Two Pathways Compete in the Mn(II)-Catalyzed Oxidation of Aminotrismethylene Phosphonate (ATMP).
C−P bond cleavage
Mn(III)-complexes, abiotic transformation
aminopolyphosphonates
carbon CSIA
chelating agents
equilibrium speciation modeling
kinetic carbon isotope fractionation
Journal
Environmental science & technology
ISSN: 1520-5851
Titre abrégé: Environ Sci Technol
Pays: United States
ID NLM: 0213155
Informations de publication
Date de publication:
05 04 2022
05 04 2022
Historique:
pubmed:
17
3
2022
medline:
7
4
2022
entrez:
16
3
2022
Statut:
ppublish
Résumé
Mn(II)-catalyzed oxidation by molecular oxygen is considered a relevant process for the environmental fate of aminopolyphosphonate chelating agents such as aminotrismethylene phosphonate (ATMP). However, the potential roles of Mn(III)ATMP-species in the underlying transformation mechanisms are not fully understood. We combined kinetic studies, compound-specific stable carbon isotope analysis, and equilibrium speciation modeling to shed light on the significance of such Mn-ATMP species for the overall ATMP oxidation by molecular oxygen. The fraction of ATMP complexed with Mn(II) inversely correlated with both (i) the Mn(II)-normalized transformation rate constants of ATMP and (ii) the observed carbon isotope enrichment factors (ε
Identifiants
pubmed: 35294177
doi: 10.1021/acs.est.1c06407
doi:
Substances chimiques
Carbon Isotopes
0
Organophosphonates
0
cyclic adenosine-5'-trimetaphosphate
53355-60-5
Cyclic AMP
E0399OZS9N
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM