Abstract The occurrence of nanoplastics in the environment is now known and presents new threats linked to plastic debris issues. New questions about the formation pathways and life cycle assessment of nanoplastics in continental and marine environments have been raised. In the present study, we focused on the Guadeloupe island coastal system. For the first time, we demonstrated the presence of nanoplastics in sand water extracts (SWEs). We also investigated the potential of rare earth elements (REE) in tracing nanoplastics. Based on the REE patterns of SWEs, beached plastics and modern corals, we demonstrated that nanoplastics are important components in the REE signature of coastal sand (29 to 73%). These original results demonstrate the relevance of developing geochemical tracers for determining the fate of missing plastic litter.

中文翻译：

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暴露于北大西洋环流的海岸上的纳米塑料：证据和可追溯性

摘要 纳米塑料在环境中的存在现已为人所知，并提出了与塑料碎片问题相关的新威胁。提出了有关大陆和海洋环境中纳米塑料的形成途径和生命周期评估的新问题。在本研究中，我们重点关注瓜德罗普岛海岸系统。我们首次证明了在沙水提取物 (SWE) 中存在纳米塑料。我们还研究了稀土元素 (REE) 在追踪纳米塑料方面的潜力。基于 SWE、搁浅塑料和现代珊瑚的 REE 模式，我们证明纳米塑料是沿海砂 REE 特征的重要组成部分（29% 至 73%）。这些原始结果证明了开发地球化学示踪剂对于确定丢失塑料垃圾的命运的相关性。