The ability of immobilized humin biomass to bind heavy metals under flow conditions: Batch and column interference studies
Previous batch experiments demonstrated the heavy metal binding capability of humin biomass. In this investigation batch experiments were performed to determine Ca and Mg interference in heavy metal binding of Pb, Cu, Cd, Ni, and Zn to silica-immobilized humin biomass. The experiments were performed for single and multi-metal solutions. For single metal solution, the interference effect of hard cations on heavy metal binding to a humin biopolymer was primarily due to Ca(II), where the interference increased as the concentration of the calcium increased. The batch interference studies for Pb and Cu showed the same trend; however, the interference effect of Ca(II) on Pb binding was smaller compared to Cu. The selectivity shown by humin for a single metal solution was Pb > Cu > Ca > Mg. However for multi-metal solutions, Mg(II) did not interfere greatly with the Cu(II) and Pb(II) binding, but Ca(II) did reduce Cd, Ni, and Zn binding to the biomass by 50, 48, and 62%, respectively. (Abstract shortened by UMI.)
Analytical chemistry|Environmental engineering
Contreras, Carolina, "The ability of immobilized humin biomass to bind heavy metals under flow conditions: Batch and column interference studies" (2003). ETD Collection for University of Texas, El Paso. AAIEP10355.