Abstract
Herein, magnetic activated carbon (MAC) was prepared via one-pot pyrolysis of FeCl3- and ZnCl2-loaded fallen saman leaves (FSLs). As a result, different metal-based nanoparticles (Fe(0), FeO, Fe3O4, and ZnO) were identified and evenly distributed within the activated carbon (AC) framework. MAC had a high SBET of 479 m2/g, a large Vtotal of 0.30 cm3/g, and a MS of 3.71 emu/g for magnetic separation. For application, 0.100 g/L MAC activated 2.00 mM persulfate (PS) at initial pH 3.0 to rapidly eliminate 96.5 ± 0.4 % of 50 ppm acid red 18 (AR18) within 60 min. Furthermore, quenching experiments indicated that the MAC+PS system might produce both reactive sulfate (SO4•−) and hydroxyl (•OH) radicals during AR18 treatment. Summarily, the findings highlighted the potential of multifunctional FSL-derived MAC due to its magnetic separability and effective PS activation ability towards AR18 degradation.
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