Complete 2,4,6-trichlorophenol degradation by anaerobic sludge acclimated with 4-chlorophenol: Synergetic effect of nZVI@BMPC and sodium lactate as an external nutrient.

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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:
      Chlorophenols*/chemistry ; Chlorophenols*/metabolism ; Sewage*/microbiology ; Iron*/chemistry ; Biodegradation, Environmental*; Anaerobiosis ; Water Pollutants, Chemical/chemistry ; Water Pollutants, Chemical/metabolism ; Bacteria/metabolism ; Metal Nanoparticles/chemistry
    • Abstract:
      Ball-milled plastic char supported nano zero-valent iron (nZVI@BMPC) and their application combined with anaerobic sludge for microbial dechlorination of 2,4,6-trichlorophenol (2,4,6-TCP) were investigated. The XRD and FTIR analysis proved composition of zero valent states of iron, and the BET and SEM analysis showed that nZVI was uniformly distributed on the surface of BMPC. Successive addition of 1000 mg/L sodium lactate and nZVI@BMPC enhanced the acclamation of anaerobic sludge and resulted in the degradation of 4-CP within 80 days. The acclimated consortium with nZVI@BMPC completely degraded 2,4,6-TCP into CH 4 and CO 2 , and the key dechlorination route was through 4-CP dechlorinaion and mineralization. The degradation rate of 2,4,6-TCP with nZVI@BMPC was 0.22/d, greater than that without nZVI@BMPC. The dechlorination efficiency was enhanced in the Fe 2+ /Fe 3+ system controlled by nZVI@BMPC and iron-reducing bacteria. Metagenomic analysis result showed that the dominant de-chlorinators were Chloroflexi sp., Desulfovibrio, and Pseudomonas, which could directly degrade 2,4,6-TCP to 4-CP, especially, Chloroflexi bacterium could concurrently be used to mineralize 4-CP. The relative abundance of the functional genes cprA, acoA, acoB, and tfdB increased significantly in the presence of the nZVI@BMPC. This study provides a new strategy can be a good alternative for possible application in groundwater remediation.
      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: Ball-milled plastic char; Chlorophenol; Iron-reducing bacteria; Mineralization; NZVI
    • Accession Number:
      0 (Chlorophenols)
      MHS8C5BAUZ (2,4,6-trichlorophenol)
      0 (Sewage)
      E1UOL152H7 (Iron)
      3DLC36A01X (4-chlorophenol)
      0 (Water Pollutants, Chemical)
    • Publication Date:
      Date Created: 20240702 Date Completed: 20240808 Latest Revision: 20240808
    • Publication Date:
      20240808
    • Accession Number:
      10.1016/j.jhazmat.2024.135063
    • Accession Number:
      38954853