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

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China
	Yang, Jie 4,6; Song, Kaifu 4,5; Tu, Chen 4,6; Li, Lianzhen 1,3; Feng, Yudong 4,6; Li, Ruijie 2,4,6; Xu, Hua 4,5; Luo, Yongming 4,6
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2023-02-01
卷号	858 页码:8
关键词	Mulching Paddy soil Microplastics Distribution Weathering characteristics
ISSN号	0048-9697
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.
WOS关键词	POLYETHYLENE
WOS研究方向	Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000898823800013
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS, China
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/32479]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者	Luo, Yongming
作者单位	1.Qingdao Univ, Coll Environm Sci & Engn, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Northwest Inst Eco Environm & Resources, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 6.Chinese Acad Sci, Inst Soil Sci, CAS Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, 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.