Abstract
The present work aimed to investigate the removal feasibility of organic micropollutants (o-nitrophenol (o-NP) and p-nitrotoluene (p-NT)) from aqueous solutions using an original activated carbon prepared from chicken bones (CAB). The activated carbon is treated with 30% H2O2 and carbonised at 800°C for 3 h. Thus, the obtained CAB is characterised by the way of different physico-analytical methods as X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and the method of Boehm titration. The kinetic experimental data were fitted according to theoretical models: pseudo-first-order, pseudo-second-order, intraparticle diffusion models and the Elovich and Avrami models. The maximum removal obtained for o-NP and p-NT is around ~80% at 5–20 mg/L respectively. The required time for the adsorption equilibrium is between 70 and 145 min. The adsorption kinetics of o-NP and p-NT is tested according to the intraparticle diffusion equations. The results obtained in the present study indicate that the bioadsorbent material CAB is a promising adsorbent for the removal of organic micropollutants from wastewater.
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