Sorption of selected radionuclides from liquid radioactive waste by sorbents of biological origin: The alkaline earth alginates

The sorption of ²⁴¹Am³⁺, ⁸⁵Sr²⁺ and ¹³⁷Cs⁺ by calcium, strontium and barium alginates has been studied under different operation conditions. The most prominent adsorption was found in the pH range of 5–6 for all systems, even if the observed dependence on the acidity of the solution was small. The most favourable time for the adsorption process was found to be about 2 h for calcium alginate and 4 h for the other two sorbents.