Fe⁰-activated persulfate-assisted mechanochemical destruction of expired compound sulfamethoxazole tablets

Abstract

Sulfamethoxazole (SMX) and trimethoprim (TMP) in compound sulfamethoxazole tablets (CSTs) can be degraded effectively by the Fe0-activated persulfate-assisted mechanochemical process.

Disposal of hexabromocyclododecane (HBCD) by grinding assisted with sodium persulfate

“…Our previous study revealed that there were SO 4 c À and cOH were generated in a mechanochemical system that used Fe 0 -activated PS as a co-milling reagent. 20 Therefore, we infer that SO 4 c À and cOH might exist in the NaOH-PS system, and the uctuation of bromine recovery can be interpreted as follows. When the mass of PS was low, NaOH played a major role in the degradation and debromination of HBCD, so, the results were close to the situation in which NaOH was used alone.…”

“…Liu et al used Fe 0 activated PS as a co-milling reagent to dispose of sulfamethoxazole (SMX) and trimethoprim (TMP) and attributed the degradation of SMX and TMP to the generation of SO 4 c À and cOH during the milling process. 20 In addition, the mixture of PS and CaO was effective in the treatment of TBBPA. 21 Huang et al reported the destruction of decabromodiphenyl ether (DBDE) by using mechanochemically activated PS and found that the DBDE converted into CO 2 and Br 2 , with mineralization nally realized.…”

Degradation of Tris(1-chloro-2-propanyl) Phosphate by the Synergistic Effect of Persulfate and Zero-valent Iron During a Mechanochemical Process

“…Under the action of free radicals, the C-Cl bonds of organic pollutants are broken and organic substances gradually become inorganic substances, eventually resulting in mineralization (Cagnetta et al, 2017). In the MC process, zero-valent metals or metal oxides have been used as comilling reagents with persulfate to enhance the MC degradation of pollutants (Liu et al, 2016a, Wang et al, 2019. However, the degradation of chlorinated organic compounds via a MC process with both ZVI and persulfate as co-milling agents has not yet been reported, and the degradation mechanisms remain unclear.…”

Visible light driven heterojunction photocatalysts for removal of organic contaminants and bacterial inactivation

“…C6 is the tautomeric form of C5, which could be generated when the radical attack opened the isoxazole ring (Abellán, Bayarri et al 2007). The appearance of peak at m/z 156.1 (C7, Mw 157) confirmed the occurrence of S-N bond cleavage (Hu, Flanders et al 2007, Trovo, Nogueira et al 2009, Qi, Liu et al 2014, Liu, Zhang et al 2016, while peak at m/z 172.2 (Mw 173) indicates the generation of sulfanilic acid (C9) and/or hydroxyl substituted sulfanilic acid (C10). The radical attack would result in the aniline and isoxazole rings opened and these the organic intermediates would be finally mineralized to CO 2 and H 2 O.…”

“…SMX is one of the top-selling antibiotics in both human and veterinary medicine (Collado, Buttiglieri et al 2013). As a result, SMX is frequently detected in the water cycle including wastewater, surface water as well as drinking water posing threats to both human health and the environment (Ji, Ferronato et al 2014, Li 2014, Schaider, Rudel et al 2014, Liu, Zhang et al 2016. More importantly, SMX presents high concentration among the existing pharmaceuticals classes and has been listed as among the 30 most frequently detected organic wastewater contaminants as reported by the US Geological Survey (Schaider, Rudel et al 2014) as well as the top 10 high priority pharmaceuticals identified in a European assessment of pharmaceutical and personal care products (PPCPs) (Lin, Yu et al 2016).…”