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. |
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| 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] |
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| Database: | GreenFILE |
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| 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] |
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| ISSN: | 09593330 |
| DOI: | 10.1080/09593330.2025.2597032 |
