文献类型： 外文期刊

作者： Zhang, Ya ¹ ; Wang, Kang ² ; Chen, Weizhi ¹ ; Ba, Yong ¹ ; Khan, Kifayatullah ⁵ ; Chen, Wei ³ ; Tu, Chen ⁶ ; Chen, Changer ⁷ ; Xu, Li ² ;

作者机构： 1.China Geol Survey, Kunming Nat Resources Comprehens Invest Ctr, Kunming 650100, Yunnan, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol, Beijing 100097, Peoples R China

3.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China

4.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China

5.Univ Swat, Dept Environm & Conservat Sci, Swat 19130, Pakistan

6.Chinese Acad Sci, Inst Soil Sci, CAS Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China

7.South China Normal Univ, Environm Res Inst, Sch Environm, Guangdong Prov Key Lab Chem Pollut & Environm Safe, Guangzhou 510006, Peoples R China

8.South China Normal Univ, Key Lab Theoret Chem Environm, MOE, Guangzhou 510006, Peoples R China

关键词： Microplastic; Soil pollution; Land use; Environmental factors; Distribution characteristics

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）

ISSN： 0048-9697

年卷期： 2022 年 847 卷

页码：

收录情况： SCI

摘要： Microplastic pollution in the soil environment has gathered widespread attention. However, little is known about the effects of land use and landscape patterns on the occurrence and distribution of microplastics in the soil. Herein, the microplastic pollution in different land uses (facility farmland, traditional farmland, orchard, grassland, and wood-land) in Yuanmou County, Yunnan Province was investigated. The results showed that the abundance of microplastic ranged from 50.000 to 3450.0 itemsmiddotkg-1, with an average abundance of 595.00 +/- 740.00 itemsmiddotkg-1 and a median of 375.00 itemsmiddotkg-1. Microplastics were found to primarily be green-coloured (28.4 %), fragment (72.7 %) in shape, <1 mm (75.7 %) in size, and composed of polypropylene (51.4 %). There were significant differences in the abundance and characteristics of the microplastics between different land use types. Microplastic abundance in facility farmlands, traditional farmlands, and orchard lands was significantly higher than that of grasslands and woodlands (p < 0.05). The main shape of the microplastics in facility farmlands, traditional farmlands, and orchards was fragments and it was fibers in grasslands and woodlands. The median particle size of microplastics in facility farmlands (539.50 mu m) and traditional farmlands (574.00 mu m), was smaller than those in the orchard (737.60 mu m), grasslands (697.60 mu m), and woodlands (1239.4 mu m). Discrepancies among different land uses may be due to various reasons, such as different pollution sources and the weathering degree of microplastics. The results of the redundancy analysis showed that the microplastic abundance was negatively correlated with the largest patch index. It also showed that microplastic pollu-tion was closely related to human activities. This study provides an important basis for further research on microplastic ecosystem risks that are associated with land use and provides a data basis for formulating effective prevention and control strategies and measures to mitigate soil microplastic pollution.