在高湿度环境下用活性炭盒测量氡浓度的研究  

STUDY ON RADON CONCENTRATION MONITORING USING ACTIVATED CHARCOAL CANISTERS IN HIGH HUMIDITY ENVIRONMENTS

作　　者：王月兴[1] 王海军[1] 杨翊方[1] 秦思昌[1] 王震涛[1] 张振江[1] 

机构地区：[1]海军医学研究所,上海200433

出　　处：《辐射防护》2009年第6期404-407,共4页Radiation Protection

摘　　要：本文研究了在高湿度环境中使用活性炭盒测量氡浓度时湿度对灵敏度的影响。所用的活性炭盒为圆柱形,每一个盒内装80g活性炭。活性炭盒在相对湿度为68%、80%、88%和96%环境中(28℃)暴露48h和72h。在盒内被吸收的氡的量用氡子体214Pb和214Bi的γ射线计数确定。实验结果表明,在湿度相同情况下,计数随湿度的增高而降低,两个变量之间呈现负线性相关。在相对湿度68%到96%之间,湿度每增加1%,吸收氡的灵敏度减少约2.4%。在高湿度环境中,活性炭盒的暴露时间不宜超过3天。The effects of humidity on the sensitivity using activated charcoal canisters for measuring radon concentrations in high humidity environments were studied. Every canister filled with 80 g of activated charcoal, and they were exposed to 48 h or 72 h in the relative humidity of 68%, 80%, 88% and 96% （28 ℃）, respectively. The amount of radon absorbed in the canisters was determined by counting the gamma rays from ^214Pb and ^214Bi （radon progeny）. The results showed that counts decreased with the increase of relative humidity. There was a negative linear relationship between count and humidity. In the relative humidity range of 68% -96%, the sensitivity of radon absorption decreased about 2.4% for every 1% （degree） rise in humidity. The results also showed that the exposure time of the activated charcoal canisters should be less than 3 days.

关 键 词：氡浓度 活性炭盒 高湿度 暴露时间 灵敏度 

分 类 号：X837[环境科学与工程—环境工程] TS205.7[轻工技术与工程—食品科学]