μ-FTIR Reflectance Spectroscopy Coupled with Multivariate Analysis: A Rapid and Robust Method for Identifying the Extent of Photodegradation on Microplastics DOI Creative Commons
Eleonora Conterosito, Maddalena Roncoli, C Ivaldi

et al.

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

Published: Feb. 6, 2025

Understanding the origins of microplastics (MPs) and evaluating consequences plastic pollution require precise chemical information. Moreover, MPs undergo changes due to photoaging, which are worth investigating since they can influence effects on living beings environment. Micro-Fourier-transform infrared (μ-FTIR) spectroscopy is a key technique for screening MPs, combining optical imaging with information from IR spectra. While reflectance μ-FTIR spectroscopy's sensitivity particle thickness photodegradation complicates automated spectral matching, it provide valuable if coupled multivariate analysis data. This study developed robust method identifying even when modified by photodegradation. Various acquisition methods (ATR-IR μ-transflectance-IR), data pretreatments, set procedures were examined, critical aspects addressed. The proposed method, using μ-TR-IR principal component (PCA), proved effective classifying analyzing their degradation, offering increased faster workflow compared manual comparison. showed earlier in relevant bands, indicating higher degradation than ATR-IR spectroscopy. Despite notorious issue artifacts, our results suggest that be collected without sophisticated preprocessing techniques. On contrary, presence artifacts allows extracting some particles' thickness. Finally, PCA successfully validated polymer classification reliability test carboxyl index (CI) validate ability assess degradation. CI most diffused parameter PCA, considers entire spectrum does not rely integration single peaks, inherently more take into account multiple mechanisms.

Language: Английский

Birds as Bioindicators: Revealing the Widespread Impact of Microplastics DOI Creative Commons
Lara Carrasco Pesquera,

Eva Jiménez-Mora,

Maria Jose Utrilla

et al.

Birds, Journal Year: 2025, Volume and Issue: 6(1), P. 10 - 10

Published: Feb. 11, 2025

The global crisis of plastic pollution, particularly involving microplastics (MPs) and nanoplastics (NPs), has profound ecological implications. Birds, serving as bioindicators, are especially susceptible to these pollutants. This systematic review synthesizes the current research on presence, distribution, impact MPs NPs avian species, alongside advancements in detection methodologies. have been identified over 200 bird species across 46 families, encompassing several ecosystems, from Antarctica Labrador, including Australia, China, South Europe. Seabirds such penguins, gulls, shearwaters exhibit a high burden tissues feces due fishing debris, while terrestrial face contamination urban agricultural sources. Depending their composition, can cause gastrointestinal damage, oxidative stress, bioaccumulation toxic chemicals, polyethylene polypropylene. However, challenges persist methodological inconsistencies, though advances spectroscopy flow cytometry offer improved accuracy. Addressing this pollution is vital for conservation ecosystem health, requiring international collaboration standardized protocols.

Language: Английский

Citations

1
A critical review of the ecotoxic effects of microplastics on aquatic, soil and atmospheric ecosystems and current research challenges DOI
Haitao Yang, Shuyan Niu,

Menghao Guo

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: 274, P. 121361 - 121361

Published: March 9, 2025

Language: Английский

Citations

1
μ-FTIR Reflectance Spectroscopy Coupled with Multivariate Analysis: A Rapid and Robust Method for Identifying the Extent of Photodegradation on Microplastics DOI Creative Commons
Eleonora Conterosito, Maddalena Roncoli, C Ivaldi

et al.

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

Published: Feb. 6, 2025

Understanding the origins of microplastics (MPs) and evaluating consequences plastic pollution require precise chemical information. Moreover, MPs undergo changes due to photoaging, which are worth investigating since they can influence effects on living beings environment. Micro-Fourier-transform infrared (μ-FTIR) spectroscopy is a key technique for screening MPs, combining optical imaging with information from IR spectra. While reflectance μ-FTIR spectroscopy's sensitivity particle thickness photodegradation complicates automated spectral matching, it provide valuable if coupled multivariate analysis data. This study developed robust method identifying even when modified by photodegradation. Various acquisition methods (ATR-IR μ-transflectance-IR), data pretreatments, set procedures were examined, critical aspects addressed. The proposed method, using μ-TR-IR principal component (PCA), proved effective classifying analyzing their degradation, offering increased faster workflow compared manual comparison. showed earlier in relevant bands, indicating higher degradation than ATR-IR spectroscopy. Despite notorious issue artifacts, our results suggest that be collected without sophisticated preprocessing techniques. On contrary, presence artifacts allows extracting some particles' thickness. Finally, PCA successfully validated polymer classification reliability test carboxyl index (CI) validate ability assess degradation. CI most diffused parameter PCA, considers entire spectrum does not rely integration single peaks, inherently more take into account multiple mechanisms.

Language: Английский

Citations

0