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A reliable method to determine airborne microplastics using quantum cascade laser infrared spectrometry.
López-Rosales, Adrián; Ferreiro, Borja; Andrade, José; Fernández-Amado, María; González-Pleiter, Miguel; López-Mahía, Purificación; Rosal, Roberto; Muniategui-Lorenzo, Soledad.
Afiliación
  • López-Rosales A; Group of Applied Analytical Chemistry, University Institute of Environment, Universidade da Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain.
  • Ferreiro B; Group of Applied Analytical Chemistry, University Institute of Environment, Universidade da Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain.
  • Andrade J; Group of Applied Analytical Chemistry, University Institute of Environment, Universidade da Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain.
  • Fernández-Amado M; Group of Applied Analytical Chemistry, University Institute of Environment, Universidade da Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain.
  • González-Pleiter M; Department of Biology, Faculty of Science, Universidad Autónoma de Madrid, E-28049, Madrid, Spain.
  • López-Mahía P; Group of Applied Analytical Chemistry, University Institute of Environment, Universidade da Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain.
  • Rosal R; Department of Chemical Engineering, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.
  • Muniategui-Lorenzo S; Group of Applied Analytical Chemistry, University Institute of Environment, Universidade da Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain. Electronic address: soledad.muniategui@udc.es.
Sci Total Environ ; 913: 169678, 2024 Feb 25.
Article en En | MEDLINE | ID: mdl-38159775
ABSTRACT
The number of studies dealing with airborne microplastics (MPs) is increasing but sampling and sample treatment are not standardized, yet. Here, a fast and reliable method to characterize MPs is presented. It involves the study of two passive sampling devices to collect atmospheric bulk deposition (wet and dry deposition) and three digestion methods (two alkaline-oxidative and an oxidative) to treat the samples. The alkaline-oxidative method based on KOH and NaClO was selected for a mild organic matrix digestion. In addition, some operational parameters of a high-throughput quantum cascade laser-based infrared device (LDIR) were optimized an effective automatic tiered approach to differentiate fibres from particles (>90 % success in validation) and a criterion to establish positive matches when comparing an unknown spectrum against the spectral database (proposed match index > 0.85). The procedural analytical recoveries were very good for particles (82-90 %) and slightly lower for fibres (62-73 %). Finally, the amount and type of MPs deposited at a sub-urban area NW Spain were evaluated. Most common polymers were Polyethylene (PE), Polypropylene (PP) and Polyethylene terephthalate (PET). The deposition rates ranged 98-1220 MP/m2/day, ca. 1.7 % of the total collected particles. More than 50 % of the total MPs deposited were in the 20-50 µm size range, whereas fibres were mostly in the 50-500 µm size range.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos
Texto completo
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Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos