Removal Phenol from Aqueous Solutions Using Environmental friendly and Effective Adsorbent onto Mn-doped Fe2O4 nanoparticles loaded on activated carbon

The applicability of Mn-doped Fe2O4 nanoparticles loaded on activated carbon for removing Phenol from aqueous solutions has been reported. This novel material was characterized by different techniques such as FT-IR, XRD and SEM. The influence of nanoparticle dosage, pH of the sample solution, individual Phenol concentration, contact time between the sample and the adsorbent, temperature, and ionic strength of the sample solution were studied by performing a batch adsorption technique. The maximum removal of 5-25 mg L-1 of individual Phenol from an aqueous sample solution at pH 6.0 for Phenol was achieved within 30 min when an adsorbent amount of 0.1 g was used. It was shown that the adsorption of Phenol follows the Langmuir isotherm model best described the experimental adsorption data with maximum adsorption capacities of 4.27 mg/g. The kinetic data were best described by the pseudo-second order model (R2 = 0.9997) explains equilibrium data. Isotherms had also been used to obtain the thermodynamic parameters such as free energy (ΔG0), enthalpy (ΔH0) and entropy (ΔS0) of adsorption. The negative value of (ΔGo, ΔHo and ΔSo) confirmed the sorption process was endothermic reflects the affinity of Mn-doped Fe2O4 nanoparticles loaded on activated carbon functionalized towards Phenol. These results indicate that the pretreatment of Mn-doped Fe2O4 nanoparticles loaded on activated carbon can optimize the removal of Phenol from aqueous solution.