Simultaneous Removal of Heavy-Metal Ions by MnO2 Loaded D301 Resin
MnO2-loaded D301 weak basic anion exchange resin was used as adsorbent to simultaneously remove Co2+, Ni2+, Cd2+, Zn2+ and Cu2+ from aqueous solution contained high concentration of alkali and alkaline-earth metals ions. The effects of solution pH and coexistent ions on the adsorption were investigated. The results indicated that Co2+, Ni2+, Cd2+, Zn2+ and Cu2+ can be simultaneously removed in the wide pH range of 3 to 8. The coexistence of PO43− decreased the heavy metal ions removal rate, but for other high concentrations coexistence cations and anions such as Na+, K+, Cl−, NO3−, SO42− and HCO3−, there is no significant impact on removal rate of heavy metals. The adsorption isotherm can be well described by Langmuir isotherm. The adsorption processes followed the pseudo first-order kinetics model. High adsorption capacity makes it a good promising candidate material for simultaneous removal of Co2+, Ni2+, Cd2+, Zn2+ and Cu2+ from aqueous solution with the co-existence of high concentration of alkali and alkaline-earth metals ions.
H. M. Ma et al., "Simultaneous Removal of Heavy-Metal Ions by MnO2 Loaded D301 Resin", Advanced Materials Research, Vols. 255-260, pp. 2791-2796, 2011