Removal of Phenolics from Wastewater by Fe2O3 Impregnated Sawdust as Adsorbent: Adsorption Isotherm and Kinetic Studies
Keywords:
Sawdust, Magnetic Nano Adsorbent, Phenolic Compounds, Adsorption Isotherm, Adsorption KineticsAbstract
In this study, magnetic nanoparticles (MNPSD) from abundantly available lignocellulosic waste viz. sawdust
was successfully synthesized via co-precipitation method and consequently used for the removal of model
phenolics (Catechol and Resorcinol) from aqueous solution under batch mode method. Batch adsorption studies
revealed irrespective of adsorbate types, higher sorption of such phenolics occurring at acidic pH (pH=3),
contact time of 60mins and at 25ºC. The results obtained from pH studies indicates that electrostatic interaction
may be responsible for the binding of Catechol and Resorcinol onto MNPSD, while film or particle diffusion
mechanisms to be operative during the transfer of such phenolics from the liquid phase. The isotherm outcomes
demonstrated that irrespective of adsorbate types, Langmuir model was operative over the studied phenolics
concentration and kinetics data followed pseudo-second-order model over the entire time frame. Thus, the
experimental results reveal the usefulness of MNPSD as a suitable Nano adsorbent for wastewater treatment.
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