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Monitorization of polyamide microplastics weathering using attenuated total reflectance and microreflectance infrared spectrometry

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 2021 48 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Borja Ferreiro, J.M. Andrade, J.M. Andrade, J.M. Andrade, Borja Ferreiro, Verónica Fernández‐González, Borja Ferreiro, Borja Ferreiro, Borja Ferreiro, Verónica Fernández‐González, Verónica Fernández‐González, Borja Ferreiro, Borja Ferreiro, Borja Ferreiro, J.M. Andrade, J.M. Andrade, J.M. Andrade, Borja Ferreiro, Borja Ferreiro, J.M. Andrade, Borja Ferreiro, J.M. Andrade, Soledad Muniategui‐Lorenzo Verónica Fernández‐González, Verónica Fernández‐González, Borja Ferreiro, J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, Borja Ferreiro, Borja Ferreiro, J.M. Andrade, Borja Ferreiro, J.M. Andrade, J.M. Andrade, Soledad Muniategui‐Lorenzo Borja Ferreiro, Borja Ferreiro, Borja Ferreiro, Borja Ferreiro, Purificación López‐Mahía, Borja Ferreiro, Borja Ferreiro, Verónica Fernández‐González, Verónica Fernández‐González, Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo J.M. Andrade, J.M. Andrade, J.M. Andrade, Borja Ferreiro, Borja Ferreiro, Borja Ferreiro, Purificación López‐Mahía, Verónica Fernández‐González, Purificación López‐Mahía, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo J.M. Andrade, Verónica Fernández‐González, J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Verónica Fernández‐González, J.M. Andrade, Verónica Fernández‐González, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Verónica Fernández‐González, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Verónica Fernández‐González, Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo J.M. Andrade, J.M. Andrade, Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo J.M. Andrade, Soledad Muniategui‐Lorenzo J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Verónica Fernández‐González, J.M. Andrade, Soledad Muniategui‐Lorenzo

Summary

Researchers monitored the weathering of polyamide (nylon) microplastics using attenuated total reflectance and microreflectance infrared spectrometry, finding that natural aging produces spectral changes that can make weathered plastics difficult to identify against standard reference databases.

Polymers
PA nylon

The EU goal to reduce marine plastic litter by ca. 30% by 2020 stressed the need to deploy analytical methods to ascertain the polymeric nature of a residue. Furthermore, as plastics age under natural conditions and usual databases do not include their weathered spectra, (micro)plastics in environmental samples may be unidentified. In this paper, polyamide (nylon) microplastics weathering was monitored because of its ubiquity in household commodities, clothes, fishery items and industry, whose residues end up frequently in the environment. Infrared spectra (ATR and microreflectance) and Scanning Electron Microscopy (SEM) images were collected periodically while exposing nylon to controlled weathering. It was seen that ATR was more sensitive than microreflectance to monitor the structural evolution of polyamide and that the spectra and the surface of weathered microplastics showed remarkable differences with the pristine material, which stresses the need for considering its evolution when identifying microplastics in environmental studies. The evolution of six band ratios related to the chemical evolution of this polymer are presented. SEM images revealed the formation of secondary microplastics at the most advanced weathering stages of polyamide.

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