College of Environmental Science and Engineering, Guangxi University, Nanning 530004, China.
College of Environmental Science and Engineering, Guangxi University, Nanning 530004, China.
Bioresour Technol. 2015 Jun;186:360-364. doi: 10.1016/j.biortech.2015.03.139. Epub 2015 Mar 31.
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 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 41.5 mg g(-1)) was only found in the first regeneration cycle. Magnetic separation performance of adsorbents was not significantly affected by multiple regeneration cycles.
以 EDTA-2Na 为再生剂研究了用桉树叶残渣制备的负载 Pb 的磁性生物炭的再生。结果发现，在 120 min 内铁浸出量为 1.1 mg g(-1)时，解吸效率为 84.1%。在 6 次再生循环中，再生磁性生物炭的 SBET 和孔体积均较高，FTIR 光谱中没有出现明显的带位移。在第一个再生循环中，仅发现 Pb(II)吸附容量（从 52.4 降至 41.5 mg g(-1)）降低。多次再生循环对吸附剂的磁性分离性能没有显著影响。
