SciELO - Scientific Electronic Library Online

 
vol.36 número4Synthesis of silver impregnated carbon nanotubes and cyclodextrin polyurethanes for the disinfection of waterThe effect of silica concentration on the biosorption of Cu2+ and Co2+ from aqueous solutions mediated by strains of Bacillus índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • En proceso de indezaciónSimilares en Google

Compartir


Water SA

versión On-line ISSN 0378-4738

Resumen

MAMBA, BB; NYEMBE, DW  y  MULABA-BAFUBIANDI, AF. The effect of conditioning with NaCl, KCl and HCl on the performance of natural clinoptilolite's removal efficiency of Cu2+ and Co2+ from Co/Cu synthetic solutions. Water SA [online]. 2010, vol.36, n.4, pp. 0-0. ISSN 0378-4738.

Southern African clinoptilolite's capability as an ion-exchanger with respect to Cu2+ and Co2+ was investigated in order to consider its viability in the removal of metal cations from aqueous solutions. The effect of chemical conditioning was investigated using sodium chloride (NaCl), hydrochloric acid (HCl) and potassium chloride (KCl). The most efficient activating or conditioning reagent was found to be HCl at 0.02 M concentration, followed by KCl at 0.04 M and then NaCl at 0.04 M. The worst performing clinoptilolite was the original form under the conditions described in this study and it thus served as a control. The HCl-conditioned clinoptilolite was the most efficient in metal removal (79% Co2+ and 73% Cu2+) followed by the NaCl-conditioned form (69% Co2+ and 54% Cu2+), while the KCl-conditioned form adsorbed 54% and 73% of Co2+ and Cu2+, respectively. The column method was used for the cation-exchange processes with synthetic solutions of 0.0020 M, 0.0698 M and 0.2000 M of Co2+ and Cu2+ concentrations which were measured using atomic absorption spectroscopy (AAS).

Palabras clave : clinoptilolite; chemical conditioning; ion-exchange; copper and cobalt.

        · texto en Inglés     · Inglés ( pdf )