In:
Materials Research Express, IOP Publishing, Vol. 9, No. 10 ( 2022-10-01), p. 105601-
Abstract:
An advanced magnetic biochar (MBC) was facilely prepared via one-pot FeCl 3 -activation of lotus seedpod. Simultaneous carbonization, activation, and magnetization formed magnetic Fe 3 O 4 nanoparticles and nanowires over the biochar base. The specific surface area (S BET ) and the total pore volume (V total ) of MBC were 349 m 2 g −1 and 0.31 cm 3 g −1 , which were 2.0-fold and 3.9-fold higher than those of biochar, respectively. In addition, the saturation magnetization of MBC reached 6.94 emu g −1 , facilitating its magnetic separation and recovery. In heterogeneous Fenton-like catalytic oxidation, 0.40 g l −1 MBC decolorized 100% Orange G and reduced 58% COD by 350 ppm H 2 O 2 within 120 min. The degradation kinetics were calculated with different MBC samples and reactions followed pseudo-first-order kinetics with the highest rate constant of 0.034 min −1 . Moreover, the catalytic activity dropped by only 6.4% after four reuse cycles, with negligible iron leaching of 1.31–1.44 mg l −1 . Based on these results, MBC could be a low-cost, highly effective, and relatively stable catalyst for treating Orange G in wastewater.
Type of Medium:
Online Resource
ISSN:
2053-1591
DOI:
10.1088/2053-1591/ac9819
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
2760382-9
Permalink