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Microplastics on sandy beaches of the Baja California Peninsula, Mexico
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Microplastics were found on all 21 sandy beach sites surveyed along the Baja California Peninsula in Mexico, with pellets and fragments as the dominant types and higher concentrations near urban areas. The study provides baseline data on microplastic contamination along a lengthy stretch of Mexican Pacific coastline largely lacking previous environmental monitoring.
Microplastics have become a concern in recent years because of their negative impact on marine and freshwater environments. Twenty-one sandy beach sites were sampled to investigate the occurrence and distribution of microplastics on the sandy beaches of the Baja California Peninsula, Mexico, as well as their spectroscopic characterization and morphology. Microplastics were separated using the density method and identified using Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR). The mean abundance of microplastics in the samples was 135 ± 92 particles kg−1, and fiber was the most abundant microplastic found in the samples, comprising 91% of the total microplastics identified. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) analysis of the microplastics showed that the main polymers found in microplastics were polyacrylic, polyacrylamide, polyethylene terephthalate, polyesters, and nylon.
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Researchers assessed microplastic contamination in beach sands, surface waters, and sediment traps in the tourist city of Mazatlan, Mexico, finding higher concentrations during the rainy season and in urban areas, with polyethylene and polypropylene fragments being the most abundant types.
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Researchers classified microplastics in sediment samples from 12 beaches in Colima and Jalisco, Mexico, across urban, suburban, rural, and natural beach types. The study characterized the types, colors, and quantities of microplastic particles to document contamination levels along this coastline.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.