Microplastice

Microplastice, commonly referred to as microplastics, are plastic particles typically smaller than 5 millimeters. They can be manufactured in small sizes (primary microplastics) or originate from the fragmentation of larger plastic items (secondary microplastics). The term also encompasses a range of sizes, with some definitions distinguishing nanoplastics as even smaller particles, often below 1 micrometer.

Common polymers found in microplastics include polyethylene, polypropylene, polystyrene, and polyvinyl chloride, among others. They enter the environment through multiple pathways, such as the shedding of synthetic fibers during washing, abrasion from tires, breakdown of plastic litter, and runoff from urban areas. Once released, microplastics are transported by wind and water, leading to widespread distribution in oceans, rivers, soils, and even the atmosphere.

Environmental and ecological impacts are the subject of ongoing study. Microplastics can be ingested by a wide range of organisms, from plankton to birds and marine mammals, potentially causing physical harm, reducing feeding efficiency, or altering behavior. They may also carry adsorbed chemicals or additives, posing chemical exposure risks. In humans, potential exposure occurs through seafood consumption, drinking water, and inhalation, but the health implications are not yet fully understood and remain a research priority.

Detection and measurement rely on laboratory techniques such as spectroscopy (FTIR, Raman) and various chemical analyses, often requiring careful contamination control. Regulatory responses include bans on microbeads in cosmetics, improvements in wastewater treatment, and broader efforts to reduce plastic waste and improve product stewardship. Ongoing research aims to standardize methods, quantify environmental loads, and clarify health risks.