An Establishment of rapid accurate monitoring methods to measure radionuclides in an aquatic environmet by passive samplers

2014 Fiscal Year Final Research Report

• Project/Area Number: 24651033
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental impact assessment/Environmental policy
• Research Institution: Chiba Institute of Technology
• Principal Investigator: KAMEDA Yutaka 千葉工業大学, 工学部, 助教 (60397081)
• Co-Investigator(Kenkyū-buntansha): NAKANO Kazunori 日本大学, 工学部・土木工学科, 准教授 (30292519)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 放射性セシウム / パッシブサンプリング / ラドディスク / グラブサンプリング / 陸水

Outline of Final Research Achievements

Novel rapid analysis methods have been develped to measure trace levels of radiocaesium in surface water by using absorbent disks for radiocaesium wth a NaI scintillation counter.　One method involevs two steps, that is, 1) to pass water samples through the disk to absorb radioactive caesium onto it and 2) to measure radioactive caesium on it by a NaI scintillation counter. The method makes it possible to concentrate radioactive caesium in water samples automatically and to finish the analysis in a shorter time than ordinary methods. The other method is a passive sampling method. This method can calculate time weighted average concentration at sampling sites during the deployment by permeating radioactive caesium on disks at sampling sites. Even at highly contaminated sites, contamination levels can be measured safely because the deployment takes only a few minutes. Moreover, this method can be reveal contamination with levels as spatial and temporalrepresentativeness.

Free Research Field

環境化学