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Badea SL, Niculescu VC, Popescu Stegarus DI, Geana EI, Ciucure CT, Botoran OR, Ionete RE. Recent progresses in compound specific isotope analysis of halogenated persistent organic pollutants. Assessing the transformation of halogenated persistent organic pollutants at contaminated sites. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165344. [PMID: 37414185 DOI: 10.1016/j.scitotenv.2023.165344] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/14/2023] [Accepted: 07/03/2023] [Indexed: 07/08/2023]
Abstract
Compound specific isotope analysis was extensively used to characterise the environmental processes associated with the abiotic and biotic transformation of persistent halogenated organic pollutants including those of contaminants of emerging concern (CECs). In the last years, the compound specific isotope analysis was applied as tool to evaluate the environmental fate and was expanded to larger molecules like brominated flame retardants and polychlorinated biphenyls. Multi-element (C, H, Cl, Br) CSIA methods have been also employed both in laboratory and field experiments. Nevertheless, despite the instrumental advances of isotope ratio mass spectrometers systems, the instrumental detection limit for gas chromatography-combustion-isotope ratio mass spectrometer (GC-C-IRMS) systems is challenging, especially when it is utilized to δ13C analysis. Liquid chromatography-combustion isotope ratio mass spectrometry methods are challenging, taking into consideration the chromatographic resolution required when analysing complex mixtures. For chiral contaminants, enantioselective stable isotope analysis (ESIA) has turned up as alternative approach but, up to now, it has been used for a limited number of compounds. Taking into consideration the occurrence of new emerging halogenated organic contaminants, new GC and LC methods for non-target screening using high resolution mass spectrometry are needed to be developed prior to the compound specific isotope analysis (CSIA) methods.
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Affiliation(s)
- Silviu-Laurentiu Badea
- National Research and Development Institute for Cryogenic and Isotopic Technologies, 4(th) Uzinei Street, 240050 Râmnicu Vâlcea, Romania.
| | - Violeta-Carolina Niculescu
- National Research and Development Institute for Cryogenic and Isotopic Technologies, 4(th) Uzinei Street, 240050 Râmnicu Vâlcea, Romania
| | - Diana-Ionela Popescu Stegarus
- National Research and Development Institute for Cryogenic and Isotopic Technologies, 4(th) Uzinei Street, 240050 Râmnicu Vâlcea, Romania
| | - Elisabeta-Irina Geana
- National Research and Development Institute for Cryogenic and Isotopic Technologies, 4(th) Uzinei Street, 240050 Râmnicu Vâlcea, Romania
| | - Corina-Teodora Ciucure
- National Research and Development Institute for Cryogenic and Isotopic Technologies, 4(th) Uzinei Street, 240050 Râmnicu Vâlcea, Romania
| | - Oana-Romina Botoran
- National Research and Development Institute for Cryogenic and Isotopic Technologies, 4(th) Uzinei Street, 240050 Râmnicu Vâlcea, Romania
| | - Roxana-Elena Ionete
- National Research and Development Institute for Cryogenic and Isotopic Technologies, 4(th) Uzinei Street, 240050 Râmnicu Vâlcea, Romania
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Badea SL, Stegarus DI, Niculescu VC, Enache S, Soare A, Ionete RE, Gori D, Höhener P. Dehalogenation of α-hexachlorocyclohexane by iron sulfide nanoparticles: Study of reaction mechanism with stable carbon isotopes and pH variations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 801:149672. [PMID: 34438148 DOI: 10.1016/j.scitotenv.2021.149672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 08/10/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Abstract
The biodegradation of hexachlorocyclohexanes (HCHs) is known to be accompanied by isotope fractionation of carbon (13C/12C), but no systematic studies were performed on abiotic degradation of HCH isomers by iron (II) minerals. In this study, we explored the carbon isotope fractionation of α-HCH during dechlorination by FeS nanoparticles at different pH values. The results of three different experiments showed that the apparent rate constants during dehalogenation of α-HCH by FeS increased with pH. The lowest apparent rate constant value α-HCH during dehalogenation by FeS was 0.009 d-1 at pH value of 2.4, while the highest was 1.098 d-1 at pH 11.8. α-HCH was completely dechlorinated by FeS only at pH values 9.9 and 11.8, while the corresponding apparent rate constants were 0.253 d-1 and 1.098 d-1, respectively. Regardless of the pH used, the 1,2,4-trichlorobenzene (1,2,4-TCB), 1,2-dichlorobenzene (1,2-DCB), and benzene were the dominant degradation products of α-HCH. An enrichment factor (εC) of -4.7 ± 1.3‰ was obtained for α-HCH using Rayleigh model, which is equivalent to an apparent kinetic isotope effect (AKIEC) value of 1.029 ± 0.008 for dehydrohalogenation, and of 1.014 ± 0.004 for dihaloelimination, respectively. The magnitude of isotope fractionation from this study suggests that abiotic isotope fractionation by FeS must be taken into account in anoxic sediments and aquifers contaminated with HCH isomers, when high concentrations of FeS are present in the above-mentioned anoxic environments.
