van 't Hoff Institute for Molecular Sciences (HIMS), Universiteit van Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands.
Avantium Support BV, Zekeringstraat 29, 1014BV Amsterdam, the Netherlands.
Sci Total Environ. 2023 Jan 20;857(Pt 2):159209. doi: 10.1016/j.scitotenv.2022.159209. Epub 2022 Oct 4.
Concerns about impact of small plastic particles, known as microplastics (<5 mm) and nanoplastics (<1 μm), together abbreviated as MNP, on the environment and on human health have increased in recent years. Polyethylene terephthalate (PET) microplastics have been detected previously in different environmental samples including freshwater and wastewater sludge. In the present study, we target all small plastic particles of PET with a diameter smaller than 5 mm ('PET MNP'). A simple three-step method of drying, (in matrix) PET depolymerization in ethylene glycol and liquid chromatography-mass spectrometry (LC-MS) analysis, was applied for the quantification of PET MNP in influents and effluents collected from ten Dutch wastewater treatment plants. The PET recovery was 98 % in the wastewater matrix. The limits of detection (LOD) for PET in influents and effluents were 2.0 μg/L and 1.2 μg/L, respectively. PET MNP was detected in all the influents (ranging from 24.9 μg/L to 680 μg/L) and most of the effluents (ranging from <LOD to 23.1 μg/L). The results of the present study confirmed that WWTP effluents can be a source of PET MNP in the environment.
近年来，人们对小塑料颗粒（<5 毫米）和纳米塑料（<1 微米），简称 MNP，对环境和人类健康的影响的担忧日益增加。以前已经在不同的环境样本中检测到聚对苯二甲酸乙二醇酯（PET）微塑料，包括淡水和废水污泥。在本研究中，我们针对直径小于 5 毫米的所有 PET 小塑料颗粒（“PET MNP”）。应用了一种简单的三步干燥方法（在基质中），在乙二醇中 PET 解聚，然后进行液相色谱-质谱（LC-MS）分析，用于定量分析从 10 家荷兰污水处理厂采集的进水和出水样品中的 PET MNP。在废水基质中，PET 的回收率为 98%。进水和出水样品中 PET 的检出限（LOD）分别为 2.0 μg/L 和 1.2 μg/L。所有进水样品（范围从 24.9 μg/L 到 680 μg/L）和大部分出水样品（范围从<LOD 到 23.1 μg/L）中都检测到了 PET MNP。本研究的结果证实，污水处理厂的出水可能是环境中 PET MNP 的一个来源。
