Role of process parameters in the degradation of sulfamethoxazole by heat-activated peroxymonosulfate oxidation: Radical identification and elucidation of the degradation mechanism

Removal of sulfamethoxazole by ferrous iron activation of persulfate: Optimization of dosing strategy and degradation mechanism

“…The UHPLC system was combined with a quadrupole-time-of-flight mass spectrometer (QTOF-MS 6530, Agilent Technologies). The Q-TOF MS system parameters were similar as reported in previous research by the authors (Milh et al, 2021b).…”

“…Next to this, two dimeric products were identified: the SMX dimer (experimental m/z 503.088 (Milh et al, 2021b). Concerning OH-SMX, three possible isomers can exist as shown in Fig.…”

“…TP-283 on the other hand, has a much higher abundance in the TBA experiment. In the literature, it has been stated that the formation of TP-283 is promoted in the presence of techniques that have been investigated so far are: heat-activated PMS oxidation, heat-activated PS oxidation, ferrous iron activation of PMS and ferrous iron activation of PS (discussed in this paper) (Milh et al, 2021b(Milh et al, , 2021a(Milh et al, , 2020. The main reactions taking place in the heat activation of PS and PMS are shown in Eqs.…”

Sulfur vacancies on MoS2 enhanced the activation of peroxymonosulfate through the co-existence of radical and non-radical pathways to degrade organic pollutants in wastewater

“…These vacancies had a good affinity for PMS in water and then could react with each other to generate reactive oxygen species. 33 At the liquid-solid interface, the intermediates were nally evolved into O 2 c À , as shown in formulas (3)(4)(5)(6)(7)(8) and (3-9):…”

“…as shown in formulas(3)(4)(5)(6)(7)(8)(9)(10) and(3)(4)(5)(6)(7)(8)(9)(10)(11); (ii) the vacancies interacted with PMS; 43 and (iii) O 2 c À reduced Mo(VI),44 as shown in formulas(3)(4)(5)(6)(7)(8)(9)(10)(11)(12):2O 2 c À + H 2 O / H 2 O 2 + OH À + 1 O 2 (3-10) O 2 c À +cOH + 2H + / OH À + 1 O 2 (3-11)Mo(VI) + O 2 c À + 2H + / Mo(IV) + 1 O 2(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) …”