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Treatment of acid orange 7 solution by sunlight-Fenton process applying natural iron-bearing minerals.

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Title: Treatment of acid orange 7 solution by sunlight-Fenton process applying natural iron-bearing minerals.
Authors: Peng, Huiling1 (AUTHOR), Lai, Faying1,2 (AUTHOR), Xiong, Jiaping1,3 (AUTHOR), Lai, Rongsheng1 (AUTHOR), Gao, Lili1 (AUTHOR), Zhang, Yifeng1 (AUTHOR), Fang, Hansun1,2 (AUTHOR), He, Jinbao1,2 (AUTHOR) jinhe@jxau.edu.cn
Source: Solar Energy. Nov2025, Vol. 301, pN.PAG-N.PAG. 1p.
Subjects: Iron ions, Flocculation, Treatment effectiveness, Azo dyes, Catalysts, Iron catalysts, Haber-Weiss reaction, Photocatalytic oxidation
Abstract: [Display omitted] • Visible band contributed about 74% of the treatment effect of sunlight-Fenton. • Treatment efficiency strongly correlated with the contents of dissolved iron ions from minerals. • Photocatalytic oxidation had a certain contribution at low contents of dissolved iron ions. • Flocculation had obvious influence on the removal effect at high contents of dissolved iron ions. Natural pyrite, magnetite, ilmenite, V-Ti magnetite, magnesioferrite, and iron tourmaline were used as catalysts in sunlight-Fenton system for the treatment of azo dye acid orange 7 (AO7) solution. About 74 % of the treatment effect was contributed by the 400–780 nm visible band of simulated sunlight. There was a significant correlation between the treatment effect and the contents of total iron ions dissolved from minerals. By comparing with the homogeneous sunlight-Fenton system with equal contents of dissolved iron ions, it was found that the treatment effect of the mineral-catalyzed sunlight-Fenton mainly came from the homogeneous reaction of dissolved iron ions. In addition, the effect of direct sunlight photolysis and photo-assisted decomposition of H 2 O 2 was weak, while the photocatalytic oxidation of pyrite, magnetite and magnesioferrite after repeated use for 1 to 3 times had a certain contribution. The flocculation process due to the dissolved iron ions of pyrite, V-Ti magnetite and iron tourmaline had obvious influence on the sunlight-Fenton treatment effect. Iron tourmaline showed the most stable and efficient removal performance with about 30 % TOC removal rate in the system, which was related to a high quantity of leached iron ions rather than its ability to heterogeneously catalyze Fenton process. [ABSTRACT FROM AUTHOR]
Copyright of Solar Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Treatment of acid orange 7 solution by sunlight-Fenton process applying natural iron-bearing minerals.
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  Data: <searchLink fieldCode="AR" term="%22Peng%2C+Huiling%22">Peng, Huiling</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lai%2C+Faying%22">Lai, Faying</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiong%2C+Jiaping%22">Xiong, Jiaping</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lai%2C+Rongsheng%22">Lai, Rongsheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gao%2C+Lili%22">Gao, Lili</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yifeng%22">Zhang, Yifeng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fang%2C+Hansun%22">Fang, Hansun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Jinbao%22">He, Jinbao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> jinhe@jxau.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Solar+Energy%22">Solar Energy</searchLink>. Nov2025, Vol. 301, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Iron+ions%22">Iron ions</searchLink><br /><searchLink fieldCode="DE" term="%22Flocculation%22">Flocculation</searchLink><br /><searchLink fieldCode="DE" term="%22Treatment+effectiveness%22">Treatment effectiveness</searchLink><br /><searchLink fieldCode="DE" term="%22Azo+dyes%22">Azo dyes</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Iron+catalysts%22">Iron catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Haber-Weiss+reaction%22">Haber-Weiss reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalytic+oxidation%22">Photocatalytic oxidation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: [Display omitted] • Visible band contributed about 74% of the treatment effect of sunlight-Fenton. • Treatment efficiency strongly correlated with the contents of dissolved iron ions from minerals. • Photocatalytic oxidation had a certain contribution at low contents of dissolved iron ions. • Flocculation had obvious influence on the removal effect at high contents of dissolved iron ions. Natural pyrite, magnetite, ilmenite, V-Ti magnetite, magnesioferrite, and iron tourmaline were used as catalysts in sunlight-Fenton system for the treatment of azo dye acid orange 7 (AO7) solution. About 74 % of the treatment effect was contributed by the 400–780 nm visible band of simulated sunlight. There was a significant correlation between the treatment effect and the contents of total iron ions dissolved from minerals. By comparing with the homogeneous sunlight-Fenton system with equal contents of dissolved iron ions, it was found that the treatment effect of the mineral-catalyzed sunlight-Fenton mainly came from the homogeneous reaction of dissolved iron ions. In addition, the effect of direct sunlight photolysis and photo-assisted decomposition of H 2 O 2 was weak, while the photocatalytic oxidation of pyrite, magnetite and magnesioferrite after repeated use for 1 to 3 times had a certain contribution. The flocculation process due to the dissolved iron ions of pyrite, V-Ti magnetite and iron tourmaline had obvious influence on the sunlight-Fenton treatment effect. Iron tourmaline showed the most stable and efficient removal performance with about 30 % TOC removal rate in the system, which was related to a high quantity of leached iron ions rather than its ability to heterogeneously catalyze Fenton process. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Solar Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.solener.2025.113947
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Iron ions
        Type: general
      – SubjectFull: Flocculation
        Type: general
      – SubjectFull: Treatment effectiveness
        Type: general
      – SubjectFull: Azo dyes
        Type: general
      – SubjectFull: Catalysts
        Type: general
      – SubjectFull: Iron catalysts
        Type: general
      – SubjectFull: Haber-Weiss reaction
        Type: general
      – SubjectFull: Photocatalytic oxidation
        Type: general
    Titles:
      – TitleFull: Treatment of acid orange 7 solution by sunlight-Fenton process applying natural iron-bearing minerals.
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            NameFull: Peng, Huiling
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            NameFull: Lai, Faying
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            NameFull: Xiong, Jiaping
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            NameFull: Lai, Rongsheng
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            NameFull: Fang, Hansun
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            NameFull: He, Jinbao
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            – D: 15
              M: 11
              Text: Nov2025
              Type: published
              Y: 2025
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              Value: 301
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            – TitleFull: Solar Energy
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