The catalytic destruction of antibiotic tetracycline by sulfur-doped manganese oxide (S–MgO) nanoparticles

The catalytic ozonation of diazinon using nano-MgO@CNT@Gr as a new heterogenous catalyst: the optimization of effective factors by response surface methodology

“…19,23 Thus, herein, a new hybrid catalyst was synthesized via the combination of three materials in three steps: mixing, sintering, and granulation. In this work, nano-MgO, which was previously found to be effective in the degradation of refractory organic pollutants 19,20,24,25 due to its high activity, 26,27 chemical stability, 25,26 and environmental friendliness, 19,28,29 was selected as the main part of the new catalyst. Graphite (Gr) was used as a catalyst support and provided catalyst reinforcement and porosity.…”

Pyrite nanoparticles derived from mine waste as efficient catalyst for the activation of persulfates for degradation of tetracycline

“…The TTC removal efficiency of 98.3 % for the pyrite/PMS process was obtained in the absence of radical scavengers at 30 min reaction time. By adding tert-butanol to the [1,6,7,65]. According to the reaction rate constants, it can be concluded that the selectivity of OH • for tert-butanol is about 1000 times higher than that of SO •− 4 , while this ratio was significantly lower (by about 100 times) for ethanol.…”

“…In recent decades, the presence of organic recalcitrant matter such as pharmaceutical compounds (PCs) as emerging contaminants in water has attracted increasing attention [1][2][3][4]. The prevalence of these refractory contaminants has unexpected and sublethal chronic effects on human beings and ecosystems [5][6][7]. In recent years, advanced oxidation processes (AOPs) based on sulfate radicals (SO •− 4 ) have gained attention for the degradation of recalcitrant pollutants [8][9][10].…”

Use of mine waste for H2O2-assisted heterogeneous Fenton-like degradation of tetracycline by natural pyrite nanoparticles: Catalyst characterization, degradation mechanism, operational parameters and cytotoxicity assessment

“…However, the reduction of decomposition in the presence of these two alcoholic scavengers is not outstanding. The reaction rate constant of TTC with OH is 7.7 Â 10 9 M À1 s À1 (Wols and Hofman-Caris, 2012), while in the presence of the TB and MT the reaction rate constants are 6 Â 10 8 M À1 s À1 and 9 Â 10 8 M À1 s À1 , respectively (Moussavi et al, 2016(Moussavi et al, , 2018a. That is why another OH scavenger was used for proving the OH generation.…”

“…Moreover, in solutions with a higher temperature the diffusion coefficients and mass transfer increase due to lower liquid viscosity. So, the increase in TTC degradation with increasing solution temperature can be due to the increase of TTC diffusion rates and mass transfer along with the effective collision between the TTC molecules in the bulk solution and oxidative agents (Moussavi et al, 2018a). As a result, a higher temperature has a positive effect on the TTC removal in the pyrite/H 2 O 2 process, suggesting that heat act as OH promoter.…”