کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8082194 1521590 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Scavenging of radioactive soluble gases from inhomogeneous atmosphere by evaporating rain droplets
ترجمه فارسی عنوان
دفع گازهای محلول در رادیو اکتیو از جو ناهمگن با تبخیر قطرات باران
کلمات کلیدی
گازهای رادیواکتیو، فریزر جذب گاز، اتمسفر، تبخیر قطره، بارش،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی
We analyze effects of inhomogeneous concentration and temperature distributions in the atmosphere, rain droplet evaporation and radioactive decay of soluble gases on the rate of trace gas scavenging by rain. We employ a one-dimensional model of precipitation scavenging of radioactive soluble gaseous pollutants that is valid for small gradients and non-uniform initial altitudinal distributions of temperature and concentration in the atmosphere. We assume that conditions of equilibrium evaporation of rain droplets are fulfilled. It is demonstrated that transient altitudinal distribution of concentration under the influence of rain is determined by the linear wave equation that describes propagation of a scavenging wave front. The obtained equation is solved by the method of characteristics. Scavenging coefficients are calculated for wet removal of gaseous iodine-131 and tritiated water vapor (HTO) for the exponential initial distribution of trace gases concentration in the atmosphere and linear temperature distribution. Theoretical predictions of the dependence of the magnitude of the scavenging coefficient on rain intensity for tritiated water vapor are in good agreement with the available atmospheric measurements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Radioactivity - Volume 143, May 2015, Pages 29-39
نویسندگان
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