Patent ID: 7737319

Claim:
A method comprising: diluting a radioactive isotope in a filler material; mixing the radioactive isotope diluted in the filler material with a radioactive material treatment composition for at least two minutes to form a resulting mixture, the radioactive material treatment composition including mostly salt, and from 0.5 to 15 wt % sorbent, wherein the sorbent comprises a zeolite; during said mixing, sorbing the radioactive isotope with the sorbent; during said mixing, crystallizing the salt to form a matrix of growing salt crystals around the sorbent that comprises the zeolite and the filler, wherein the matrix of salt crystals formed around the sorbent help to encapsulate the radioactive isotope that has been sorbed by the sorbent; after said mixing the radioactive isotope diluted in the filler material with the radioactive material treatment composition, mixing an inorganic binding agent with the resulting mixture for a period of time with a mixer; hardening the inorganic binding agent around the crystallized salt and around the sorbent.