Extraction of 137Cs from moss using solutions similar to acid rain

Abstract

1 In sti tute for the Ap pli ca tion of Nu clear En ergy, Uni ver sity of Bel grade, Belgrade, Ser bia 2 Fac ulty of Phys i cal Chem is try, Uni ver sity of Bel grade, Bel grade, Ser bia Sci en tific pa per https://doi.org/10.2298/NTRP190520034CEx trac tion of 137 Cs from: Hypnum cupressiforme and Isothecium myurum mosses was in ves tigated us ing the fol low ing so lu tions: H 2 SO 4 , HNO 3 , and a mix ture of H 2 SO 4 and HNO 3 at three pH val ues (4.61, 5.15, and 5.75) and dis tilled wa ter (pH = 6.50). 19.1-34.7 and 18.4-30.5, and us ing dis tilled wa ter 29.1 and 26.9. Sorp tion of 137 Cs was per formed at no less than two sorp tion points in moss tis sue. In the in ves ti gated pH re gion no sig nif i cant in flu ence of H 2 SO 4 or HNO 3 on 137 Cs ex trac tion was noted in re la tion to wa ter ex trac tion, i. e. ex trac tion with acid rain with pH > 4.6. Af ter five suc ces sive desorption pro cesses last ing 24 hours the fol low ing amounts of 137 Cs [%] were ex tracted from mosses: us ing acid so lu tions