行的臭氧氧化和电解去除仅类似于6.1％和26.9％的TOC，SEC分别去除了2.43和0.558 kWh g（-1）TOC。结果表明，与两个单独的过程相比，E-过氧化物处理可以显着改善1,4-二恶烷矿化的动力学和能量效率。因此，E-peroxone工艺可以提供一种高效且节能的替代方法来处理1,4-二恶烷废水。 （C）2015 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of Hazardous Materials》 |2015年第30期|90-98|共9页
  • 作者

    Wang Huijiao; Bakheet Belal; Yuan Shi; Li Xiang; Yu Gang; Murayama Seiichi; Wang Yujue;

  • 作者单位

    Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;

    Toshiba Co Ltd, Power & Ind Syst R&D Ctr, Fuchu, Tokyo, Japan;

    Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Advanced oxidation; Electrocatalytic ozonation; Ozone; Hydrogen peroxide; Electrolysis;

    机译：高级氧化;电催化臭氧化;臭氧;过氧化氢;电解;

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