Significant emissions of up>210up>Po by coal burning into the urban atmosphere of Seoul, Korea

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• 作者：Ge Yan ; Hyung-Mi Cho ; Insung Lee ; Guebuem Kimup> ; up>up>gkim@snu.ac.krup>
• 关键词：Po-210 ; Source ; Seoul ; Wet deposition ; Health risk ; Coal burning
• 刊名：Atmospheric Environment
• 出版年：2012
• 期刊代码：11_13522310
• 类别：env
• 出版时间：July, 2012
• 卷：54
• 期：Complete
• 页码：80-85
• 文件大小：620 K

摘要

We conducted a year-round survey of precipitation samples to investigate the sources of excess up>210up>Po in the urban atmosphere of Seoul, Korea. The dominant fraction of up>210up>Po in our samples, independent of the in-situ decay of tropospheric up>210up>Pb, was linked with anthropogenic processes. Using vanadium and potassium as tracers, the excess up>210up>Po was mainly attributed to combustion of coal, with minor contributions from biomass burning. The annual integrated amount of up>210up>Po deposited over the Seoul area via precipitation was estimated to be 1.75聽脳聽10up>10up>聽Bq聽yrup>鈭?up>, which might represent a potential public health risk in the vicinity of major point sources, due to its highly adverse biological effects. Since the world coal consumption is growing, the magnitude of coal burning derived up>210up>Po is expected to increase in the following decades, which should be carefully monitored.