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Magnetic Fe and N-doped biochar (FeN-BC) was synthesized from waste bamboo through microwave pyrolysis and used as a catalyst for the degradation of tetracycline hydrochloride (TC) with peroxymonosulfate (PMS). The results showed that doping with Fe improved the recovery performance of biochar and the N-doping enhanced the activity of PMS. Simultaneously, it achieved a high degradation efficiency for TC (93%) under optimized conditions within 30 min. Electron paramagnetic resonance (EPR) and quenching experiments indicated that the main active radicals present in the experiment were SO and •OH. Additionally, FeN-BC demonstrated good catalytic performance in the TC degradation process in a real water environment after five cycles. This work presents a practical strategy for preparing magnetic biochar to degrade organic pollutants from wastewater.
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http://dx.doi.org/10.3390/molecules30112283 | DOI Listing |
Environ Res
September 2025
School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China; School of Ecology and Environment, Hainan University, Haikou 570228, China. Electronic address:
Herein, ball-milled magnetic biochar-vermiculite composite (MBC@VT) and ball-milled magnetic biochar-zeolite composite (MBC@ZT) were synthesized via one-step ball-milling, and their adsorption capacities for Pb(II)/P-nitrophenol (PNP) in water were compared. The results demonstrated that the removal of Pb(II) and PNP through both materials was a complex, endothermic reaction mainly driven by chemisorption, with strong tolerance to pH changes and co-existing ions. MBC@VT showed superior adsorption for Pb(II) (reaching 367.
View Article and Find Full Text PDFRSC Adv
August 2025
Public Works Engineering Department, Faculty of Engineering, Mansoura University Mansoura 35516 Egypt.
This study investigated the degradation of tetracycline (TCN) antibiotic catalytic activation of periodate (PI, IO ) using a novel composite catalyst composed of green-synthesized magnetite nanoparticles supported on water lettuce-derived biochar (MWLB). Characterization results revealed that the magnetic biochar possessed a porous structure, abundant surface functional groups, and high carbon and iron contents. Compared to conventional oxidants such as persulfate, hydrogen peroxide, and peroxymonosulfate, the PI-activated system demonstrated superior degradation efficiency.
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August 2025
Laboratoire de Chimie Minérale Appliquée (LR19ES02), Faculté Des Sciences de Tunis, Université de Tunis El Manar Campus Universitaire El Manar I 2092 Tunis Tunisia.
[This corrects the article DOI: 10.1039/D5RA04120A.].
View Article and Find Full Text PDFiScience
September 2025
Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China.
In this study, MgO-containing magnetic composite biochar (MBC) was prepared from activated corn stover for the efficient removal of Pb. Through the introduction of magnesium and iron ions, the surface and pore structures of the acid-treated corn stover biochar adsorbent were optimized, with its adsorption capacity being enhanced to 253.6 mg g.
View Article and Find Full Text PDFGels
August 2025
Gumushane Vocational School, Gumushane University, Gumushane 29100, Türkiye.
In the present research, a novel magnetic adsorbent was developed via the sol-gel method by coating CuFeO nanoparticles on biochar sourced from brewed tea waste. The synthesized adsorbent was utilized for the removal of Ni(II) ions from aqueous media. The adsorption efficiency of Ni(II) ions was assessed under crucial experimental conditions such as initial solution pH, contact time, adsorbent dosage, and initial Ni(II) concentration.
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