224Ra and the 224Ra/228Ra activity ratio in selected mineral waters from the Polish Carpathians

Abstract

Min eral and ther a peu tic wa ters widely oc cur ring in the Pol ish Carpathians con tain a vast amount of biogenic el e ments. However, ra dio ac tive el e ments like ra dium iso topes are also found in these wa ters. This pa per pres ents the first re sults of the activ ity con cen tra tion mea sure ments of 224 Ra in se lected min eral wa ters of the Pol ish Carpathians. Ad di tion ally, the con tent of 226

Study of Well Waters from High-Level Natural Radiation Areas in Northern Vietnam

“…Each water sample was stored in a big, 50 L plastic container. Each water sample was co-precipitated as Ba(Ra)SO 4 for radium isotopes, then the uranium isotopes were subsequently precipitated as (NH 4 ) 2 U 2 O 7 together with MnO 2 [ 15 , 19 , 20 ]. The solid precipitate was then filtered.…”