Abstract Microplastic particles, often studied as aquatic pollutants, have been recovered from coastal dunes along the shores of Lake Ontario and Lake Erie in New York and Pennsylvania. Surface and shallow sub-surface sand samples were collected from coastal dunes in 1 m2 areas from 5 locations along Lake Erie: Sunset Bay, Dunkirk Harbor, Point Gratiot, and Canadaway Creek in New York and Presque Isle State Park Beach #11 in Pennsylvania. Samples were also collected from coastal dunes on Lake Ontario at Sandy Island Beach State Park, NY. Abundances, shapes, sizes, textures, and degradation of microplastics were characterized. Twenty-one of 26 samples yielded a variety of microplastics: pellets, fragments, and fibers. Larger microplastics (5.0–1.0 mm) were dominated by spheroidal and disk-shaped pellets with fewer fragments. Smaller microplastics (≤1.0 mm) were predominantly fibers and small fragments. Some microplastic particles exhibited evidence of degradation and weathering as a consequence of transport and exposure to the elements. The presence of microplastics in coastal dunes is attributable to aeolian transport from the adjacent beach.

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伊利湖和安大略湖沿岸沙丘中的微塑料污染物

摘要 通常作为水生污染物研究的微塑料颗粒已从安大略湖和纽约和宾夕法尼亚州伊利湖沿岸的沿海沙丘中回收。从伊利湖沿岸 5 个地点的 1 平方米区域的沿海沙丘收集表层和浅表层沙子样本：纽约的日落湾、敦刻尔克港、Point Gratiot 和 Canadaway Creek 以及宾夕法尼亚州的 Presque Isle State Park Beach #11。还从纽约州桑迪岛海滩州立公园安大略湖的沿海沙丘收集了样品。对微塑料的丰度、形状、大小、质地和降解进行了表征。26 个样品中有 21 个产生了各种微塑料：颗粒、碎片和纤维。较大的微塑料（5.0-1.0 毫米）主要是球状和盘状颗粒，碎片较少。较小的微塑料（≤1.0 毫米）主要是纤维和小碎片。由于运输和暴露在元素中，一些微塑料颗粒表现出降解和风化的迹象。沿海沙丘中微塑料的存在归因于邻近海滩的风沙迁移。