Sustained-release nitrate combined with microbial fuel cell: A novel strategy for PAHs and odor removal from sediment.
Acid volatile sulfide (AVS)
Integrated biostimulation method
Microbial fuel cell (MFC)
PAHs biodegradation
Sustained-release nitrate
Journal
Journal of hazardous materials
ISSN: 1873-3336
Titre abrégé: J Hazard Mater
Pays: Netherlands
ID NLM: 9422688
Informations de publication
Date de publication:
05 08 2023
05 08 2023
Historique:
received:
17
03
2023
revised:
26
04
2023
accepted:
08
05
2023
medline:
30
5
2023
pubmed:
19
5
2023
entrez:
18
5
2023
Statut:
ppublish
Résumé
Nitrate addition is a biostimulation technique that can improve both the oxidation of acid volatile sulfide (AVS) through autotrophic denitrification and the biodegradation of polycyclic aromatic hydrocarbons (PAHs) via heterotrophic denitrification. However, during the remediation, parts of the dissolved nitrate in the sediment migrates from the sediment to the overlying water, leading to the loss of effective electron acceptor. To overcome this limitation, a combined approached was proposed, which involved nitrocellulose addition and a microbial fuel cell (MFC). Results indicated the nitrate could be slowly released and maintained at a higher concentration over long term. In the combined system, the removal efficiencies of PAHs and AVS were 71.56% and 89.76%, respectively. Furthermore, the voltage attained for the MFC-nitrocellulose treatment was maintained at 146.1 mV on Day 70, which was 5.37 times higher than that of the MFC-calcium nitrate treatment. Sediments with nitrocellulose resulted in lower levels of nitrate and ammonium in the overlying water. Metagenomic results revealed that the combined technology improved the expression of nitrogen-cycling genes. The introduction of MFC inhibited sulfide regeneration during incubation by suppressing the enzyme activity like EC4.4.1.2. The enhanced biostimulation provided potential for in-situ bioremediation utilizing MFC coupled with slow-released nitrate (i.e., nitrocellulose) treatment.
Identifiants
pubmed: 37201276
pii: S0304-3894(23)00893-2
doi: 10.1016/j.jhazmat.2023.131610
pii:
doi:
Substances chimiques
Nitrates
0
Polycyclic Aromatic Hydrocarbons
0
Collodion
9004-70-0
Delayed-Action Preparations
0
Water
059QF0KO0R
Sulfides
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
131610Informations de copyright
Copyright © 2023 Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Zhen Zhang reports financial support was provided by Guangzhou Science and Technology Planning Project. Kun Zhang reports financial support was provided by China Postdoctoral Science Foundation.