Notes: OMA 1 pH 5.8-6.4; OMA 2 pH 6.3-6.7. RIP is a measure of radiocaesium interception potential, defined as a product of frayed edge site capacity and the Cs-to-K selectivity coefficient there [5, 10, 14]; αex is the quantity of exchangeable radionuclide sorbed by OMA, which characterizes its fixing ability [6, 20]; αex/RIP(K)ex is the value that characterizes the availability of Cs-137 for plants [24].

Sample OMA mix by % mass Cs-137 selective sorption parameters
SS HL CSS RIP(K)ex, mg-eq/kg αex, % αex/RIP(K)ex•10-4, kg/mg-eq
OMA 1-1 70 20 10 502 32 6.4
OMA 1-3 60 20 20 656 23 3.5
OMA 1-4 80 10 10 408 26 6.4
OMA 2-3 60 20 20 364 24.1 6.6