Vertical distribution and weathering characteristic of microplastics in soil profile of different land use types

After deposition on the topsoil, microplastics (MPs) may be vertically migrated to deeper soil layers over time or eventually enter the groundwater system, leading to more widespread environmental and ecological issues. However, the vertical distribution of MPs in natural soils are not yet fully und...

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Bibliographic Details
Published in:The Science of the total environment 2023-12, Vol.905, p.166902, Article 166902
Main Authors: Qiu, Yifei, Zhou, Shenglu, Zhang, Chuchu, Chen, Long, Qin, Wendong, Zhang, Qi
Format: Article
Language:English
Subjects:
arid lands
Carbonyl index
China
environment
environmental fate
gardens
groundwater
lakes
land use
Land use types
Microplastics
Migration
migratory behavior
paddies
polyethylene
polypropylenes
soil depth
soil profiles
spatial distribution
structural equation modeling
tea
topsoil
Vertical distribution
woodlands
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Summary:After deposition on the topsoil, microplastics (MPs) may be vertically migrated to deeper soil layers over time or eventually enter the groundwater system, leading to more widespread environmental and ecological issues. However, the vertical distribution of MPs in natural soils are not yet fully understood. In this study, we collected soil profiles (0–100 cm) from four different land use types on the west bank of Taihu Lake in China to investigate the vertical distribution and weathering characteristics of MPs. The average abundance of soil MPs followed the pattern of paddy field (490 ± 82 items/kg) > dryland (356 ± 55 items/kg) > tea garden (306 ± 32 items/kg) > woodland (171 ± 27 items/kg) in the 0–10 cm layer, and the abundance of MPs decreased linearly with soil depth (r = −0.89, p 
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2023.166902