海峡西岸典型城市大气降尘稀土元素生态风险及来源——基于钕同位素MixSIAR模型解析

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Abstract Rare earth elements as a kind of emerging contaminants (ECs) began to be widely concerned by scholars. In order to investigate the ecological risk and source contribution of rare earth elements in atmospheric dust in typical cities on the west coast of the China Straits, 15 sampling sites were set up in different functional areas of Quanzhou City to collect and analyze atmospheric dust samples and main potential pollution sources. The potential ecological risk index was used to evaluate the risk of rare earth elements, and the Nd isotope MixSIAR model was used for qualitative analysis and quantitative calculation. On the whole, the potential ecological risk index of rare earth elements in the dustfall in typical cities on the west coast of the Taiwan Strait was at low risk level. While Lu element was at medium risk at some sampling points, and the potential risk index of individual sampling points in industrial areas, commercial areas and heavy traffic areas was relatively high. The Plot of εNd(0) vs Eu/Eu* and εNd(0) vs ΣREEs show that rare earth elements in atmospheric dust samples were greatly affected by natural sources and local anthropogenic emissions such as gasoline exhaust dust, coal burning dust and cement dust. The relative contribution rate of each potential source was calculated by using the (¹⁴³Nd/¹⁴⁴Nd) MixSIAR model. The influence of rare earth elements in atmospheric dusfall in Quanzhou City was greatly influenced by the background soil(24.0%~40.9%), followed by gasoline exhaust dust (20.7%~33.3%) and coal burning dust (21.1%~29.0%). The impact of cement dust (13.7%~20.0%) was relatively low.

Key words： atmospheric dustfall rare earth elements ecological risk Nd isotope tracing MixSIAR model

Received: 29 March 2023

PACS:	X513
	X142

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	Articles by authors
	LI Yi-hong
	YU Rui-lian
	ZHANG Rui-qi
	HU Gong-ren
	YAN Yan

Cite this article:

LI Yi-hong,YU Rui-lian,ZHANG Rui-qi等. The ecological risks and sources of rare earth elements in the dustfall in typical cities of West China Strait-Based on neodymium isotope tracing combined with MixSIAR model[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5663-5670.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5663

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