干旱区生态环境知识资源中心(Arid): Microplastics in agricultural soils: Extraction and characterization after different periods of polythene film mulching in an arid region

Arid

DOI	10.1016/j.scitotenv.2020.141420
	Microplastics in agricultural soils: Extraction and characterization after different periods of polythene film mulching in an arid region
	Li, Wenfeng; Wufuer, Rehemanjiang; Duo, Jia; Wang, Shuzhi; Luo, Yongming; Zhang, Daoyong; Pan, Xiangliang
通讯作者	Pan, XL
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	749
英文摘要	Plastic film mulching has been extensively used in farmland, especially in and regions, for over half-century. However, this has led to heavy pollution of soils by microplastics (MPs). Currently, efficient extraction of MPs from the organo-mineral soil matrix is a problem because microsize clay particles tightly adhere to MPs. It is therefore extremely challenging to investigate, identify, quantify, and characterize MP particles and their behavior in agricultural soils. In this study, we developed a simple and effective method of separating and extracting MPs from the soil matrix. Clean polyethylene (PE) MPs were obtained after a series of treatments including pressure leaching, flotation, electrostatic adsorption, and concentrated sulfuric acid (98% H2SO4) carbonization. The characteristics of MP pollutants, such as abundance, size, and morphology, in soils that have been continuously mulched with PE film for various periods of time were determined after extraction. The highest abundance of MPs (40.35 mgkg) with sizes ranging from 0.9-2.0 mm was found in soil samples that had been continuously mulched with plastic film for 30 years. The sampled MP particles are in the microplastic size (0.8-0.3 mm) range, and the size of MPs decreases gradually as the period of mulching increased. Scanning electron microscopy analysis showed that the surface of the MP particles showed visible cracks, with round holes, and the particle surface roughened as the number of years of continuous mulching increased. Fourier-transform infrared spectroscopy results showed that the absorption peak area of hydrocarbyl (-CH2) of PE MPs decreased significantly, and the typical oxidation characteristic peak area increased as the mulching period increased. The concentration of mesoplastics also increased, from 91.20 mg/kg to 308.50 mg/kg, when the mulching period increased from 5 to 30 years. (C) 2020 Published by Elsevier B.V.
英文关键词	Farmland soils Film mulching Microplastics Separation and extraction method
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000581793800027
WOS关键词	MARINE-ENVIRONMENT ; PLASTIC DEBRIS ; SEA ; PARTICLES ; TRANSPORT ; SEDIMENTS ; POLLUTION ; ACCUMULATION ; POLYETHYLENE ; COMMUNITIES
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327077
作者单位	[Li, Wenfeng; Wufuer, Rehemanjiang; Duo, Jia; Wang, Shuzhi; Pan, Xiangliang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Li, Wenfeng; Wufuer, Rehemanjiang; Duo, Jia; Wang, Shuzhi; Pan, Xiangliang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Environm Pollut & Bioremediat, Urumqi 830011, Peoples R China; [Li, Wenfeng; Wufuer, Rehemanjiang; Duo, Jia; Wang, Shuzhi; Pan, Xiangliang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Luo, Yongming] Chinese Acad Sci, Inst Soil Sci, Nanjing, Peoples R China; [Zhang, Daoyong; Pan, Xiangliang] Zhejiang Univ Technol, Coll Environm, Key Lab Microbial Technol Ind Pollut Control Zhej, Hangzhou 310014, Peoples R China
推荐引用方式 GB/T 7714	Li, Wenfeng,Wufuer, Rehemanjiang,Duo, Jia,et al. Microplastics in agricultural soils: Extraction and characterization after different periods of polythene film mulching in an arid region[J]. 中国科学院新疆生态与地理研究所,2020,749.
APA	Li, Wenfeng.,Wufuer, Rehemanjiang.,Duo, Jia.,Wang, Shuzhi.,Luo, Yongming.,...&Pan, Xiangliang.(2020).Microplastics in agricultural soils: Extraction and characterization after different periods of polythene film mulching in an arid region.SCIENCE OF THE TOTAL ENVIRONMENT,749.
MLA	Li, Wenfeng,et al."Microplastics in agricultural soils: Extraction and characterization after different periods of polythene film mulching in an arid region".SCIENCE OF THE TOTAL ENVIRONMENT 749(2020).