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The occurrence and distributions characteristics of microplastics in soils of different land use patterns in Karst Plateau, Southwest China

The Science of The Total Environment 2023 38 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Fudong Zhang, Fudong Zhang, Zhenming Zhang, Zhenming Zhang, Xiuyuan Yang, Xiuyuan Yang, Xiuyuan Yang, Zhenming Zhang, Fudong Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Fudong Zhang, Zhenming Zhang, Zhenming Zhang, Xiuyuan Yang, Zhenming Zhang, Xiuyuan Yang, Xiuyuan Yang, Xiuyuan Yang, Jiachun Zhang Xiuyuan Yang, Xiuyuan Yang, Xiuyuan Yang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Jiachun Zhang Jiachun Zhang Jiachun Zhang Jiachun Zhang Jiachun Zhang Zhenming Zhang, Fudong Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Jiachun Zhang Fudong Zhang, Fudong Zhang, Zhenming Zhang, Fudong Zhang, Zhenming Zhang, Xiuyuan Yang, Jiachun Zhang Zhenming Zhang, Fudong Zhang, Zhenming Zhang, Xiuyuan Yang, Zhenming Zhang, Zhenming Zhang, Jiachun Zhang

Summary

Researchers surveyed microplastic contamination across five different land use types in a karst mountainous region of southwest China. The study found that all soil types were polluted with microplastics, with garden land showing the highest average abundance at 4,200 particles per kilogram, and that land use patterns and crop types influenced the characteristics and concentrations of microplastic contamination.

Polymers

PE PET PP PVC

Microplastics (MPs) in soils have attracted attention worldwide. However, there are few studies on the abundance and morphological characteristics of MPs under different land use patterns in karst areas. In this work, the distribution characteristics of MPs in soils from five different land use patterns, including industrial mining warehouse (IW), cropland (CL), forest land (FL), grassland (GL), and garden land (GP) in karst mountainous areas of southwest China were investigated. The results suggested that soils in Karst Plateau of Guizhou province under different land use patterns have all been polluted by MPs. The average microplastic abundances of IW, CL, FL, GL, and GP were 3114, 2948, 2770, 2718, and 4200 item kg. In the GP and GL soils, foam was the dominant form of MPs (47.53 % and 45.92 %), with pellet MPs accounting for the smallest proportion, while in IW, CL, and FL soils showed the opposite result. The MPs in all soil samples were dominated by small particles (0-0.5 mm), and the main components were PE, PP, PVC, and PET. Meanwhile, the characteristics of MPs in CL soils varied depending on the planted crops. The average abundances of soil microplastics in farmlands planted with corn, pepper, cabbage, watermelon, and other crops were 2504, 2792, 2987, 2370, and 3655 item kg . We suggested that land use pattern and crop type may influence karst soil microplastic contamination. The results of this study provide a scientific basis for understanding and controlling the distribution, degradation, and migration of MP pollution in karst regions.

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