Using oxygen/ozone nanobubbles for in situ oxidation of dissolved hydrogen sulfide at a residential tunnel-construction site
| Autor: | Hiroyuki Taruya, Wataru Kakino, Nagamitsu Maie, Kengo Tokai, Satoshi Anzai, Hideki Ninomiya |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Ozone Sulfide Sewage business.industry Hydrogen sulfide chemistry.chemical_element General Medicine Management Monitoring Policy and Law Oxygen Industrial wastewater treatment chemistry.chemical_compound chemistry Environmental chemistry Environmental science Sewage treatment Water treatment Hydrogen Sulfide business Waste Management and Disposal Oxidation-Reduction |
| Zdroj: | Journal of environmental management. 302 |
| ISSN: | 1095-8630 |
| Popis: | Hydrogen sulfide (H2S) is a toxic gas, and considerable research has been conducted for its control and removal from industrial wastewater and sewage water. However, no simple and practical technology is available for degrading H2S in situ at tunnel constructing sites. On May 11, 2020, an H2S blowout accident occurred in underground soil at a residential sewer-tunnel construction site in Iwakuni City, Yamaguchi Prefecture, Japan, filling the tunnel with high concentrations of H2S gas, causing the fatality of one worker owing to emphysema. River water flowing near the site was immediately introduced into the tunnel to trap the H2S gas, generating 652-m3 water that contained high concentrations (120 mg/L) of dissolved H2S in the tunnel. To safely and quickly remove H2S in situ, the contaminated water was treated with high-density oxygen and ozone nanobubbles (O2/O3-HDNBs) generated using the ultrafine pore method. Consequently, H2S was removed from the contaminated water in 3 days. This is the first successful application of O2/O3-HDNB technology for the in situ oxidation of H2S in environmental water at a construction site. This study reports the practical application of this advanced technology and the system performance. |
| Databáze: | OpenAIRE |
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