Activated Charcoal Cumulated Adsorption Method for Measuring Radon Exhalation Rate from Soil
Activated Charcoal Cumulated Adsorption Method for Measuring Radon Exhalation Rate from Soil
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发表时间：
2007
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通讯作者：
Hou Sheng-li
中科院分区：
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作者：
Hou Sheng-li
我们设计并开发了一种活性炭累积吸附法，用于测量土壤中氡析出率，以便在大面积、多地点进行快速观测。根据氡析出装置的现场测量数据和实时土壤氡析出率，研究了活性炭和采样装置的类型、累积暴露时间和氡有效衰变常数。我们对2002-2003年某大学校园（沙壤土）的土壤氡析出情况进行了调查。氡析出率平均值为20.15 mBq·m-2·s-1；标准差为3.55 mBq·m-2·s-1，变化范围为13.49～26.75 mBq·m-2·s-1。经比较，活性炭吸附和静电收集设备的结果是一致的。结果表明，活性炭吸附法测定现场土壤中222Rn的析出率实用、可行、快速。
We designed and developed an activated charcoal cumulated adsorption method for measuring radon exhalation rate from soil to perform rapid observation at many sites in a large area. Based on the data of measurements on the radon exhalation facility and real-time soil radon exhalation rate in the field, we studied the types of the activated charcoal and sampling device, accumulated exposure time and radon effective decay constant. We investigated the soil radon exhalation in a university yard (sandy loam) from 2002-2003. The average of radon exhalation rate is 20.15 mBq·m-2·s-1; the standard deviation is 3.55 mBq·m-2·s-1, and the variety ranges from 13.49 to 26.75 mBq·m-2·s-1. By comparison, the results of activated charcoal absorption and an equipment of electrostatic collection are coincident with each other. The results revealed that the method of activated charcoal absorption is practical, feasible and rapid for measuring the 222Rn exhalation rate from soil in the field.