The key role of oxygen in the bioremoval of 2,4-diaminoanisole (DAAN), the biotransformation product of the insensitive munitions compound 2,4-dinitroanisole (DNAN), over other electron acceptors.
2,4-Dinitroanisole (DNAN)
Aromatic amine
Enrichment culture
Insensitive high explosives
Insensitive munitions formulations
Sludge microcosms
Journal
Chemosphere
ISSN: 1879-1298
Titre abrégé: Chemosphere
Pays: England
ID NLM: 0320657
Informations de publication
Date de publication:
Mar 2021
Mar 2021
Historique:
received:
30
06
2020
revised:
19
09
2020
accepted:
02
11
2020
pubmed:
14
11
2020
medline:
22
1
2021
entrez:
13
11
2020
Statut:
ppublish
Résumé
Insensitive munitions compounds, such as 2,4-dinitroanisole (DNAN), are replacing conventional explosives. DNAN is anaerobically reduced to 2,4-diaminoanisole (DAAN), a toxic aromatic amine. However, the removal of DAAN under different redox conditions is yet to be elucidated. Herein, we analyzed DAAN consumption in biotic and abiotic microcosms when exposed to different redox conditions (without added electron acceptor, without added electron acceptor but with pyruvate as a co-substrate, with sulfate, with nitrate, and with oxygen), using an anaerobic sludge as inoculum. We observed that DAAN autoxidation, an abiotic reaction, was significant in microaerobic environments. DAAN also reacted abiotically with heat-killed sludge up to a saturation limit of 67.4 μmol DAAN (g VSS heat-killed sludge)
Identifiants
pubmed: 33183786
pii: S0045-6535(20)33060-5
doi: 10.1016/j.chemosphere.2020.128862
pii:
doi:
Substances chimiques
Anisoles
0
Explosive Agents
0
Phenylenediamines
0
2,4-dinitroanisole
1L0OD70295
4-methoxy-3-phenylenediamine
86SSM2N1X7
Oxygen
S88TT14065
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
128862Informations de copyright
Copyright © 2020. Published by Elsevier Ltd.
Déclaration de conflit d'intérêts
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.