Environmental Assessment of Nonradioactive CsCl using Experimental Model Ecocystem

Abstract

Environmental assessment of nonradioactive CsCl was conducted using experimental model ecosystems. The m-NOEC was determined as less than 1mg・l^-1 and the transition of ecosystem occuerd in 1mg・l^-1 Cs loading in Gnotobiotic type microcosm system. The activity of ecosystem was decreased to about 40% in 1mg・l^-1 Cs loading in Stress selected type microcosm system. Furthermore, approximately 10 times difference was recognized between radiation exposure (hot run) and metal loading (cold run) in comparison with gamma-irradiation experiment.