Construction of biochar-based organohalide-respiring bacterial agent for remediation of 2,4,6-trichlorophenol contaminated soil.

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  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 9422688 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3336 (Electronic) Linking ISSN: 03043894 NLM ISO Abbreviation: J Hazard Mater Subsets: MEDLINE
    • Publication Information:
      Original Publication: Amsterdam : Elsevier,
    • Subject Terms:
      Charcoal*/chemistry ; Soil Pollutants*/metabolism ; Soil Pollutants*/chemistry ; Chlorophenols*/metabolism ; Chlorophenols*/chemistry ; Soil Microbiology* ; Biodegradation, Environmental*; Halogenation ; Pseudomonas aeruginosa/metabolism ; Bacteria/metabolism
    • Abstract:
      Construction of an efficient bio-reductive dechlorination system remains challenging due to the narrow ecological niche and low-growth rate of organohalide-respiring bacteria during field remediation. In this study, a biochar-based organohalide-respiring bacterial agent was obtained, and its performance and effects on indigenous microbial composition, diversity, and inter-relationship in soil were investigated. A well-performing material, Triton X-100 modified biochar (BC 600-TX100 ), was found to have the superior average pore size, specific surface area and hydrophicity, compared to other materials. Interestingly, Pseudomonas aeruginosa CP-1, which is capable of 2,4,6-TCP dechlorination, showed a 348 times higher colonization cell number on BC 600-TX100 than that of BC600 after 7 d. Meanwhile, the dechlorination rate in soil showed the highest (0.732 d -1 ) in the BC 600-TX100 bacterial agent than in the other agents. The long-term performance of the BC 600-TX100 OHRB agent was also verified, with a stable dechlorination activity over six cycles. Soil microbial community analysis found the addition of the BC 600-TX100 OHRB agent significantly increased the relative abundance of genus Pseudomonas from 1.53 % to 11.2 %, and Pseudomonas formed a close interaction relationship with indigenous microorganisms, creating a micro-ecological environment conducive to reductive dechlorination. This study provides a feasible bacterial agent for the in-situ bioremediation of soil contaminated organohalides. ENVIRONMENTAL IMPLICATION: Halogenated organic compounds are a type of toxic, refractory, and bio-accumulative persistent compounds widely existed in environment, widely detected in the air, water, and soil. In this study, we provide a feasible bacterial agent for the in-situ bioremediation of soil contaminated halogenated organic compounds. The application of biochar provides new insights for "Turning waste into treasure", which meets with the concept of green chemistry.
      Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier B.V. All rights reserved.)
    • Contributed Indexing:
      Keywords: 2,4,6-TCP reductive dechlorination; Bacterial community structure and interaction; Biochar based bacterial agent; Organohalide-respiring bacteria; Soil remediation
    • Accession Number:
      16291-96-6 (Charcoal)
      0 (biochar)
      0 (Soil Pollutants)
      0 (Chlorophenols)
      MHS8C5BAUZ (2,4,6-trichlorophenol)
    • Publication Date:
      Date Created: 20240508 Date Completed: 20240529 Latest Revision: 20240529
    • Publication Date:
      20240529
    • Accession Number:
      10.1016/j.jhazmat.2024.134438
    • Accession Number:
      38718504