2016—2021年四川省地表水体中^(226)Ra放射性水平及健康风险评估  

Assessment of ^(226)Ra radioactivity level and public health risk in surface water of Sichuan province from 2016 to 2021

作　　者：唐辉 李斌[1] 杨永钦 罗茂丹 宗志龙 陈小红 TANG Hui;LI Bin;YANG Yong-qin;LUO Mao-dan;ZONG Zhi-long;CHEN Xiao-hong(Sichuan Management and Monitoring Center Station of Radioactive Environment,Chengdu,Sichuan 611139,China;不详)

机构地区：[1]四川省辐射环境管理监测中心站,成都611139 [2]成都理工大学核技术与自动化工程学院 [3]德阳市生态环境局

出　　处：《环境与健康杂志》2025年第1期42-47,共6页Journal of Environment and Health

摘　　要：目的了解四川省地表水体中^(226)Ra的放射性水平并对其健康风险进行评估。方法于2016年至2021年间检测了四川省主要地表水系23个监测断面的^(226)Ra放射性水平,应用剂量转换系数计算待积有效剂量,应用健康风险模型评估对居民的健康风险。结果四川省地表水体中^(226)Ra的放射性水平为1.9 m Bq/L~20.0m Bq/L,所有地表水体中^(226)Ra的放射性水平均合格;不同年度、不同地表水体的^(226)Ra放射性水平间比较,差异均无统计学意义(P>0.05);平水期地表水体的^(226)Ra放射性水平高于枯水期,差异有统计学意义(P<0.05)。通过饮水、水体浸没途径摄入^(226)Ra而所致年均待积有效剂量在各年龄组均低于0.1 m Sv,对各年龄段居民所致的总致癌风险处于9.50×10^(-9)/a~1.004×10^(-7)/a,均低于WHO和ICRP发布的限值(10^(-6)/a和5×10^(-5)/a)。结论四川省主要地表水系中^(226)Ra的放射性水平均未超标,经直接饮水途径、水体浸没途径摄入^(226)Ra所致健康风险处于可接受水平;全省主要地表水体中^(226)Ra的放射性水平对各年龄组都是安全的。Objective To understand the radioactive level of^(226)Ra in surface water in Sichuan province and the health risk.Methods From 2016 to 2021,^(226)Ra levels in 23 monitoring sections of major surface water systems in Sichuan province were detected.The effective dose to be accumulated was calculated by dose conversion coefficient,and the health risk model was used to assess the health risk to residents.Results The level of^(226)Ra in surface water of Sichuan province was 1.9-20.0 mBq/L,and the level of^(226)Ra in all surface water bodies was qualified.There was no significant difference in^(226)Ra radioactivity levels in different years and different surface water bodies(P>0.05).The^(226)Ra level of surface water in normal water period was higher than that in dry water period,and the difference was statistically significant(P<0.05).The average annual effective dose of^(226)Ra due to intake through drinking water and water immersion was lower than 0.1 mSv in all age groups,and the total carcinogenic risk for residents of all ages was 9.50×10^(-9)/a-1.004×10^(-7)/a,both lower than the limits published by WHO and ICRP(10^(-6)/a and 5×10^(-5)/a).Conclusion The radioactive level of^(226)Ra in the main surface water systems in Sichuan province is not exceeded,and the health risk caused by ingestion of^(226)Ra through drinking water and water immersion is at an acceptable level.Radioactivity levels of^(226)Ra in the province's major surface water bodies are safe for all age groups.

关 键 词：地表水体 ^(226)Ra 放射性水平 健康风险 

分 类 号：R123.1[医药卫生—环境卫生学]