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Temporal and spatial variations of microplastics in roadside dust from rural and urban Victoria, Australia: Implications for diffuse pollution.
Chemosphere ( IF 8.1 ) Pub Date : 2020-03-27 , DOI: 10.1016/j.chemosphere.2020.126567 Lei Su 1 , Bingxu Nan 2 , Nicholas J Craig 2 , Vincent Pettigrove 3
Chemosphere ( IF 8.1 ) Pub Date : 2020-03-27 , DOI: 10.1016/j.chemosphere.2020.126567 Lei Su 1 , Bingxu Nan 2 , Nicholas J Craig 2 , Vincent Pettigrove 3
Affiliation
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Microplastic pollution is an important issue for environmental management as their ubiquity in marine and freshwaters has been confirmed. Pollution sources are key to understanding how microplastics travel from land to open oceans. Given that information regarding microplastic transport from diffuse sources is limiting, we conducted a study on roadside dust from rural and urban Victoria, Australia, over two seasons. Any deposited fugitive dust and particulate matter may also be present in our samples. The average microplastic abundance over two seasons ranged from 20.6 to 529.3 items/kg (dry weight based), with a predominant portion of fibers and items less than 1 mm. Polyester and polypropylene were the dominant polymer types (26%) while cotton and cellulose were the most common non-plastic items (27%). Sampling sites displayed consistent microplastic abundances over time and shared similar patterns in size, shape and polymer composition. Multiple correlation and principal component analysis suggest that urbanization and rainfall are important influences to roadside microplastic accumulation. The observed microplastic hotspots were generally located within close vicinity of areas where urban intensive land use and regional population sizes are high. Microplastics accumulated on roads and road verges during periods of dry weather and were flushed away during heavy storms while the corresponding trigger value was unknown. Monitoring roadside dust can be considered as an initial and cost-effective screening of microplastic pollution in urban areas. Further efforts should be made to optimize the methodologies and we advocate prolonged sampling schemes for roadside dust monitoring.
中文翻译：
澳大利亚维多利亚州和城市郊区路边灰尘中的微塑料的时空变化：对弥漫性污染的影响。
由于已经确认了其在海洋和淡水中的普遍存在，因此微塑料污染对于环境管理而言是一个重要问题。污染源是了解微塑料如何从陆地传播到大洋的关键。鉴于有关来自弥散源的微量塑料运输的信息有限，我们在两个季节内对来自澳大利亚维多利亚和乡村的路边灰尘进行了研究。我们的样品中也可能存在任何沉积的扬尘和颗粒物。两个季节的平均微塑性丰度范围为20.6至529.3物品/千克（基于干重），其中大部分纤维和物品少于1毫米。聚酯和聚丙烯是主要的聚合物类型（26％），而棉和纤维素是最常见的非塑料产品（27％）。采样点随时间显示一致的微塑性丰度，并且在尺寸，形状和聚合物组成方面具有相似的模式。多元相关和主成分分析表明，城市化和降雨对路边微塑料的积累具有重要影响。观察到的微塑性热点通常位于城市密集型土地利用和区域人口规模较大的地区附近。在干燥天气期间，道路上的微塑料积聚在道路和道路边缘，在暴风雨期间被冲走，而相应的触发值未知。监测路边灰尘可以看作是对城市地区微塑料污染的初步且具有成本效益的筛查。
更新日期：2020-03-27
中文翻译：
澳大利亚维多利亚州和城市郊区路边灰尘中的微塑料的时空变化：对弥漫性污染的影响。
由于已经确认了其在海洋和淡水中的普遍存在，因此微塑料污染对于环境管理而言是一个重要问题。污染源是了解微塑料如何从陆地传播到大洋的关键。鉴于有关来自弥散源的微量塑料运输的信息有限，我们在两个季节内对来自澳大利亚维多利亚和乡村的路边灰尘进行了研究。我们的样品中也可能存在任何沉积的扬尘和颗粒物。两个季节的平均微塑性丰度范围为20.6至529.3物品/千克（基于干重），其中大部分纤维和物品少于1毫米。聚酯和聚丙烯是主要的聚合物类型（26％），而棉和纤维素是最常见的非塑料产品（27％）。采样点随时间显示一致的微塑性丰度，并且在尺寸，形状和聚合物组成方面具有相似的模式。多元相关和主成分分析表明，城市化和降雨对路边微塑料的积累具有重要影响。观察到的微塑性热点通常位于城市密集型土地利用和区域人口规模较大的地区附近。在干燥天气期间，道路上的微塑料积聚在道路和道路边缘，在暴风雨期间被冲走，而相应的触发值未知。监测路边灰尘可以看作是对城市地区微塑料污染的初步且具有成本效益的筛查。
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