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Microplásticos en tres playas del corredor turístico del norte, Piura, Perú
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Researchers estimated the abundance, characteristics, and types of microplastics on three beaches along the northern tourist corridor of Piura, Peru, characterising the size, colour, and polymer types of particles found in beach sediments to assess contamination levels in this coastal region.
El objetivo de este estudio fue estimar la abundancia, características y tipos de microplásticos (MPs) en tres playas del corredor turístico del norte (playas Pariñas, Lobitos y Los Órganos), Piura, Perú en Febrero del 2024. En cada playa se recolectaron muestras de sedimento en la zona litoral (supralitoral: S e infralitoral: I) y sedimento de fondo marino (FM1, FM2 y FM3). Se analizaron las muestras de sedimento siguiendo los protocolos estandarizados. Los resultados muestran la abundancia (ítems/kg) de MPs en zona litoral y fondo marino en playa Pariñas (S=380±280.48, I=152±67.46, FM1=240±40, FM2=186.67±83.27 y FM3=200±105.83), Lobitos (S=220±226.47, I=208±120.44, FM1=200±40, FM2=440±183.3 y FM3=186.67±61.1) y Los Órganos (S= 588±445.4, I=160±92.4, FM1=80±40, FM2=80±40 y FM3=93.33±61.1). Las características predominantes de MPs en sedimento de fondo marino y de sedimento de zona litoral de las playas Pariñas, Lobitos y Los Órganos, fueron de tamaño 20 µm a 1 mm, forma fibra y colores negro y azul, con excepción en sedimento de fondo marino de playa Los Órganos con color transparente como predominante. Además, mediante espectroscopía de Raman se identificaron ítems de poliestireno (PS), polipropileno (PP) y fibra de carbono (FC). Por lo tanto, se concluye que la abundancia de microplásticos es mayor en zona supralitoral que infralitoral en playas Pariñas y Lobitos, a excepción de Lobitos que presentó igual concentración. En sedimento de fondo marino para cada una las tres playas, hubo igual abundancia de microplásticos entre sitios FM1, FM2 y FM3, el cual refleja la contaminación por micropásticos de dichas playas.
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