Single and simultaneous adsorption of Cr(VI) and Cu (II) on a novel Fe3O4/pine cones gel beads nanocomposite: Experiments, characterization and isotherms modeling

Recently, the use of magnetic sorbents has gained a spread attention due to their eco-friendly characteristic, ease separation and low cost. Herein, novel biocomposite sorbent pine cone gel beads (MPCB) was synthetized investigated for single simultaneous removal Cu(II) Cr(VI) from aqueous solution. Pine cones waste materials were first magnetized with Fe3O4 nanoparticles then encapsulated in calcium beads. The physicochemical properties prepared MPCB characterized via scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDX), diffraction Fourier transform infrared spectrometry (FTIR) analysis. influences pH, contact time initial concentration metal ions on sorption process examined. adsorption mechanism investigated; it mainly involved complexation/chelation surface functional groups, electrostatic interaction ion exchange. A physical model adopted attribute new physico-chemical interpretations mechanism. kinetic results showed good correlation pseudo second-order equilibrium data fitted well Langmuir isotherm maximum capacity 68.64 212.22 mg g−1 respectively. In multi-components system, both competitive synergistic effects observed. An antagonism effect exerted by while not affected even slightly enhanced presence Cr(V) ions. behavior analyzed modified which provides fit Cu experimental data. This study proves that hold great promise using as effective potentially toxic metals remediation.