我国陆地表层土壤的<sup>238</sup>Pu水平和溯源分析

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Abstract To fill the lack of background data of ²³⁸Pu in terrestrial environment of China, the surface soil samples collected from different locations were analyzed for the plutonium isotopes content (²³⁸Pu, ^239+240Pu). The results showed that the specific activities of ²³⁸Pu in samples were very low, in range of 0.007~0.045Bq/kg and the activity ratios of ²³⁸Pu/^239+240Pu were in range of 0.032~0.041, similar to the reported data from neighboring countries and other mid-latitude locations in the northern hemisphere. A binary model was employed to attribute the origin of ²³⁸Pu in the environment, and the results suggested that the origin of ²³⁸Pu in surface soils be related most of all to nuclear weapon fallout and SNAP-9A fallout.

Key words： surface soils ²³⁸Pu content source

Received: 31 May 2022

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X53

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	ZHAI Shao-jing
	ZHANG Hai-tao
	LUO Mao-yi
	YI Xiao-wei
	LIN Jian-feng
	ZHANG Wei-chao
	ZHANG Zi-lu
	DANG Hai-jun

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ZHAI Shao-jing,ZHANG Hai-tao,LUO Mao-yi等. Level and source of ²³⁸Pu in Chinese terrestrial surface soils[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(12): 5796-5802.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I12/5796

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