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A reliable procedure to obtain environmentally relevant nanoplastic proxies
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2021-09-28 , DOI: 10.1039/d1en00395j Florent Blancho 1 , Mélanie Davranche 1 , Francesco Fumagalli 2 , Giacomo Ceccone 2 , Julien Gigault 3
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2021-09-28 , DOI: 10.1039/d1en00395j Florent Blancho 1 , Mélanie Davranche 1 , Francesco Fumagalli 2 , Giacomo Ceccone 2 , Julien Gigault 3
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More environmentally relevant nanoplastic models are urgently needed. Models of environmental plastics are used to develop analytical methods to get an accurate picture of how nanoplastics behave in natural systems, and to generate data on nanoplastics' environmental fate and impact on living organisms. Despite the recent progress in developing models to mimic nanoplastics, the models that are available do not yet show enough diversity to represent the wide heterogeneity in the physical and chemical properties of environmental nanoplastics. In this paper, we report on the strategy we developed to obtain environmentally relevant nanoplastics by mechanical abrasion and sonication of weathered plastics collected from the natural environment (on the beach, and floating in the water). An organic matter degradation protocol was devised to eliminate any potential organic residues that were initially present on the collected plastic samples. The final nanoplastic suspension contains an average of 400 mg carbon L−1, allowing the surface properties to be characterized by XPS, BET analysis, and potentiometric titration. The size distribution of nanoplastics ranges from 200 to 500 nm, with a heterogenous shape and composition (polyethylene or polypropylene) similar to the nanoplastics observed in marine, coastline, and soil systems.
中文翻译：
获得与环境相关的纳米塑料代理的可靠程序
迫切需要更多与环境相关的纳米塑料模型。环境塑料模型用于开发分析方法，以准确了解纳米塑料在自然系统中的行为，并生成有关纳米塑料的环境归宿和对生物体影响的数据。尽管最近在开发模拟纳米塑料的模型方面取得了进展，但可用的模型还没有表现出足够的多样性来代表环境纳米塑料物理和化学特性的广泛异质性。在本文中，我们报告了我们开发的通过机械磨损和超声处理从自然环境（在海滩上和漂浮在水中）收集的风化塑料来获得与环境相关的纳米塑料的策略。设计了有机物降解方案以消除最初存在于收集的塑料样品上的任何潜在有机残留物。最终的纳米塑料悬浮液平均含有 400 毫克碳 L-1，允许通过 XPS、BET 分析和电位滴定来表征表面特性。纳米塑料的尺寸分布范围为 200 至 500 nm，具有与在海洋、海岸线和土壤系统中观察到的纳米塑料相似的异质形状和成分（聚乙烯或聚丙烯）。
更新日期：2021-10-06
中文翻译：
获得与环境相关的纳米塑料代理的可靠程序
迫切需要更多与环境相关的纳米塑料模型。环境塑料模型用于开发分析方法，以准确了解纳米塑料在自然系统中的行为，并生成有关纳米塑料的环境归宿和对生物体影响的数据。尽管最近在开发模拟纳米塑料的模型方面取得了进展，但可用的模型还没有表现出足够的多样性来代表环境纳米塑料物理和化学特性的广泛异质性。在本文中，我们报告了我们开发的通过机械磨损和超声处理从自然环境（在海滩上和漂浮在水中）收集的风化塑料来获得与环境相关的纳米塑料的策略。设计了有机物降解方案以消除最初存在于收集的塑料样品上的任何潜在有机残留物。最终的纳米塑料悬浮液平均含有 400 毫克碳 L-1，允许通过 XPS、BET 分析和电位滴定来表征表面特性。纳米塑料的尺寸分布范围为 200 至 500 nm，具有与在海洋、海岸线和土壤系统中观察到的纳米塑料相似的异质形状和成分（聚乙烯或聚丙烯）。
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