Title of article :
Sorption of heavy metal ions by silica gel-immobilized, proton-ionizable calix[4]arenes
Author/Authors :
Wang، نويسنده , , Jing and Zhang، نويسنده , , Dongmei and Lawson، نويسنده , , Thomas R. and Bartsch، نويسنده , , Richard A.، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2009
Abstract :
Silica gel-immobilized, di-ionizable calix[4]arenes are employed as stationary phases in ion-exchange chromatography for selected heavy metal ions. Sorption efficiencies for Pb2+ are dependent on the structure of the calix[4]arene ligand and the linker that joins the ligand to the silica gel, as well as the acidity of the sample solution. Although the resins exhibit only poor sorption of Cd2+, they are found to be scavengers for Hg2+. Competitive sorption studies are conducted with selected resins.
Keywords :
Heavy metal ions , Ion-exchange , Sorption