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Compositions and sources of plastic debris and microplastics in different sizes from the Sanggou bay beaches, Yellow Sea, China
Original title: Compositions and sources of plastic debris and microplastics in different sizes from the Sanggou bay beaches, Yellow Sea, China
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This Chinese-language study investigated plastic debris and microplastic composition, abundance, and sources at seven tidal flat beaches in Sanggou Bay on the Yellow Sea, finding that polystyrene foam and aquaculture-related plastics dominated. Microplastic abundance increased by 2–4 orders of magnitude as plastic size decreased, and the close correlation between 1–5 mm microplastic and 5 mm–2.5 cm litter abundance confirmed fragmentation of aquaculture materials as a primary source.
海岸带潮滩中微塑料来源复杂,大块塑料在物理、化学、生物等作用下的破碎是潮滩微塑料的主要来源之一。本研究调查了黄海桑沟湾7个潮滩中不同尺寸塑料垃圾的组成、丰度以及微塑料的形状、颜色、成分等,并通过定性和定量的方式研究塑料垃圾破碎与微塑料的关系以识别微塑料来源。结果表明,聚苯乙烯泡沫在5 mm~2.5 cm、1~5 mm与 2.5 cm的塑料样品中,与养殖相关的塑料占76%;塑料垃圾和微塑料的总体丰度随着尺寸的减小而增加2~4个数量级。1~5 mm的微塑料丰度与5 mm~2.5 cm的塑料垃圾丰度具有显著相关性。通过对比不同尺寸塑料垃圾与微塑料的形态和成分特征,识别出潮滩中的微塑料主要是由聚苯乙烯泡沫、聚乙烯浮子、黄色海绵、纤维渔绳以及聚丙烯绳等破碎形成,表明养殖活动是桑沟湾潮滩塑料垃圾及微塑料的重要来源。未来需进一步探索微塑料来源的鉴别方法,寻找识别微塑料来源的新证据。
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