Prussian blue (PB) and copper ferrocyanide (CF) were synthesized and characterized by XRD, SEM, XPS and N2-BET. The basic adsorption behavior of caesium (Cs) onto these adsorbents were investigated. The adsorption isotherms was fitted by both Langmuir and Freundlich isotherm equations (particularly fitted to Langmuir equation for CF). The maximum adsorption capacity based on Langmuir equation was determined to be 296 mg/g for PB and 409 mg/g for CF. Moreover, to evaluate the efficiency of SiO2 carried CF (CF-SiO2) as novel adsorbent for Cs, the effect of interfering cations on the adsorption capacity of Cs+ was investigated in the presence of several competitive cations (i.e., Na+, K+, Mg2+) as well as PB and CF. In the present study, this adsorbent was tentatively applied to the removal of radioactive caesium (137Cs). The adsorbent synthesized in this work can be an efficient adsorbent for Cs+.
Short-lived alpha particle emitters have recently attracted much attention with respect to the development of targeted radionuclide therapy. This paper reports the previous projects of radiation safety management for the short-lived alpha nuclides and the current status of the study for the preparation of the guideline for radiation safety management of short-lived nuclides.
Various experimental data on the biological effects caused by radiation have been accumulated. However, their quantitative and systematic understanding is lacking. We have been studying the biological effects of radiation with mathematical models. In this paper we would like to overview the progress of research to date and look into the future. We would also like to address the need for cross-disciplinary research.