Xu Li, Han Lihua, Li Jing, Zhang Hao, Jones Kevin, Xu Elvis Genbo
Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture & Forestry Sciences, Beijing 100095, China; Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China.
Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture & Forestry Sciences, Beijing 100095, China; Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China.
J Hazard Mater. 2022 Feb 15;424(Pt A):127234. doi: 10.1016/j.jhazmat.2021.127234. Epub 2021 Sep 16.
Meso- and microplastics (MMPs) have attracted attention as globally dispersed environmental pollutants. However, little is known about the transfers of MMPs between aquatic and terrestrial systems. A large watershed-estuarine area of Bohai Sea was used as a case study, and soils and sediments were sampled adjacent to each other at a wide range of sites. MMPs were detected in all sediments (6.7-320 MMPs/kg) and soils (40-980 MMPs/kg), with the average abundance in soils double that in sediments on a dry mass basis. MMPs < 1 mm were most abundant and the dominant shape was film in both sediments and soils. Over twenty polymer types were detected and their compositions in sediments and soils were different. MMP abundance in sediments was lower in the upper catchment than the lower catchment, while the abundance of soil MMPs was the opposite. Despite the proximity of the sampling locations, no clear relationship was identified between the soil and sediment MMPs, suggesting low transfer between the two compartments and high heterogeneity of the sources. The missing associations between aquatic and terrestrial MMPs should be systematically examined in future studies, which is crucial for understanding the environmental fate and impacts of MMPs.
微塑料和中塑料（MMPs）作为全球分散的环境污染物已引起关注。然而，关于MMPs在水生系统和陆地系统之间的转移情况，人们了解甚少。以渤海的一个大型流域 - 河口区域为例进行研究，在广泛的地点对相邻的土壤和沉积物进行了采样。在所有沉积物（6.7 - 320个MMPs/千克）和土壤（40 - 980个MMPs/千克）中均检测到了MMPs，以干质量计，土壤中MMPs的平均丰度是沉积物中的两倍。小于1毫米的MMPs最为丰富，在沉积物和土壤中，其主要形状均为薄膜状。检测到了二十多种聚合物类型，它们在沉积物和土壤中的组成不同。沉积物中MMPs的丰度在上游集水区低于下游集水区，而土壤中MMPs的丰度情况则相反。尽管采样地点相邻，但未发现土壤和沉积物中MMPs之间存在明显关系，这表明两个区域之间的转移率较低且来源具有高度异质性。未来的研究应系统地考察水生和陆地MMPs之间缺失的关联，这对于理解MMPs的环境归宿和影响至关重要。
