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首页> 外文期刊>Environmental Science & Technology >VUV/UV/Chlorine as an Enhanced Advanced Oxidation Process for Organic Pollutant Removal from Water: Assessment with a Novel Mini-Fluidic VUV/UV Photoreaction System (MVPS)
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VUV/UV/Chlorine as an Enhanced Advanced Oxidation Process for Organic Pollutant Removal from Water: Assessment with a Novel Mini-Fluidic VUV/UV Photoreaction System (MVPS)

机译：VUV / UV /氯作为增强的高级氧化工艺，用于去除水中的有机污染物：新型微型流体VUV / UV光反应系统（MVPS）的评估

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摘要

Vacuum ultraviolet (VUV) and ultraviolet (UV)/chlorine processes are regarded as two of many advanced oxidation processes (AOPs). Because of the similar cost of VUV/UV and UV lamps, a combination of VUV and UV/chlorine (i.e., VUV/UV/chlorine) may enhance the removal of organic pollutants in water but without any additional power input In this paper, a mini- fluidic VUV/UV photoreaction system (MVPS) was developed for bench-scale experiments, which could emit both VUV (18S run) and UV (254 nm) or solely UV beams with a nearly identical UV photon fluence. The photon fluence rates of UV and VUV output by the MVPS were determined to be 8.88 × 10~(-4) and 4.93 × 10~(-5) einstein m~(-2) s~(-1), respectively. The VUV/UV/chlorine process exhibited a strong enhancement concerning the degradation of methylene blue (MB, a model organic pollutant) as compared to the total performance of the VUV/UV and UV/chlorine processes, although the photon fluence of the VUV only accounted for 5.6% of that of the UV. An acidic pH favored MB degradation by the VUV/ UV/chlorine process. The synergistic mechanism of the VUV/UV/chlorine process was mainly ascribed to the effective use of ~·OH for pollutant removal through formation of longer-lived secondary radicals (e.g., ~·OCl). This study demonstrates that the new VUV/UV/chlorine process, as an enhanced AOP, can be applied as a highly effective and energy-saving technology for small-scale water and wastewater treatment.
机译：真空紫外线（VUV）和紫外线（UV）/氯工艺被视为许多高级氧化工艺（AOP）中的两种。由于VUV / UV和UV灯的成本相近，因此将VUV和UV /氯（即VUV / UV /氯）组合使用可以提高水中有机污染物的去除率，但无需额外输入功率。微型流体VUV / UV光反应系统（MVPS）是为实验室规模的实验开发的，它可以发射VUV（18S运行）和UV（254 nm），或者仅发出具有几乎相同的UV光子通量的UV光束。 MVPS输出的UV和VUV的光子注量速率分别确定为8.88×10〜（-4）和4.93×10〜（-5）爱因斯坦m〜（-2）s〜（-1）。与VUV / UV和UV /氯工艺的总性能相比，VUV / UV /氯工艺相对于亚甲基蓝（MB，一种典型的有机污染物）的降解表现出了极大的增强，尽管仅VUV的光子通量占紫外线的5.6％。酸性pH值有助于通过VUV / UV /氯气工艺降解MB。 VUV / UV /氯过程的协同机理主要归因于〜·OH通过形成更长寿命的次级自由基（例如〜·OCl）有效地去除污染物。这项研究表明，作为增强型AOP的新型VUV / UV /氯工艺可作为一种高效节能技术用于小规模水和废水处理。

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  • 来源
    《Environmental Science & Technology》 |2016年第11期|5849-5856|共8页
  • 作者

    Mengkai Li; Zhimin Qiang; Pin Hou; James R. Bolton; Jiuhui Qu; Peng Li; Chen Wang;

  • 作者单位

    Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China,University of Chinese Academy of Sciences, 19 Yu-quan Road, Beijing 100049, China;

    Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China,University of Chinese Academy of Sciences, 19 Yu-quan Road, Beijing 100049, China;

    School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China;

    Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 2W2, Canada;

    Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China,University of Chinese Academy of Sciences, 19 Yu-quan Road, Beijing 100049, China;

    School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China;

    Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China,University of Chinese Academy of Sciences, 19 Yu-quan Road, Beijing 100049, 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);
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