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Efficacy and Mechanism of Organic Contaminants Degradation by Bubbles at High-Temperature Gas–Liquid Interface.

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Title: Efficacy and Mechanism of Organic Contaminants Degradation by Bubbles at High-Temperature Gas–Liquid Interface.
Authors: Dong, Mingze1,2 (AUTHOR), Huang, Bochuang1 (AUTHOR), Li, Fuqiang1,3 (AUTHOR), Zeng, Xiancan1 (AUTHOR), Fang, Wei1 (AUTHOR), Chen, Jianyu1 (AUTHOR), Luo, Qijin1 (AUTHOR), Li, Siyang1 (AUTHOR) lisiyangemail@163.com
Source: Water, Air & Soil Pollution. Jun2026, Vol. 237 Issue 12, p1-14. 14p.
Subject Terms: *Gas-liquid interfaces, *Bubble column reactors, *Oxidation, *Wastewater treatment, *Reactive oxygen species, *Organic compounds removal (Sewage purification)
Abstract: Wet air oxidation (WAO) can achieve high removal efficiencies for organic pollutants in wastewater, but it is energy intensive because high temperatures and pressures must be maintained. The high specific heat capacity of wastewater and the pressure required to raise its temperature are key factors limiting the broad deployment of WAO. Here we propose an energy-saving WAO process that exploits the fact that air can be heated to high temperatures without pressure constraints. In this process, hot air is bubbled through wastewater, and organic pollutants are degraded at the high-temperature water film formed on the bubble surface in a Hot Air Bubble Reactor (HABR). HABR removed 80.7% of methylene blue at an inlet temperature of 300 °C with a bubble diameter of 95–135 µm, pH 3, and an inlet gas flow rate of 7 L min−1. Scavenger tests and electron spin resonance measurements indicate that the reactive oxygen species generated during contact oxidation at the bubble-surface water film include ·OH, ·O2-, and 1O2, with ·OH as the dominant species. Under optimized conditions, HABR achieved degradation efficiencies of 83.2%, 75.7%, 60.4%, 63.4%, and 41.5% for methyl orange, ciprofloxacin, thiamethoxam, sulfamethoxazole, and aniline, respectively, within 60 min. Overall, HABR enables efficient removal of a range of organic pollutants under less stringent operating conditions than conventional WAO, highlighting its potential for practical wastewater treatment. Highlights: An energy-efficient wet air oxidation method was developed. A hot gas–liquid interface was used for the first time to degrade organic pollutants. The reactive oxygen species generated at the hot gas–liquid interface include ·OH, ·O2-, and 1O2. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 193390186
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Efficacy and Mechanism of Organic Contaminants Degradation by Bubbles at High-Temperature Gas–Liquid Interface.
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  Data: <searchLink fieldCode="AR" term="%22Dong%2C+Mingze%22">Dong, Mingze</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Bochuang%22">Huang, Bochuang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Fuqiang%22">Li, Fuqiang</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zeng%2C+Xiancan%22">Zeng, Xiancan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fang%2C+Wei%22">Fang, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Jianyu%22">Chen, Jianyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luo%2C+Qijin%22">Luo, Qijin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Siyang%22">Li, Siyang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lisiyangemail@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Water%2C+Air+%26+Soil+Pollution%22">Water, Air & Soil Pollution</searchLink>. Jun2026, Vol. 237 Issue 12, p1-14. 14p.
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  Data: *<searchLink fieldCode="DE" term="%22Gas-liquid+interfaces%22">Gas-liquid interfaces</searchLink><br />*<searchLink fieldCode="DE" term="%22Bubble+column+reactors%22">Bubble column reactors</searchLink><br />*<searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br />*<searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink><br />*<searchLink fieldCode="DE" term="%22Reactive+oxygen+species%22">Reactive oxygen species</searchLink><br />*<searchLink fieldCode="DE" term="%22Organic+compounds+removal+%28Sewage+purification%29%22">Organic compounds removal (Sewage purification)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Wet air oxidation (WAO) can achieve high removal efficiencies for organic pollutants in wastewater, but it is energy intensive because high temperatures and pressures must be maintained. The high specific heat capacity of wastewater and the pressure required to raise its temperature are key factors limiting the broad deployment of WAO. Here we propose an energy-saving WAO process that exploits the fact that air can be heated to high temperatures without pressure constraints. In this process, hot air is bubbled through wastewater, and organic pollutants are degraded at the high-temperature water film formed on the bubble surface in a Hot Air Bubble Reactor (HABR). HABR removed 80.7% of methylene blue at an inlet temperature of 300 °C with a bubble diameter of 95–135 µm, pH 3, and an inlet gas flow rate of 7 L min−1. Scavenger tests and electron spin resonance measurements indicate that the reactive oxygen species generated during contact oxidation at the bubble-surface water film include ·OH, ·O2-, and 1O2, with ·OH as the dominant species. Under optimized conditions, HABR achieved degradation efficiencies of 83.2%, 75.7%, 60.4%, 63.4%, and 41.5% for methyl orange, ciprofloxacin, thiamethoxam, sulfamethoxazole, and aniline, respectively, within 60 min. Overall, HABR enables efficient removal of a range of organic pollutants under less stringent operating conditions than conventional WAO, highlighting its potential for practical wastewater treatment. Highlights: An energy-efficient wet air oxidation method was developed. A hot gas–liquid interface was used for the first time to degrade organic pollutants. The reactive oxygen species generated at the hot gas–liquid interface include ·OH, ·O2-, and 1O2. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=193390186
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1007/s11270-026-09410-7
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 1
    Subjects:
      – SubjectFull: Gas-liquid interfaces
        Type: general
      – SubjectFull: Bubble column reactors
        Type: general
      – SubjectFull: Oxidation
        Type: general
      – SubjectFull: Wastewater treatment
        Type: general
      – SubjectFull: Reactive oxygen species
        Type: general
      – SubjectFull: Organic compounds removal (Sewage purification)
        Type: general
    Titles:
      – TitleFull: Efficacy and Mechanism of Organic Contaminants Degradation by Bubbles at High-Temperature Gas–Liquid Interface.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Dong, Mingze
      – PersonEntity:
          Name:
            NameFull: Huang, Bochuang
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            NameFull: Li, Fuqiang
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            NameFull: Zeng, Xiancan
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            NameFull: Fang, Wei
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            NameFull: Chen, Jianyu
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            NameFull: Luo, Qijin
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            NameFull: Li, Siyang
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            – D: 15
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00496979
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            – Type: volume
              Value: 237
            – Type: issue
              Value: 12
          Titles:
            – TitleFull: Water, Air & Soil Pollution
              Type: main
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