Biosorption of Cu(II) and Zn(II) ions from aqueous solution by a new sorbent prepared fromHydrilla verticillataand Fe3O4nanoparticles: one-component and binary systems

Abstract

AbstractThe biosorption characteristics of Cu(II) and Zn(II) ions from aqueous solution by a magnetic nanosorbent (MNP–Hydrilla verticillata powder (HVP)) prepared from HVP and Fe3O4 nanoparticles were investigated from single and binary component systems. Optimum biosorption conditions were determined as a function of pH, contact time, and temperature. The results showed that the pH for optimum sorption was 5.0 for Cu(II) and Zn(II) ions. Equilibrium sorption isotherms were measured for the single component system, and the experimental data were analyzed using Langmuir, Freundlich, Dubinin–Radushkevich, Brunauer–Emmett–Teller, and Tempkin models. The Langmuir isotherm described the biosorption of Cu(II) and Zn(II) ions onto MNP–HVP biomass (R2 = 0.982 and 0.980) better than the other four isotherms. The maximum biosorption capacity of MNP–HVP biomass was 66.67 mg/g for Cu(II) ion and 72.20 mg/g for Zn(II) ion. Biosorption equilibrium for binary systems showed that MNP–HVP had easier access for Cu(II) bio...