Insights from multiple stable isotopes (C, N, Cl) into the photodegradation of herbicides atrazine and metolachlor DOI Creative Commons

Matias Levesque-Vargas,

Leanne Ohlund,

Lekha Sleno

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 370, P. 144010 - 144010

Published: Dec. 24, 2024

Many processes can contribute to the attenuation of frequently detected and toxic herbicides atrazine metolachlor in surface water, including photodegradation. Multi-element compound-specific isotope analysis has potential decipher between these different degradation pathways as Cl is a promising tool for both pathway identification sensitive indicator metolachlor. In this study, photodegradation experiments were conducted under simulated sunlight buffered solutions (direct photodegradation) with nitrate (indirect by OH radicals) determine kinetics, transformation products fractionation C, N first time Cl. For metolachlor, C-Cl dual slope (Λ

Language: Английский

Fate and degradation of methoxychlor in a contaminated aquifer: insights from dual carbon-chlorine isotope analysis and isomeric fraction DOI

Martí Vinyes-Nadal,

Sergio Gil-Villalba, Mònica Rosell

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 488, P. 137447 - 137447

Published: Jan. 29, 2025

Language: Английский

Citations

0
Role of membrane porosity in passive sampling of aquatic contaminants for stable isotope analysis: enhancement of analyte accumulation rates and selectivity DOI Creative Commons

Armela Tafa,

Anat Bernstein, Martin Elsner

et al.

Analytical and Bioanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Abstract Compound-specific isotope analysis (CSIA) is a potent method for illustrating the in situ degradation of aquatic contaminants. However, its application to surface and groundwater hindered by low contaminant concentrations, typically nanogram-per-litre range, requiring processing large water volumes. Polar organic chemical integrative samplers (POCIS) have shown promising results when combined with CSIA, yet their extended deployment time accumulate sufficient analyte mass remains major limitation. In our study, we addressed this issue increasing pore size polyethersulfone membrane (PES) from 0.1 8 $$\upmu $$ μ m. This resulted significant increases accumulation rates atrazine (3.5-fold), S-metolachlor (3.4-fold), boscalid (3.0-fold). Importantly, larger sizes did not compromise isotopic integrity, $$\Delta \delta ^{13}$$ Δ δ 13 C $$\le +0.4\pm 0.1$$ ≤ + 0.4 ± 0.1 ‰ ^{15}$$ 15 N -0.6\pm 0.4$$ - 0.6 ‰, both within accepted uncertainties. Additionally, observed an enhanced selectivity pores towards target analytes over humic acids, whereas no increase (bio)fouling potential was detected m membrane, as demonstrated gravimetric analysis, SEM measurements, rates, ratios fouled unfouled POCIS. Our findings show that reduces expedites required gas chromatography ratio spectrometry, offering expand CSIA low-concentration pesticide field. Graphical abstract

Language: Английский

Citations

0
Polyethersulfone potential in single and dual-phase passive samplers: A review DOI Creative Commons
Henry MacKeown, Chiara Scapuzzi, Barbara Benedetti

et al.

Microchemical Journal, Journal Year: 2025, Volume and Issue: unknown, P. 112958 - 112958

Published: Feb. 1, 2025

Language: Английский

Citations

0
Dual C and Cl compound-specific isotope analysis and metagenomic insights into the degradation of the pesticide methoxychlor DOI Creative Commons

Martí Vinyes-Nadal,

Steffen Kümmel, Yolanda Espín

et al.

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 480, P. 135929 - 135929

Published: Sept. 20, 2024

Language: Английский

Citations

2
Insights from multiple stable isotopes (C, N, Cl) into the photodegradation of herbicides atrazine and metolachlor DOI Creative Commons

Matias Levesque-Vargas,

Leanne Ohlund,

Lekha Sleno

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 370, P. 144010 - 144010

Published: Dec. 24, 2024

Many processes can contribute to the attenuation of frequently detected and toxic herbicides atrazine metolachlor in surface water, including photodegradation. Multi-element compound-specific isotope analysis has potential decipher between these different degradation pathways as Cl is a promising tool for both pathway identification sensitive indicator metolachlor. In this study, photodegradation experiments were conducted under simulated sunlight buffered solutions (direct photodegradation) with nitrate (indirect by OH radicals) determine kinetics, transformation products fractionation C, N first time Cl. For metolachlor, C-Cl dual slope (Λ

Language: Английский

Citations

0