中国表层土壤中<sup>239+240</sup>Pu的空间分布与变异性研究

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Abstract

In order to understand the range of ^239+240Pu and ²⁴⁰Pu/²³⁹Pu that the data from the literature published in 1991 to 2019, spatial distribution and variability of ^239+240Pu and ²⁴⁰Pu/²³⁹Pu in Chinese surface soil were quantitatively analyzed by statistical analysis and mathematical model. The results showed that the atom ratio of ²⁴⁰Pu/²³⁹Pu in Chinese surface soil was concentrated at 0.18(99%), the global fallout was the main source of ^239+240Pu in the surface soil of China;^239+240Pu was at a low radiation level (£1Bq/kg, 94%) in the surface soil, and the ^239+240Pu of Northwest and Northeast China had a high spatial variability. The ^239+240Pu distribution were affected by atmospheric mixing, canopy effect, soil particle size, organic matter and migration (horizontal and vertical migration). At the same time, this study systematically combed out the mathematical model for calculating the spatial variation of ^239+240Pu in surface soil of China, providing an effective method for quantitative assessment of the environmental level of ^239+240Pu.

Key words： surface soil ^239+240Pu ²⁴⁰Pu/²³⁹Pu distribution variability migration

Received: 12 November 2019

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X53

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	HUANG Ya-nan
	PAN Shao-ming
	XIAO Zhi
	DENG Shu-lin

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HUANG Ya-nan,PAN Shao-ming,XIAO Zhi等. Spatial distribution and variability of ^239+240Pu in surface soil of China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2554-2564.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I6/2554

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