南京城市典型水体中微塑料污染特征分析

Characteristics of micro-plastic pollution in Nanjing urban waters

为了解城市不同水体中微塑料污染的差异性,以南京市典型水体为研究对象,考察了微塑料的赋存水平、尺寸、颜色、形状和聚合物类型。结果表明:所有水样中均发现微塑料,其丰度范围是3475±25~21975±1075 items/m^3;较高的微塑料污染可能来源于污水处理厂尾水,三个饮用水源地微塑料污染相对较轻;绝大多数微塑料是纤维类;蓝色和透明是水体微塑料最为常见的颜色;粒径100~500μm和小于100μm的微塑料占比最高,分别达到64.71%和52.65%;PE和PP是最主要的微塑料聚合物。

Typical water bodies in Nanjing were taken as the objects to study the difference of micro-plastic pollution in different urban water bodies.The occurrence level,size,color,shape and polymer type of micro-plastic were investigated.The results show that micro-plastic are found in all water samples,with the abundance ranging from^3475±25~21975±1075 items/m^3.High micro-plastic pollution may caused by the tail water of sewage treatment plants.Micro-plastic pollution in the three drinking water sources is relatively light.Most of the micro-plastic forms are fiber.Blue and transparent are the most common colors of micro-plastic in water bodies.The proportions of micro-plastic of 100~500μm and less than 100μm are the highest,reaching 64.71%and 52.65%respectively.PE and PP are the main micro-plastic polymers.