A low-cost dissolved organic matter probe for aquatic ecosystems DOI Open Access
Marie‐Noëlle Pons,

David Brunello,

J. T. Grissom

и другие.

ARPHA Conference Abstracts, Год журнала: 2025, Номер 8

Опубликована: Май 28, 2025

Naturally occurring dissolved organic matter (NDOM) is a complex, heterogeneous mixture of carbonaceous substances derived either from the excretions living organisms or natural processes decomposition and transformation residues (plants, animals, microorganisms). It plays crucial role in sequestration atmospheric carbon transport metals. Climate change, decrease acidification rivers lakes (Herreid et al. 2024), land-use change discharge anthropogenic are among factors leading to continuous evolution DOM water bodies thus modifying global cycle directly impacting resources such as those used for drinking production (Chen 2025). cannot be defined through specific chemical compounds considered supramolecular assembly small molecules sugars, tannins, proteins, lipids, etc. Optical methods UV-visible spectroscopy fluorescence commonly investigate molecular structural properties laboratories using benchtop devices. Our goal within TERRA FORMA project has been go further by developing an in-situ low-cost spectrometer that combines UV-Visible light absorption measurements analysis DOM, focusing on protein-like (a potential marker faecal contamination, Kim 2024) humic-like characteristics. The system should efficient easy use researchers well participants citizen science programs. selection LEDs photodiodes optimized terms wavelength range power. A 275 nm emitting LED absorbance (measurement with 220-280 working photodiode) 345-450 photodiode). 370 (400-550 optical devices driven Arduino Nano. final probe (Fig. 1) fitted quartz windows protected copper-based wire mesh. will stand-alone mode (for long-term deployment) nomadic (connected case pH, conductivity temperature probes). Before finalizing 3D printing 1), test set-up produced, which can optimize pulse regime necessary accommodate heat LEDs, sensitivity device. controlled PC LabView program. Various model tryptophan other indole-based compounds, quinine sulfate, quinones were tested (pure mixtures) samples different aquatic ecosystems (surface impacted sources, effluents constructed wetlands, etc.). sensitive (fluorescence excitation at 270 nm), nm) humic acid (absorbance 2 Table 1). responses obtained compared data provided same

Язык: Английский

A low-cost dissolved organic matter probe for aquatic ecosystems DOI Open Access
Marie‐Noëlle Pons,

David Brunello,

J. T. Grissom

и другие.

ARPHA Conference Abstracts, Год журнала: 2025, Номер 8

Опубликована: Май 28, 2025

Naturally occurring dissolved organic matter (NDOM) is a complex, heterogeneous mixture of carbonaceous substances derived either from the excretions living organisms or natural processes decomposition and transformation residues (plants, animals, microorganisms). It plays crucial role in sequestration atmospheric carbon transport metals. Climate change, decrease acidification rivers lakes (Herreid et al. 2024), land-use change discharge anthropogenic are among factors leading to continuous evolution DOM water bodies thus modifying global cycle directly impacting resources such as those used for drinking production (Chen 2025). cannot be defined through specific chemical compounds considered supramolecular assembly small molecules sugars, tannins, proteins, lipids, etc. Optical methods UV-visible spectroscopy fluorescence commonly investigate molecular structural properties laboratories using benchtop devices. Our goal within TERRA FORMA project has been go further by developing an in-situ low-cost spectrometer that combines UV-Visible light absorption measurements analysis DOM, focusing on protein-like (a potential marker faecal contamination, Kim 2024) humic-like characteristics. The system should efficient easy use researchers well participants citizen science programs. selection LEDs photodiodes optimized terms wavelength range power. A 275 nm emitting LED absorbance (measurement with 220-280 working photodiode) 345-450 photodiode). 370 (400-550 optical devices driven Arduino Nano. final probe (Fig. 1) fitted quartz windows protected copper-based wire mesh. will stand-alone mode (for long-term deployment) nomadic (connected case pH, conductivity temperature probes). Before finalizing 3D printing 1), test set-up produced, which can optimize pulse regime necessary accommodate heat LEDs, sensitivity device. controlled PC LabView program. Various model tryptophan other indole-based compounds, quinine sulfate, quinones were tested (pure mixtures) samples different aquatic ecosystems (surface impacted sources, effluents constructed wetlands, etc.). sensitive (fluorescence excitation at 270 nm), nm) humic acid (absorbance 2 Table 1). responses obtained compared data provided same

Язык: Английский

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