Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China

doi:10.1016/j.scitotenv.2022.159774

	Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China
	Yang, Jie 1,3; Song, Kaifu 2,3; Tu, Chen1,3 ; Li, Lianzhen4,6 ; Feng, Yudong 1,3; Li, Ruijie1,3,5 ; Xu, Hua 2,3; Luo, Yongming1,3
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
	2023-02-01
卷号	858 页码:8
关键词	Mulching Paddy soil Microplastics Distribution Weathering characteristics
DOI	10.1016/j.scitotenv.2022.159774
通讯作者	Luo, Yongming(ymluo@issas.ac.cn)
英文摘要	Agricultural 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.
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS, China
收录类别	SCI
语种	英语
关键词[WOS]	POLYETHYLENE
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000898823800013
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/32480
专题	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
通讯作者	Luo, Yongming
作者单位	1.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
推荐引用方式 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.