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Regeneration of magnetic biochar derived from eucalyptus leaf residue for lead(II) removal
- Wang, Sheng-ye, Tang, Yan-kui, Chen, Cheng, Wu, Jin-tao, Huang, Zhining, Mo, Ya-yuan, Zhang, Kai-xuan, Chen, Ji-bo
- Bioresource technology 2015 v.186 pp. 360-364
- Eucalyptus, Fourier transform infrared spectroscopy, adsorbents, adsorption, biochar, desorption, leaching, lead, leaves, magnetic separation
- Regeneration of Pb-loaded magnetic biochar prepared with eucalypts leaf residue was studied by using EDTA-2Na as a regenerant. The desorption efficiency was found to be 84.1% in 120min with iron leaching amount of 1.1mgg−1. Higher SBET and pore volume were observed in regenerated magnetic biochars and no significant band shifts occurred in FTIR spectra during 6 regeneration cycles. The decrease of Pb(II) adsorption capacity (from 52.4 to 41.5mgg−1) was only found in the first regeneration cycle. Magnetic separation performance of adsorbents was not significantly affected by multiple regeneration cycles.