深圳市大气气溶胶中210Po的比活度及其辐照剂量  

A study of ^(210)Po in atmospheric aerosol of Shenzhen and its committed effective dose

作　　者：苏玲玲[1] 刘国卿[1] 丁敏霞 冯江平 张鸿[1] LIU Guo-qing;FENG Jiang-ping;DING Min-xia;SU Ling-ling;ZHANG Hong(Institute of applied nuclear technology, College of physics and energy, Shenzhen University, Shenzhen 518060, China;Shenzhen Environmental Monitoring Center, Shenzhen 518049,China)

机构地区：[1]深圳大学物理与能源学院,核技术应用研究所,广东深圳518060 [2]深圳市环境监测中心站,广东深圳518049

出　　处：《中国环境科学》2017年第6期2025-2028,共4页China Environmental Science

基　　金：国家自然科学基金资助(11275130);广东省自然科学基金资助项目(2016A030313037);深圳市科技研发资助项目(JCYJ20150324141711585)

摘　　要：研究了深圳市大气颗粒物中^(210)Po的放射性比活度及其对人体所致辐照剂量.深圳大气总悬浮颗粒物(TSP)和PM_(2.5)中^(210)Po的比活度变化范围为0.01~0.20m Bq/m^3(平均0.08mBq/m^3)和0.03~0.38mBq/m^3(平均0.12mBq/m^3).研究发现,大气^(210(Po比活度与大气PM_(2.5)含量呈显著的正相关关系,而与降雨呈弱负相关,认为大气颗粒物是影响大气^(210)Po含量的重要因素.由呼吸摄入^(210)Po所致人体的年均待积有效剂量为4.53×10^(-6)Sv.The activity concentration of210Poin atmospheric aerosol of Shenzhen and its committed effective dose throughinhalation were studied.The activity concentrations of210Po in total suspended particle(TSP)and PM2.5were in the rangeof0.01~0.20mBq/m3(with an average of0.08mBq/m3)and0.03~0.38mBq/m3(with an average of0.12mBq/m3),respectively.The activity concentration of210Po showed significant positive correlation with the atmosphericconcentration of PM2.5,whereas it showed poor relationship with the amount of rainfall.It is suggested that theatmosphericparticle was the key factor that control the activity concentration of210Po in the air.The calculated averageannual committed effective dose of210Po through inhalation was4.53×10-6Sv.

关 键 词：大气气溶胶 210Po 待积有效剂量 深圳 

分 类 号：X513[环境科学与工程—环境工程] X837