School of Agriculture and Environment, University of Western Australia, Crawley, WA 6009, Australia.
School of Agriculture and Environment, University of Western Australia, Crawley, WA 6009, Australia.
Mar Pollut Bull. 2021 Jul;168:112362. doi: 10.1016/j.marpolbul.2021.112362. Epub 2021 May 18.
Stormwater drains are important sinks for microplastics and potentially aid the transport of microplastics from terrestrial to marine environments. Samples were collected from sediments in five stormwater drainage systems with different land uses, area, population, and sediment characteristics. Microplastic concentrations within the drainage network varied between 0 and 3500 microplastics per kg of dry sediment, with a mean concentration of 664 particles per kg. The majority of microplastics found were fibres. Polyethylene and polypropylene were the dominant polymer types (μ-FTIR). Based on a Generalized Linear Mixed Model, the expected number of microplastics for a representative urban drain was 760 particles per kg, with 245 particles per kg expected for an agricultural drain. Sediment grain size was a predictor for microplastic abundance, with sandier sediments containing more microplastics. This study is the first to quantify microplastic pollution in stormwater drainage systems in Western Australia.
雨水排水系统是微塑料的重要汇，并且可能有助于微塑料从陆地环境向海洋环境的输送。从五个具有不同土地利用、面积、人口和沉积物特征的雨水排水系统中的沉积物中采集了样本。排水网络内的微塑料浓度在每公斤干沉积物 0 至 3500 个微塑料之间变化，平均浓度为每公斤 664 个颗粒。发现的大多数微塑料是纤维。聚乙烯和聚丙烯是主要的聚合物类型（μ-FTIR）。根据广义线性混合模型，代表性城市排水系统中的微塑料数量预计为每公斤 760 个颗粒，农业排水系统中每公斤预计有 245 个颗粒。沉积物粒径是微塑料丰度的预测因子，沙质沉积物含有更多的微塑料。这项研究首次在西澳大利亚量化了雨水排水系统中的微塑料污染。