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Affiliation(s)
- Silviu-Laurentiu Badea
- National Research and Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Vâlcea, 4(th) Uzinei Street, 240050 Ramnicu Vâlcea, Romania.
| | - Diana-Ionela Stegarus
- National Research and Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Vâlcea, 4(th) Uzinei Street, 240050 Ramnicu Vâlcea, Romania
| | - Violeta-Carolina Niculescu
- National Research and Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Vâlcea, 4(th) Uzinei Street, 240050 Ramnicu Vâlcea, Romania
| | - Stanica Enache
- National Research and Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Vâlcea, 4(th) Uzinei Street, 240050 Ramnicu Vâlcea, Romania
| | - Amalia Soare
- Environmental Chemistry Laboratory (LCE), Aix-Marseille Université-CNRS UMR 7376, 3 place Victor Hugo - Case 29, 13331 Marseille Cedex 3, France
| | - Roxana-Elena Ionete
- National Research and Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Vâlcea, 4(th) Uzinei Street, 240050 Ramnicu Vâlcea, Romania
| | - Didier Gori
- Environmental Chemistry Laboratory (LCE), Aix-Marseille Université-CNRS UMR 7376, 3 place Victor Hugo - Case 29, 13331 Marseille Cedex 3, France
| | - Patrick Höhener
- Environmental Chemistry Laboratory (LCE), Aix-Marseille Université-CNRS UMR 7376, 3 place Victor Hugo - Case 29, 13331 Marseille Cedex 3, France
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Julien M, Liégeois M, Höhener P, Paneth P, Remaud GS. Intramolecular non-covalent isotope effects at natural abundance associated with the migration of paracetamol in solid matrices during liquid chromatography. J Chromatogr A 2021; 1639:461932. [PMID: 33535117 DOI: 10.1016/j.chroma.2021.461932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 10/22/2022]
Abstract
Position-specific isotope analysis by Nuclear Magnetic Resonance spectrometry was employed to study the 13C intramolecular isotopic fractionation associated with the migration of organic substrates through different stationary phases chromatography columns. Liquid chromatography is often used to isolate compounds prior to their isotope analysis and this purification step potentially alters the isotopic composition of target compounds introducing a bias in the later measured data. Moreover, results from liquid chromatography can yield the sorption parameters needed in reactive transport models that predict the transport and fate of organic contaminants to in the environment. The aim of this study was to use intramolecular isotope analysis to study both 13C and 15N isotope effects associated with the elution of paracetamol (acetaminophen) through different stationary phases and to compare them to effects observed previously for vanillin. Results showed very different intramolecular isotope fractionation profiles depending on the chemical structure of the stationary phase. The data also demonstrate that both the amplitude and the distribution of measured isotope effects depend on the nature of the non-covalent interactions involved in the migration process. Results provided by theoretical calculation performed during this study also confirmed the direct link between observed intramolecular isotope fractionation and the nature of involved intermolecular interactions. It is concluded that the nature of the stationary phase through which the substrate passes has a major impact on the intramolecular isotopic composition of organic compounds isolated by chromatography methods..
