Department of Civil and Environmental Engineering Sciences, Institute IWAR, Chair of Wastewater Engineering, Technical University of Darmstadt, Germany.
Department of Civil and Environmental Engineering Sciences, Institute IWAR, Chair of Wastewater Engineering, Technical University of Darmstadt, Germany.
Chemosphere. 2020 Nov;258:127388. doi: 10.1016/j.chemosphere.2020.127388. Epub 2020 Jun 17.
Microplastics enter natural water bodies by a variety of pathways, one of them being wastewater streams. The role of industrial wastewater in overall microplastic emissions has so far only been estimated, because access is usually restricted. This is the first report providing quantitative data on microplastics in industrial wastewaters. The wastewater discharge of three different industrial sites was sampled in the size ranges of small microplastics (10-1000 μm) and large microplastics (1000-5000 μm). Differential scanning calorimetry (DSC) was used to detect and quantify semi-crystalline thermoplastics. Polyethylene (PE) and polypropylene (PP) were the most abundant polymers, but polyamide (PA) and polyethylene terephthalate (PET) were also found. As all three industrial sites had wastewater treatment plants (WWTP), the total concentrations were in the μg L range, comparable to organic micropollutants in municipal WWTP effluents. At one industrial site, the removal capacity of the WWTP was evaluated by sampling and analyzing the influent as well as the effluent. The total microplastics concentration in the influent was in the g L range, yielding a removal capacity of the industrial WWTP of >99.99 %.
微塑料通过多种途径进入自然水体，其中之一是废水。工业废水在总微塑料排放中的作用迄今只是被估算，因为通常受限进入。这是首次提供工业废水中微塑料定量数据的报告。对三个不同工业场地的废水排放进行了采样，范围是小尺寸微塑料（10-1000μm）和大尺寸微塑料（1000-5000μm）。差示扫描量热法（DSC）用于检测和量化半结晶热塑性塑料。聚乙烯（PE）和聚丙烯（PP）是最丰富的聚合物，但也发现了聚酰胺（PA）和聚对苯二甲酸乙二醇酯（PET）。由于所有三个工业场地都有废水处理厂（WWTP），总浓度在μg L 范围内，与市政 WWTP 废水流出物中的有机微污染物相当。在一个工业场地，通过采样和分析进水以及出水，评估了 WWTP 的去除能力。进水的总微塑料浓度在 g L 范围内，工业 WWTP 的去除率>99.99%。
