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Fenton and Photo-Fenton for Treatment of Red Water Containing Trinitrotoluene: A Comparative Study

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Title: Fenton and Photo-Fenton for Treatment of Red Water Containing Trinitrotoluene: A Comparative Study
Authors: Nguyen Trung Dung, Le Thanh Dat, Hoang Thi Tue Minh, Nguyen Phuong Thao, Nguyen Thi Thuy, Nguyen Thi Cam Tien, Nguyen Nhat Huy
Source: Applied Environmental Research, Vol 46, Iss 2 (2024)
Publisher Information: Environmental Research Institute, Chulalongkorn University, 2024.
Publication Year: 2024
Collection: LCC:Environmental sciences
LCC:Environmental technology. Sanitary engineering
Subject Terms: Fenton, Photo-Fenton, Red water, Trinitrotoluene, Advanced oxidation processes, Environmental sciences, GE1-350, Environmental technology. Sanitary engineering, TD1-1066
More Details: Wastewater originating from the production of TNT explosives (red water) contains special hazardous substances that must be treated before discharging into the water environment. In this study, we applied both conventional Fenton and photo-Fenton (UV-Fenton) processes to treat COD and color in red water. In the Fenton process, the COD and color removal efficiencies were 75.5 and 92.4%, respectively, under optimal operating conditions of pH = 3, [Fe2+] = 0.3 g L-1, H2O2/Fe(Ⅱ) ratio = 10:1, reaction time = 120 min. In the UV-Fenton process, the efficiencies were 76.1 and 94.2%, respectively, under optimal operating conditions of pH = 3, [Fe2+] = 0.21 g L-1, H2O2/Fe(Ⅱ) ratio = 7:1, reaction time = 90 min. These results indicate that the use of ultraviolet could reduce not only the reaction time but also the chemical use (i.e. H2O2 and Fe2+), thus reducing the sludge production. Importantly, the UV-Fenton process significantly increased the BOD5/COD ratio from 0.13 to 0.58, which greatly enhanced the biodegradability of the wastewater for biological treatment. Therefore, UV-Fenton can be applied as an effective pretreatment in the treatment of red water with high color and organic pollutants.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 2287-075X
Relation: https://ph01.tci-thaijo.org/index.php/aer/article/view/255215; https://doaj.org/toc/2287-075X
DOI: 10.35762/AER.2024026
Access URL: https://doaj.org/article/9ee1378c764441f787384b460193c257
Accession Number: edsdoj.9ee1378c764441f787384b460193c257
Database: Directory of Open Access Journals
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  Data: Fenton and Photo-Fenton for Treatment of Red Water Containing Trinitrotoluene: A Comparative Study
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  Data: <searchLink fieldCode="AR" term="%22Nguyen+Trung+Dung%22">Nguyen Trung Dung</searchLink><br /><searchLink fieldCode="AR" term="%22Le+Thanh+Dat%22">Le Thanh Dat</searchLink><br /><searchLink fieldCode="AR" term="%22Hoang+Thi+Tue+Minh%22">Hoang Thi Tue Minh</searchLink><br /><searchLink fieldCode="AR" term="%22Nguyen+Phuong+Thao%22">Nguyen Phuong Thao</searchLink><br /><searchLink fieldCode="AR" term="%22Nguyen+Thi+Thuy%22">Nguyen Thi Thuy</searchLink><br /><searchLink fieldCode="AR" term="%22Nguyen+Thi+Cam+Tien%22">Nguyen Thi Cam Tien</searchLink><br /><searchLink fieldCode="AR" term="%22Nguyen+Nhat+Huy%22">Nguyen Nhat Huy</searchLink>
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  Data: Applied Environmental Research, Vol 46, Iss 2 (2024)
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  Data: Environmental Research Institute, Chulalongkorn University, 2024.
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  Data: <searchLink fieldCode="DE" term="%22Fenton%22">Fenton</searchLink><br /><searchLink fieldCode="DE" term="%22Photo-Fenton%22">Photo-Fenton</searchLink><br /><searchLink fieldCode="DE" term="%22Red+water%22">Red water</searchLink><br /><searchLink fieldCode="DE" term="%22Trinitrotoluene%22">Trinitrotoluene</searchLink><br /><searchLink fieldCode="DE" term="%22Advanced+oxidation+processes%22">Advanced oxidation processes</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+sciences%22">Environmental sciences</searchLink><br /><searchLink fieldCode="DE" term="%22GE1-350%22">GE1-350</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+technology%2E+Sanitary+engineering%22">Environmental technology. Sanitary engineering</searchLink><br /><searchLink fieldCode="DE" term="%22TD1-1066%22">TD1-1066</searchLink>
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  Label: Description
  Group: Ab
  Data: Wastewater originating from the production of TNT explosives (red water) contains special hazardous substances that must be treated before discharging into the water environment. In this study, we applied both conventional Fenton and photo-Fenton (UV-Fenton) processes to treat COD and color in red water. In the Fenton process, the COD and color removal efficiencies were 75.5 and 92.4%, respectively, under optimal operating conditions of pH = 3, [Fe2+] = 0.3 g L-1, H2O2/Fe(Ⅱ) ratio = 10:1, reaction time = 120 min. In the UV-Fenton process, the efficiencies were 76.1 and 94.2%, respectively, under optimal operating conditions of pH = 3, [Fe2+] = 0.21 g L-1, H2O2/Fe(Ⅱ) ratio = 7:1, reaction time = 90 min. These results indicate that the use of ultraviolet could reduce not only the reaction time but also the chemical use (i.e. H2O2 and Fe2+), thus reducing the sludge production. Importantly, the UV-Fenton process significantly increased the BOD5/COD ratio from 0.13 to 0.58, which greatly enhanced the biodegradability of the wastewater for biological treatment. Therefore, UV-Fenton can be applied as an effective pretreatment in the treatment of red water with high color and organic pollutants.
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        Value: 10.35762/AER.2024026
    Languages:
      – Text: English
    Subjects:
      – SubjectFull: Fenton
        Type: general
      – SubjectFull: Photo-Fenton
        Type: general
      – SubjectFull: Red water
        Type: general
      – SubjectFull: Trinitrotoluene
        Type: general
      – SubjectFull: Advanced oxidation processes
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      – SubjectFull: Environmental sciences
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      – SubjectFull: Environmental technology. Sanitary engineering
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        Type: general
    Titles:
      – TitleFull: Fenton and Photo-Fenton for Treatment of Red Water Containing Trinitrotoluene: A Comparative Study
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            NameFull: Nguyen Trung Dung
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              Y: 2024
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