| abstract |
Chalcogenide compounds with cation exchange capability and methods of using the compounds are described. Compounds of the general formula A 2x M x Sn 3-x S 6 are described wherein x is 0.1-0.95, A is Li + , Na + , K + or Rb + and M is Mn 2+ , Mg 2+ , Zn 2+ , Fe 2+ , Co 2+ or Ni 2+ . Compounds of the general formula H 2x M x Sn 3-x S 6 are also described wherein x is 0.1-0.95 and M=Mn 2+ , Mg 2+ , Zn 2+ , Fe 2+ , Co 2+ or Ni 2+ . The compounds can be layered compounds. The compounds are capable of intercalation of Cs + , Sr 2+ , Hg 2+ , Pb 2+ , Cd 2+ , and/or Ag + ions. A process involving contacting the compounds with a solution comprising one or more ions including Cs + , Sr 2+ , Hg 2+ , Pb 2+ , Cd 2+ , and/or Ag + is also provided. The one or more ions can be removed from the solution by the compounds. A process comprising contacting compounds of the general formula A 2x M x Sn 3-x S 6 with a solution containing UO 2 2+ , Th 4+ or Pu 4+ ions is also described. |