干旱区生态环境知识资源中心(Arid): Entrainment and horizontal atmospheric transport of microplastics from soil

Arid

DOI	10.1016/j.chemosphere.2023.138150
	Entrainment and horizontal atmospheric transport of microplastics from soil
	Abbasi, Sajjad; Rezaei, Mahrooz; Mina, Monireh; Sameni, Abdolmajid; Oleszczuk, Patryk; Turner, Andrew; Ritsema, Coen
通讯作者	Abbasi, S
来源期刊	CHEMOSPHERE
ISSN	0045-6535
EISSN	1879-1298
出版年	2023
卷号	322
英文摘要	Soils are an important source of microplastics (MPs) to the atmosphere but the fluxes and mechanisms involved in MPs entrainment are not well understood. In the present study, a series of horizontally aligned sediment traps have been deployed at different heights within 1 m above the ground for a two-month period at various locations in an arid region (Sarakhs, Iran). MPs were isolated from sediments and were quantified and characterised ac-cording to size, colour, shape and polymer composition by established techniques. Most MPs were <250 mu m in length, fibres were the most important shape, black and blue-green were the dominant colours, and polymer abundance decreased in the order polyethylene > nylon > polypropylene > polystyrene > polyethylene tere-phthalate. The distributions of sediment mass (range <0.01-9 g) and number of MPs (range = 0 to 21) were heterogeneous, both between sites and at the different heights sampled, and yielded median, vertically-averaged horizontal fluxes for the region of about 450 g m- 2 d-1 and 2600 MP m- 2 d-1, respectively. However, when data were pooled, the number of MPs normalised to sediment mass exhibited a significant inverse relationship with sediment mass, an effect attributed to the presence of ambient suspended MPs and sediment that are diluted by the suspension of soil and deposited MPs at higher wind speeds. The mechanisms of MP saltation and entrainment were not ascertained but a theoretical framework for threshold shear velocity based on regularly -shaped particles and density considerations is presented. Further experimental work is required to verify this framework, and in particular for fibrous MPs with different aerodynamic properties to soil particles.
英文关键词	Soils Wind erosion Entrainment Transport Saltation MWAC Sampler
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000953411000001
WOS关键词	WIND ; DEPOSITION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395742
推荐引用方式 GB/T 7714	Abbasi, Sajjad,Rezaei, Mahrooz,Mina, Monireh,et al. Entrainment and horizontal atmospheric transport of microplastics from soil[J],2023,322.
APA	Abbasi, Sajjad.,Rezaei, Mahrooz.,Mina, Monireh.,Sameni, Abdolmajid.,Oleszczuk, Patryk.,...&Ritsema, Coen.(2023).Entrainment and horizontal atmospheric transport of microplastics from soil.CHEMOSPHERE,322.
MLA	Abbasi, Sajjad,et al."Entrainment and horizontal atmospheric transport of microplastics from soil".CHEMOSPHERE 322(2023).