Peroxymonosulfate activation by tea residue biochar loaded with Fe₃O₄ for the degradation of tetracycline hydrochloride: performance and reaction mechanism

Abstract

The prepared tea residue biochar loaded with Fe3O4 has high-efficiency and environmental potential for activating peroxymonosulfate to degrade tetracycline hydrochloride.

Co-catalysis of trace dissolved Fe(iii) with biochar in hydrogen peroxide activation for enhanced oxidation of pollutants

“…[1][2][3] Recently, biochar has been found to be an attractive catalyst for advanced oxidation of pollutants. [4][5][6] Specically, biochar can activate H 2 O 2 , 7-10 and persulfates [11][12][13] to produce reactive oxygen species (ROS) such as the hydroxyl radical (cOH), sulfate radical (SO 4 c À ) and singlet oxygen ( 1 O 2 ), which are powerful oxidants (e.g. E q (cOH/H 2 O) ¼ 2.73 V) capable of mineralization of various organic pollutants.…”

Double charge transfer mechanistic insights into the tailoring of BiOI nanoplates and boron-doped graphitic carbon nitride: a 2D/2D anchored p–n heterojunction nanocatalyst for improved photodegradation

“…As evident from the degradation pathway, the intermediate products with m/z 172, 136, 127, 117, and 86 are formed through ring opening, cleavage of the ring with hydroxylation and deprotonation. 73,79 The molecules with less m/z values may be subsequently degraded into less hazardous products such as carbon dioxide and water.…”

Preparation of magnetic copper ferrite nanoparticle as peroxymonosulfate activating catalyst for effective degradation of levofloxacin

“…The magnetic property of CuFe 2 O 4 catalyst was measured by VSM at room temperature and obtained magnetization hysteresis loop was shown in Figure 6. Obviously, the magnetization curve with closed S-shaped pass through the coordinate origin, which indicated that the catalyst has paramagnetism and reversible magnetization state, and is a soft magnetic material (Wang et al 2021). It could be seen from the figure that the magnetization curve of CuFe 2 O 4 catalyst was close to the saturation magnetization region when the magnetic field was applied in the forward and reverse directions.…”

“…Under the condition of constant catalyst dosage and PMS concentration, a certain amount of reactive species was provided. It indicated that effective reaction probability decreased with the increasing initial concentration of LEV(Wang et al 2021). Notably, with the progress of reaction time, the LEV degradation efficiency at different LEV initial concentration inclined to the same.…”