Journal
BIORESOURCE TECHNOLOGY
Volume 186, Issue -, Pages 360-364Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.03.139
Keywords
Magnetic biochar; Lead adsorption; Adsorbent regeneration; Separation
Funding
- National Natural Science Foundation of China [51168001]
- Special Fund from the Central Government of China for Heavy Metal Pollution Prevention [20140944]
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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 120 min with iron leaching amount of 1.1 mg g(-1). Higher S-BET 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 41.5 mg g(-1)) was only found in the first regeneration cycle. Magnetic separation performance of adsorbents was not significantly affected by multiple regeneration cycles. (C) 2015 Elsevier Ltd. All rights reserved.
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