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Automated quantitative mineralogy and plastics – A new view of the plastic surface in aquatic environments
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Researchers applied automated quantitative mineralogy (AQM) to characterize the mineral-rich biofilm layer that colonizes plastic surfaces in aquatic environments, demonstrating this technique can reveal the complex inorganic-organic interface that mediates interactions between plastics and their surroundings.
Plastics are a ubiquitous pollutant, and are rapidly colonized by biofilms that sorb inorganic and organic components, forming the interface between plastics and the environment. This study provides a proof of concept for the use of automated quantitative mineralogy (AQM) to illuminate and analyse the metal and mineral component of the plastisphere on plastics sampled from temperate and tropical aquatic localities. The method is non-destructive and requires minimal sample preparation, providing a 2-dimensional visualisation and semi-quantitative analysis of the arrangement of biogenic and abiogenic components, highlighting potential interactions between these components. Our results also communicate the potential role of plastic structure on mineral retention in relation to environmental parameters that can influence mechanical degradation. AQM provides a novel avenue to understand the minerals associated with plastics, and increases our knowledge of the interfacial composition, which can inform potential interactions, transformations and insights into the long-term fate of plastic pollutants.
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Automated scanning electron microscopy with energy-dispersive X-ray analysis was adapted as a rapid screening method for detecting and characterizing microplastic particles in environmental samples. The method simultaneously identifies particle chemistry, size, and shape without hazardous chemicals. This approach offers a faster and less labor-intensive alternative to traditional microplastic analysis techniques.
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Nanoplastic transport in aqueous environments: The role of chemo-electric properties and hydrodynamic forces for nanoplastic-mineral interaction.
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This study examined how the physicochemical properties of nanoplastics and hydrodynamic forces govern their interaction with mineral surfaces in aquatic environments. The findings characterize transport and fate behavior of nanoplastics as they move through different environmental compartments.
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A new procedure combining ultra-high resolution microscopy and spectroscopy was developed to simultaneously characterize micro- and nanoplastics and identify contaminants adsorbed to their surfaces in aquatic samples. The method enables more comprehensive analysis of the complex pollutant mixtures associated with environmental microplastic particles.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.