Chemical behaviors and toxic effects of ametryn during the UV/chlorine process

Photoprotective Effects of Selected Amino Acids on Naproxen Photodegradation in Aqueous Media

“…There are various reports showing the effects of UV irradiation on the persistence and biological activities of photosensitive compounds [ 23 , 24 , 25 , 26 , 27 ]. For example, the photoproduct of ametryn, which is one of herbicides, showed a higher acute ecotoxicological effect on Vibrio fischeri [ 23 ], and some photoproducts of cyclophosphamide and ifosfamide, which are categorized as antineoplastic drugs, might have a mutagenic potential in silico toxicity prediction [ 24 ]. On the other hand, the photoproduct of linezolid, which is one of oxazolidinone antibiotics, showed no antibacterial activities [ 25 ].…”

Evaluation of the main active species involved in the TiO2 photocatalytic degradation of ametryn herbicide and its by-products

“…The intermediate with m/z 200 was also proposed by Gozzi et al [75] for the degradation of ametryn by solar photoelectro-Fenton, as well as a metabolite generated from biodegradation of the herbicide by entomopathogenic fungal cosmopolite Metarhizium brunneum ARSEF 2107 [11]. The intermediate with m/z 244 was also identified by Lopez et al [76] and Mascolo et al [77] in the degradation of ametryn by means of sodium hypochlorite and chlorine dioxide disinfectants, and by Yang et al [74] during the UV/chlorine process. Liu et al [78] proposed this intermediate in the heterogeneous reaction of ametryn particles with NO3 radicals.…”

“…[72], Jiang et al [73] and Yang et al [74] found in their studies degradation products for ametryn with the same m/z 186 and m/z 200. The intermediate with m/z 200 was also proposed by Gozzi et al [75] for the degradation of ametryn by solar photoelectro-Fenton, as well as a metabolite generated from biodegradation of the herbicide by entomopathogenic fungal cosmopolite Metarhizium brunneum ARSEF 2107 [11].…”

Experimental study and quantum chemical calculation of free radical reactions in ciprofloxacin degradation during the UV/chlorine oxidation process

“…Increases in the degradation rate constant k app (from 0.0635 s −1 to 0.0305 s −1 ) were seen when the pH value was elevated from 5 to 9, and the half-life t 1/2 was found to decrease from 99 s to 21.3 s. This phenomenon is in contrast with previous research, which found that degradation was more efficient under acidic conditions. 41 Generally speaking, it is assumed that the proportion of HOCl under acidic conditions is higher, resulting in the generation of more reactive free radicals. 41 Furthermore, the species and concentration of free radicals have a large impact on the degradation.…”

“…41 Generally speaking, it is assumed that the proportion of HOCl under acidic conditions is higher, resulting in the generation of more reactive free radicals. 41 Furthermore, the species and concentration of free radicals have a large impact on the degradation. The dissociation of HOCl can be greatly influenced by the solution pH.…”