Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China
Yang, Jie1,3; Song, Kaifu2,3; Tu, Chen1,3; Li, Lianzhen4,6; Feng, Yudong1,3; Li, Ruijie1,3,5; Xu, Hua2,3; Luo, Yongming1,3
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
2023-02-01
Volume858Pages:8
KeywordMulching Paddy soil Microplastics Distribution Weathering characteristics
DOI10.1016/j.scitotenv.2022.159774
Corresponding AuthorLuo, Yongming(ymluo@issas.ac.cn)
AbstractAgricultural plastic-film residues have been considered as one of the important sources of microplastics in the agroecosystem. However, limited researches were conducted on the accumulation of microplastics in long-term film-mulched paddy soil. This study aims to investigate the distribution and the weathering characteristics of filmy microplastics in a mulched paddy field (non-mulch, four years of mulched, and ten years of continuous mulched soil were investigated) in Southwest China. More than 50 % of the microplastics in the mulched soil were 1-3 mm, whereas the largest percentage of the microplastics in the non-mulched soil was <1 mm (55.3 %). Microplastic compositions in this field mainly consist of polyester (PES) and polyethylene (PE) (82.1 %). The abundance of microplastics increases with the film mulching time, which were 76.2 +/- 18.4, 118.6 +/- 44.8, and 159.6 +/- 23.5 items kg-1 in soil with non -mulching, four years of mulching, and ten years of continuous mulching, respectively. The filmy microplastics accumu-lated annually in the plough layer is estimated at 18.1 million items ha-1. Weathering characteristics of filmy microplastics extracted from paddy soil were characterized using FTIR, SEM-EDS, AFM, and contact angle meter. The vinyl, carbonyl, and hydroxyl indices calculated from FTIR results showed that the degradation degree of microplastics incereased as mulching time rose; compared with commercial PE films, the oxygen-containing functional groups of soil-extracted PE films were increased. This study revealed the status of microplastic pollution in paddy soil with long-term mulching. It provided primary data and a scientific basis for further study on environmental behavior and ecological impacts of microplastics in agricultural soils.
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS, China
Indexed BySCI
Language英语
WOS KeywordPOLYETHYLENE
WOS Research AreaEnvironmental Sciences & Ecology
WOS IDWOS:000898823800013
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/32480
Collection中国科学院海岸带环境过程与生态修复重点实验室
中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
Corresponding AuthorLuo, Yongming
Affiliation1.Chinese Acad Sci, Inst Soil Sci, CAS Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
5.Chinese Acad Sci, Northwest Inst Eco Environm & Resources, Lanzhou 730000, Peoples R China
6.Qingdao Univ, Coll Environm Sci & Engn, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Yang, Jie,Song, Kaifu,Tu, Chen,et al. Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,858:8.
APA Yang, Jie.,Song, Kaifu.,Tu, Chen.,Li, Lianzhen.,Feng, Yudong.,...&Luo, Yongming.(2023).Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China.SCIENCE OF THE TOTAL ENVIRONMENT,858,8.
MLA Yang, Jie,et al."Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China".SCIENCE OF THE TOTAL ENVIRONMENT 858(2023):8.
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