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

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• 作者：Ge Yan ; Hyung-Mi Cho ; Insung Lee ; Guebuem Kim ; ^{gkim@snu.ac.kr}
• 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 ²¹⁰Po in the urban atmosphere of Seoul, Korea. The dominant fraction of ²¹⁰Po in our samples, independent of the in-situ decay of tropospheric ²¹⁰Pb, was linked with anthropogenic processes. Using vanadium and potassium as tracers, the excess ²¹⁰Po was mainly attributed to combustion of coal, with minor contributions from biomass burning. The annual integrated amount of ²¹⁰Po deposited over the Seoul area via precipitation was estimated to be 1.75聽脳聽10¹⁰聽Bq聽yr^鈭?, 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 ²¹⁰Po is expected to increase in the following decades, which should be carefully monitored.