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Rapid Sampling of Suspended and Floating Microplastics in Challenging Riverine and Coastal Water Environments in Japan
Water ( IF 3.4 ) Pub Date : 2020-07-03 , DOI: 10.3390/w12071903
Amila Abeynayaka , Fujio Kojima , Yoshikazu Miwa , Nobuhiro Ito , Yasuo Nihei , Yu Fukunaga , Yuga Yashima , Norihiro Itsubo

Environmental sampling plays an important role in quantitative and qualitative investigation of plastic pollution. Rivers are a major source, carrying plastic litter into the oceans. Microplastic sampling in riverine and coastal environments is often a challenging task due to limited access, time taken, costs, human resources, etc. Our present study evaluated the performance of newly developed sampling devices (Albatross Mark 5 and 6 (AM-5 and AM-6)) that were suitable to collect floating and suspended microplastic samples in challenging freshwater and coastal environments (95 locations). Our observations indicated a similar magnitude of microplastic concentrations with AM-5 and AM-6 sampling compared to conventional plankton nets. The sampling duration, originally 10–60 min (by plankton net), was reduced to 3 min (AM-5 and AM-6) for sampling water volumes of approximately 10 m3. The developed AM-6 device was used to collect samples from riverine and coastal environments in Japan. The microplastic particle polymer composition (using Fourier transform infrared spectrophotometry (FT-IR)), size, and shape (microscopic images) were investigated. The observations showed a statistically significant particle size reduction from the riverine to coastal areas. The dominant polymer types detected were polyethylene (PE) and polypropylene (PP). The observations were complied with the coastal microplastic observations that were reported for previous studies in Japanese water environments.

中文翻译:

日本具有挑战性的河流和沿海水环境中悬浮和漂浮的微塑料的快速采样

环境采样在塑料污染的定量和定性调查中起着重要作用。河流是一个主要来源,将塑料垃圾带入海洋。由于访问受限、耗时、成本、人力资源等原因,河流和沿海环境中的微塑料采样通常是一项具有挑战性的任务。我们目前的研究评估了新开发的采样设备(信天翁 Mark 5 和 6(AM-5 和 AM)的性能) -6)) 适合在具有挑战性的淡水和沿海环境(95 个地点)中收集漂浮和悬浮的微塑料样品。我们的观察表明,与传统浮游生物网相比,AM-5 和 AM-6 采样的微塑料浓度相似。采样持续时间,最初为 10-60 分钟(通过浮游生物网),减少到 3 分钟(AM-5 和 AM-6)以采样大约 10 立方米的水量。开发的 AM-6 设备用于从日本的河流和沿海环境中收集样本。研究了微塑料颗粒聚合物组合物(使用傅立叶变换红外分光光度法 (FT-IR))、尺寸和形状(显微图像)。观察结果显示,从河流到沿海地区,粒径在统计学上显着减少。检测到的主要聚合物类型是聚乙烯 (PE) 和聚丙烯 (PP)。这些观察结果符合先前在日本水环境中进行的研究报告的沿海微塑料观察结果。研究了微塑料颗粒聚合物组合物(使用傅立叶变换红外分光光度法 (FT-IR))、尺寸和形状(显微图像)。观察结果显示,从河流到沿海地区,粒径在统计学上显着减少。检测到的主要聚合物类型是聚乙烯 (PE) 和聚丙烯 (PP)。这些观察结果符合先前在日本水环境中进行的研究报告的沿海微塑料观察结果。研究了微塑料颗粒聚合物组合物(使用傅立叶变换红外分光光度法 (FT-IR))、尺寸和形状(显微图像)。观察结果显示,从河流到沿海地区,粒径在统计学上显着减少。检测到的主要聚合物类型是聚乙烯 (PE) 和聚丙烯 (PP)。这些观察结果符合先前在日本水环境中进行的研究报告的沿海微塑料观察结果。
更新日期:2020-07-03
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