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Affiliation(s)
- Maxime Julien
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ōokayama, Meguro-ku, Tokyo, 152-8551 Japan; Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France.
| | | | - Patrick Höhener
- University of Aix-Marseille-CNRS, Laboratoire Chimie Environnement, UMR 7376, place Victor Hugo 3, 13331 Marseille, France
| | - Piotr Paneth
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Gérald S Remaud
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
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Julien M, Gori D, Höhener P, Robins RJ, Remaud GS. Intramolecular isotope effects during permanganate oxidation and acid hydrolysis of methyl tert-butyl ether. CHEMOSPHERE 2020; 248:125975. [PMID: 32007772 DOI: 10.1016/j.chemosphere.2020.125975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 10/01/2019] [Accepted: 01/19/2020] [Indexed: 06/10/2023]
Abstract
Stable isotopes have been widely used to monitor remediation of environmental contaminants over the last decades. This approach gives a good mechanistic description of natural or assisted degradation of organic pollutants, such as methyl tert-butyl ether (MTBE). Since abiotic degradation seems to be the most promising assisted attenuation method, the isotopic fractionation associated with oxidation and hydrolysis processes need to be further investigated in order to understand better these processes and make their monitoring more efficient. In this study, position-specific isotope effects (PSIEs) associated with permanganate oxidation and acid hydrolysis of MTBE were determined using isotope ratio monitoring by 13C Nuclear Magnetic Resonance Spectrometry (irm-13C NMR) combined with isotope ratio monitoring by Mass Spectrometry (irm-MS). The use of this Position-Specific Isotopic Analysis (PSIA) method makes it possible to observe a specific normal isotope effect (IE) associated with each of these two abiotic degradation mechanisms. The present work demonstrates that the 13C isotope pattern of the main degradation product, tert-butyl alcohol (TBA), depends on the chemical reaction by which it is produced. Furthermore, this study also demonstrates that PSIA at natural abundance can give new insights into reaction mechanisms and that this methodology is very promising for the future of modeling the remediation of organic contaminants.
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Affiliation(s)
- Maxime Julien
- Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan; EBSI Team, CEISAM, University of Nantes-CNRS UMR 6230, 2 Rue de la Houssinière BP 92208, F-44322, Nantes, France.
| | - Didier Gori
- University of Aix-Marseille-CNRS, Laboratoire Chimie Environnement, UMR 7376, Place Victor Hugo 3, 13331 Marseille, France
| | - Patrick Höhener
- University of Aix-Marseille-CNRS, Laboratoire Chimie Environnement, UMR 7376, Place Victor Hugo 3, 13331 Marseille, France
| | - Richard J Robins
- EBSI Team, CEISAM, University of Nantes-CNRS UMR 6230, 2 Rue de la Houssinière BP 92208, F-44322, Nantes, France
| | - Gérald S Remaud
- EBSI Team, CEISAM, University of Nantes-CNRS UMR 6230, 2 Rue de la Houssinière BP 92208, F-44322, Nantes, France
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Intramolecular isotopic evidence for bacterial oxidation of propane in subsurface natural gas reservoirs. Proc Natl Acad Sci U S A 2019; 116:6653-6658. [PMID: 30886103 PMCID: PMC6452727 DOI: 10.1073/pnas.1817784116] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Microbial anaerobic oxidation of hydrocarbons is a key process potentially involved in a myriad of geological and biochemical environments yet has remained notoriously difficult to identify and quantify in natural environments. We performed position-specific carbon isotope analysis of propane from cracking and incubation experiments. Anaerobic bacterial oxidation of propane leads to a pronounced and previously unidentified 13C enrichment in the central position of propane, which contrasts with the isotope signature associated with the thermogenic process. This distinctive signature allows the detection and quantification of anaerobic oxidation of hydrocarbons in diverse natural gas reservoirs and suggests that this process may be more widespread than previously thought. Position-specific isotope analysis can elucidate the fate of natural gas hydrocarbons and provide insight into a major but previously cryptic process controlling the biogeochemical cycling of globally significant greenhouse gases.
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