Archives of Environmental Contamination and Toxicology ( IF 3.7 ) Pub Date : 2021-03-12 , DOI: 10.1007/s00244-021-00821-7 Nicolas Briant 1 , Pauline Le Monier 1 , Sandrine Bruzac 1 , Teddy Sireau 1 , Daniel F Araújo 1 , Anne Grouhel 2
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Abstract
Rare earth elements (REE) are becoming an environmental pollutant of emerging concern, linked to their use in various anthropic processes. Because REE bioconcentrate in marine organisms throughout their food webs, a better understanding of biogeochemical processes leading to REE concentrations found in coastal species is necessary. This study was designed to assess REEs concentrations in various common bivalves from the French coastline to identify possible geographic, taxonomic, or temporal variations of concentrations. Based on the French Mussel Watch program, three species of bivalves (oyster Crassostrea gigas and mussels Mytilus edulis and Mytilus galloprovincialis) were collected all along the French metropolitan coast and soft tissues were analyzed for REE concentrations. Results have shown higher REE concentrations in bivalve soft tissues near estuaries without taxonomic nor national geographic differences. The highest levels have been observed in the Gironde estuary with total REE concentrations (∑REE) in oysters up to 10.94 µg g−1 d.w. The REE distribution pattern in both mussel species described a particle-like (inverse V-shape) pattern, whereas C. gigas REE distribution pattern changes from a particle-like to a dissolved-like pattern with a heavy REE (HREE) enrichment. However, no environmental parameter could be linked to these pattern changes. Finally, neither Gd anomalies nor an evolution of REE concentrations over a 30-year period have been detected in bivalves’ soft tissues.
Graphic Abstract
中文翻译：
法国大都会海岸双壳类软组织中的稀土元素：时空分布
摘要
稀土元素 (REE) 正在成为一种新出现的环境污染物，这与它们在各种人类活动过程中的使用有关。由于海洋生物的整个食物链中 REE 生物浓缩，因此有必要更好地了解导致沿海物种中 REE 浓度的生物地球化学过程。本研究旨在评估法国海岸线各种常见双壳类动物的 REE 浓度，以确定浓度的可能地理、分类或时间变化。根据法国贻贝观察计划，三种双壳类动物（牡蛎Crassostrea gigas和贻贝Mytilus edulis和Mytilus galloprovincialis) 沿法国大都会海岸收集，并分析了软组织的 REE 浓度。结果表明，在没有分类学或国家地理差异的情况下，河口附近的双壳类软组织中的 REE 浓度较高。在 Gironde 河口观察到最高水平，牡蛎中的总稀土元素浓度 (∑REE) 高达 10.94 µg -1 dw C. gigasREE 分布模式从颗粒状变为溶解状，并具有重 REE (HREE) 富集。然而，没有任何环境参数可以与这些模式变化相关联。最后，在双壳类动物的软组织中既没有检测到 Gd 异常，也没有检测到 30 年间 REE 浓度的变化。
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