Using oxygen/ozone nanobubbles for in situ oxidation of dissolved hydrogen sulfide at a residential tunnel-construction site

Maie, Nagamitsu; Anzai, Satoshi; Tokai, Kengo; Kakino, Wataru; Taruya, Hiroyuki; Ninomiya, H.

doi:10.1016/j.jenvman.2021.114068

Cited by 9 publications

(3 citation statements)

References 33 publications

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“…For example, Maie et al used high-density oxygen/ozone NBs generated by the ultra-fine pore method for in situ oxidative degradation of water contaminated with high concentrations (120 mg/L) of H 2 S at a residential tunnel construction site, achieving the desired goal of efficient and safe elimination of this hazardous source. 17 into the photodegradation reaction system of oxytetracycline could significantly enhance its degradation, and the oxygen NB-mediated photodegradation of oxytetracycline was up to 98% under optimal conditions. 18 Applying the oxygen NB technique to investigate the removal efficiency of geosmin and 2-methylisoborneol in contaminated water and their removal mechanisms, Soyluoglu and coworkers found that exogenous reactive oxygen species generated by oxygen NBs could provide additional removal rates of up to 15%.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In recent years, there have been an increasing number of studies on the use of oxygen NBs as a novel advanced oxidation process to enhance the oxidation effect. For example, Maie et al used high-density oxygen/ozone NBs generated by the ultra-fine pore method for in situ oxidative degradation of water contaminated with high concentrations (120 mg/L) of H 2 S at a residential tunnel construction site, achieving the desired goal of efficient and safe elimination of this hazardous source . Wang et al found that introduction of oxygen NBs into the photodegradation reaction system of oxytetracycline could significantly enhance its degradation, and the oxygen NB-mediated photodegradation of oxytetracycline was up to 98% under optimal conditions .…”

Section: Introductionmentioning

confidence: 99%

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Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Cui

Sun

et al. 2023

Langmuir

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Nanobubble (NB) technology has demonstrated the potential to enhance or substitute for current treatment processes in various areas. However, research employing it as a novel advanced oxidation process has thus far been relatively limited. Herein, we focused on the oxidative capacity of oxygen NBs and investigated the feasibility of utilizing their enhanced oxidation of ferrous ions (Fe 2+ ) in a sulfuric acid medium when using copper as a catalyst and their effect mechanism. It was demonstrated that oxygen NBs could collapse to produce hydroxyl radicals (•OH) in the absence of dynamic stimuli using electron spin resonance spectroscopy, and methylene blue was used as a molecular probe for •OH to illustrate that NB stability, determined by their properties, is the critical factor affecting •OH release. In subsequent Fe 2+ oxidation experiments, it was discovered that both strong acidity and copper ions (Cu 2+ ) contribute to accelerating the collapse of NBs to produce •OH. While •OH derived from the collapse of NBs acts on Fe 2+ , the molecular oxygen generated homologously with •OH will further activate the catalytic oxidation of Fe 2+ by interacting with Cu 2+ . With the synergistic effect of the above two oxidationdriven mechanisms, the oxidation rate of Fe 2+ can be significantly increased up to 88% due to the exceptional properties of oxygen NBs, which facilitate the formation of an atmosphere with persistent oxygen supersaturation and the generation of oxidation radicals. This study provides significant insight into applying NBs as a prospective technology for enhanced oxidation processes.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxidative Capacity of Oxygen Nanobubbles and Their Mechanism for the Catalytic Oxidation of Ferrous Ions with Copper as a Catalyst in Sulfuric Acid Medium

Cui

Sun

et al. 2023

Langmuir

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“…Only 21 papers presented data on ozone NBs (i.e., size (<1000 nm) or concentration). Of these 21 papers, eight measured NBs concentration in the solution. ,,,− However, these studies did not report the background particle levels, potentially overestimating the actual NBs concentration. Only six studies measured and reported the surface charge of ozone NBs. ,,,− Notably, none of the reviewed studies investigated the concentration change over time or the long-term stability of the ozone NBs.…”

Section: Introductionmentioning

confidence: 99%