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Effect of selenium(IV) on biodegradation of m-dichlorobenzene exhaust gas in biotrickling filters.

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Title: Effect of selenium(IV) on biodegradation of m-dichlorobenzene exhaust gas in biotrickling filters.
Authors: Shan, Xuekai1 (AUTHOR), Lu, Didi2 (AUTHOR), Wang, Peihang2 (AUTHOR), Sun, Zhuqiu2 (AUTHOR), Yang, Bairen2 (AUTHOR) ybairen@163.com
Source: Environmental Technology. Feb2026, Vol. 47 Issue 5, p686-697. 12p.
Subject Terms: *Selenium, *Biodegradation, *Bacteria, *Extraction (Chemistry), *Biofilters, *Dichlorobenzene, Microbial aggregation, Extracellular matrix
Abstract: Selenium(IV) (Se(IV)) supplementation was evaluated as a biostimulant to enhance m-dichlorobenzene (m-DCB) biodegradation in laboratory-scale biotrickling filters (BTFs) inoculated with Brevibacillus agri DH-1. An optimal Se(IV) concentration of 4.0 mg/L increased steady-state m-DCB removal efficiency from 74.38% to 81.74% at an empty bed residence time (EBRT) of 90 s. When the EBRT was reduced to 30 s, BTF2 maintained a 41.74% removal efficiency, compared with only 17.64% for BTF1. Se(IV) promoted extracellular polymeric substance production, strengthened biofilm adhesion, enhanced catechol-1,2- and catechol-2,3-dioxygenase activities, and moderated surface charge to favour microbial aggregation. Fourier-transform infrared spectroscopy confirmed Se(IV)-facilitated dechlorination and aromatic-ring cleavage, while 16S rRNA sequencing revealed enrichment of key degraders including Brevibacillus, Pseudomonas, Bacillus, Rhodanobacter, and Sphingobium. These findings demonstrate a novel micronutrient-based strategy to improve BTF performance for treating chlorinated aromatic exhaust gases. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Technology is the property of Taylor & Francis Ltd 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: Effect of selenium(IV) on biodegradation of m-dichlorobenzene exhaust gas in biotrickling filters.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Shan%2C+Xuekai%22">Shan, Xuekai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Didi%22">Lu, Didi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Peihang%22">Wang, Peihang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Zhuqiu%22">Sun, Zhuqiu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Bairen%22">Yang, Bairen</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> ybairen@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Technology%22">Environmental Technology</searchLink>. Feb2026, Vol. 47 Issue 5, p686-697. 12p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Selenium%22">Selenium</searchLink><br />*<searchLink fieldCode="DE" term="%22Biodegradation%22">Biodegradation</searchLink><br />*<searchLink fieldCode="DE" term="%22Bacteria%22">Bacteria</searchLink><br />*<searchLink fieldCode="DE" term="%22Extraction+%28Chemistry%29%22">Extraction (Chemistry)</searchLink><br />*<searchLink fieldCode="DE" term="%22Biofilters%22">Biofilters</searchLink><br />*<searchLink fieldCode="DE" term="%22Dichlorobenzene%22">Dichlorobenzene</searchLink><br /><searchLink fieldCode="DE" term="%22Microbial+aggregation%22">Microbial aggregation</searchLink><br /><searchLink fieldCode="DE" term="%22Extracellular+matrix%22">Extracellular matrix</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Selenium(IV) (Se(IV)) supplementation was evaluated as a biostimulant to enhance m-dichlorobenzene (m-DCB) biodegradation in laboratory-scale biotrickling filters (BTFs) inoculated with Brevibacillus agri DH-1. An optimal Se(IV) concentration of 4.0 mg/L increased steady-state m-DCB removal efficiency from 74.38% to 81.74% at an empty bed residence time (EBRT) of 90 s. When the EBRT was reduced to 30 s, BTF2 maintained a 41.74% removal efficiency, compared with only 17.64% for BTF1. Se(IV) promoted extracellular polymeric substance production, strengthened biofilm adhesion, enhanced catechol-1,2- and catechol-2,3-dioxygenase activities, and moderated surface charge to favour microbial aggregation. Fourier-transform infrared spectroscopy confirmed Se(IV)-facilitated dechlorination and aromatic-ring cleavage, while 16S rRNA sequencing revealed enrichment of key degraders including Brevibacillus, Pseudomonas, Bacillus, Rhodanobacter, and Sphingobium. These findings demonstrate a novel micronutrient-based strategy to improve BTF performance for treating chlorinated aromatic exhaust gases. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Environmental Technology is the property of Taylor & Francis Ltd 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:
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      – Type: doi
        Value: 10.1080/09593330.2025.2597032
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 686
    Subjects:
      – SubjectFull: Selenium
        Type: general
      – SubjectFull: Biodegradation
        Type: general
      – SubjectFull: Bacteria
        Type: general
      – SubjectFull: Extraction (Chemistry)
        Type: general
      – SubjectFull: Biofilters
        Type: general
      – SubjectFull: Dichlorobenzene
        Type: general
      – SubjectFull: Microbial aggregation
        Type: general
      – SubjectFull: Extracellular matrix
        Type: general
    Titles:
      – TitleFull: Effect of selenium(IV) on biodegradation of m-dichlorobenzene exhaust gas in biotrickling filters.
        Type: main
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          Name:
            NameFull: Shan, Xuekai
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            NameFull: Lu, Didi
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            NameFull: Wang, Peihang
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            NameFull: Sun, Zhuqiu
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            NameFull: Yang, Bairen
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              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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            – TitleFull: Environmental Technology
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