Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology, School of Environmental Science and Safety Engineering, Tianjin University of Technology, 391 Binshui West Rode, Xiqing District, Tianjin, 300384, China.
Ministry of Agriculture and Rural Affairs, Agro-Environmental Protection Institute, Tianjin, 300191, China.
Environ Sci Pollut Res Int. 2022 Nov;29(54):81300-81307. doi: 10.1007/s11356-022-21415-3. Epub 2022 Jun 22.
Microplastics (MPs) have become a hot issue of environmental pollution. However, insufficient evidence exists regarding the distributions and fates of MPs in terrestrial environment, especially in farmlands. The distributions of MPs in paddy fields were investigated in Xiangtan City, a typical rice production area in China. The abundance of MPs in paddy seedling raising fields was 3805 ± 511 n·kg, which increased by approximately 9 times than that in common paddy fields. Transparent films became the dominant forms due to the huge usage of mulching films, corresponding to that the proportion of polyvinyl chloride (PVC) increased to 17% there. Moreover, an industrial plant nearby also contributed considerably to the MP pollution; the proportion of PVC (33%) in the paddy fields nearby increased to approximately 4 times of common paddy fields, while polyvinyl alcohol (PVA; 13%) used as an important chemical raw material to synthesis in various applications was uniquely detected there. These results highlight the input of MPs from agricultural and industrial activities in farmlands. Their contributions to the MP pollution in farmlands should be continuously investigated.
微塑料（MPs）已成为环境污染的一个热点问题。然而，关于 MPs 在陆地环境中的分布和归宿，特别是在农田中的分布和归宿，证据还不够充分。本研究以中国典型水稻种植区湘潭市为例，调查了稻田中 MPs 的分布。在水稻育秧田， MPs 的丰度为 3805 ± 511 n·kg，比普通稻田高约 9 倍。由于地膜覆盖的大量使用，透明薄膜成为主要形态，相应地聚氯乙烯（PVC）的比例增加到 17%。此外，附近的一家工业工厂也对 MP 污染有相当大的贡献；附近稻田中 PVC（33%）的比例增加到普通稻田的近 4 倍，而作为各种应用中合成的重要化学原料的聚乙烯醇（PVA；13%）则是在那里唯一检测到的。这些结果突出了农业和工业活动向农田输入 MPs 的情况。应继续调查它们对农田中 MP 污染的贡献。
