盘锦市表层土壤放射性核素含量调查分析  

Analysis of radionuclide content in the surface soil of Panjin,China

作　　者：李政儒 黄艳茹[1] 张苏雅拉吐 王德鑫 李雪[2] 蒙古夫 LI Zhengru;HUANG Yanru;ZHANG Suyalatu;WANG Dexin;LI Xue;MENG Gufu(Liaoning Petrochemical University,Fushun 113001 China;Institute of Nuclear Physics,Inner Mongolia University for the Nationalities,Tongliao 028000 China)

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001 [2]内蒙古民族大学核物理研究所,内蒙古通辽028000

出　　处：《中国辐射卫生》2022年第6期687-693,共7页Chinese Journal of Radiological Health

基　　金：国家自然科学基金资助项目(11765014,U2032146)。

摘　　要：目的测量盘锦市环境土壤中天然及人工放射性核素比活度,掌握放射性核素在表层土壤中含量,并对该地区居民受辐射健康风险进行科学评估。方法采集盘锦市辖区内31个表层土壤样品,利用高纯锗探测器进行γ能谱分析,获得放射性核素含量和现行环境放射性水平。采用两独立样本均数t检验方法,分别比较盘锦市与辽宁省和全国土壤核素比活度样本数据。结果盘锦市表层土壤样品中天然放射性核素^(238)U、^(226)Ra、^(232)Th、^(40)K和人工放射性核素^(137)Cs比活度均值为18.7 Bq·k-1、19.6 Bq·kg^(-1)、23.5 Bq·kg^(-1)、604.6 Bq·kg^(-1)和0.9 Bq·kg^(-1)。结论盘锦市表层土壤天然和人工放射性核素的比活度均处于本底水平,对该地区民众造成的健康风险非常低。Objective To measure the specificactivity of natural and synthetic radionuclides in the environmental soil of Panjin,China and determine the content of radionuclides in the surface soil,and to conduct a scientific assessment of the radiation health risks of residents in this area.Methods Thirty-one surface soil samples were collected within the jurisdiction of Panjin,and a high-purity germanium detector was used forγspectrum analysis to obtain the content of radionuclides and the current environmental radioactivity level.The two independent samples mean t-test was used to compare the specific activity data of radionuclides in soil samples between Panjin and Liaoning Province or China.Results The meanspecific activities of natural radionuclides^(238)U,^(226)Ra,^(232)Th,^(40)K,and synthetic radionuclide^(137)Cs in the surface soil samples of Panjin were 18.7 Bq/kg,19.6 Bq/kg,23.5 Bq/kg,604.6 Bq/kg,and 0.9 Bq/kg,respectively.Conclusion The specific activities of natural and synthetic radionuclides in the surface soil samples of Panjin Area at the background level,causing a very low health risk to the people in this area.

关 键 词：土壤 比活度 环境放射性 Γ能谱仪 盘锦市 

分 类 号：X591[环境科学与工程—环境工程]