水稻田垂直剖面土壤稀土元素来源解析及生态风险评价——基于锶钕同位素示踪结合MixSIAR模型

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Abstract To investigate the sources and ecological risks of rare earth elements in vertical profiles of paddy soils, soil samples from three vertical profiles of paddy soils in southeastern Fujian Province and the surrounding potential sources were collected, and the rare earth element contents and strontium-neodymium isotopic compositions in these samples were determined. The source identification was firstly performed based on rare earth element contents and geochemical characteristics of vertical profile soils and potential sources. The source contribution was then quantified by using strontium-neodymium isotopes in combination with the MixSIAR model. Finally, the contribution of potential sources to the integrated potential ecological risks of rare earth elements in the vertical profile soils were evaluated by the combined results of ecological risk assessment and MixSIAR model. The results showed that rare earth elements in the P1 vertical profile soils were mainly originated from the soil parent material, and rare earth elements reached the medium ecological risk level. Rare earth elements in the P2 vertical profile soils were influenced by chemical fertilizers, and the ecological risks of rare earth elements in the shallow soil were greater than those in the deep soil. Rare earth elements in the P3 vertical profile soils were influenced by combination factors, and the ecological risks of rare earth elements were smaller. The ecological risks of rare earth elements in vertical profile soils were influenced by human factors while natural sources cannot be ignored.

Key words： Sr-Nd isotopes MixSIAR model rare earth elements vertical profile soils ecological risk

Received: 25 October 2022

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	CAO Jie
	YAN Yu
	YU Rui-lian
	WEN Bo-sen
	HU Gong-ren
	CUI Jian-yong
	YAN Yan
	HUANG Hua-bin

Cite this article:

CAO Jie,YAN Yu,YU Rui-lian等. Source apportionment and ecological risk assessment of rare earth elements in vertical profiles of paddy soils — Based on Strontium and neodymium isotope tracing combined with MixSIAR model[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 3002-3012.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I6/3002

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