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Transport and characterization of microplastics in inland waterways
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2020-09-21 , DOI: 10.1016/j.jwpe.2020.101640
Nicholas D. Christensen , Catherine E. Wisinger , Leslie A. Maynard , Natasha Chauhan , John T. Schubert , Jonathan A. Czuba , Justin R. Barone

Microplastic pollution in floodplains and river channels in 14 locations at six sites along three rivers in Virginia was measured to test the hypotheses that microplastics concentrate in floodplains, exist as larger aggregates with other natural and synthetic particles, and may be different than ocean microplastics. The results show that (1) microplastic concentrations were generally just as high or higher in the floodplain than in the stream channel, (2) microplastics aggregated with natural sediment particles into the “heteroaggregates” predicted theoretically, (3) microplastics were larger in the floodplain than in the stream channel with a wider particle size distribution, (4) microplastic particles were 80 % fragments, 15 % spherical particles, and 5% fibers, and (5) chemically identified microplastics were composed of common packaging plastics that were heavily oxidized or hydrolyzed. The shape and chemical compositions of microplastic particles found was very similar to those observed in and around other rivers studied in the literature but different from the ocean environment. The floodplain could be used to capture river microplastics.



中文翻译:

内陆水道中微塑料的运输和表征

测量了弗吉尼亚州三条河流沿线六个地点的14个地点的漫滩和河道中的微塑性污染,以检验以下假设:微塑性集中在漫滩中,与其他天然和合成颗粒以较大的聚集体形式存在,并且可能与海洋微塑性不同。结果表明:(1)泛滥平原中的微塑料浓度通常与河道中的高或高,(2)与天然沉积物颗粒聚集在一起的微塑料在理论上预测为“杂聚集体”,(3)在河床中的微塑料较大。洪泛区比流道中的粒径分布更宽,(4)微塑性颗粒为80%的碎片,15%的球形颗粒和5%的纤维,(5)化学鉴定的微塑料由被严重氧化或水解的普通包装塑料组成。发现的微塑料颗粒的形状和化学组成与文献中研究的其他河流及其周围地区观察到的非常相似,但与海洋环境不同。洪泛区可用于捕获河流微塑料。

更新日期:2020-09-22
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