Degradation of linuron by UV, ozonation, and UV/O3 processes—Effect of anions and reaction mechanism

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

“…Ozonation assisted by UV radiation uses UV photons to accelerate O 3 molecules to produce strong ·OH (Glaze et al 1987 (Rao and Chu 2010). This system contains two components, which are UV radiation and O 3 , to oxidize pollutants.…”

Abiotic Degradations/Transformations of EDCs through Oxidation Processes

“…The degradation pathway proposed initial ⋅ OH and ⋅ H radicals attacking the aliphatic chain of DEHP producing intermediates such as mono(2-ethylhexyl)phthalate (MEHP), p-hydroxy-(2-ethylhexyl)benzoate, 2-ethylhexylbenzoate, monobutylphthalate (MBP), and phthalic and benzoic acids (Chung and Chen, 2009). The major mechanism for linuron decay in the photolysis under the irradiation of UV at 254 nm was found to be N-terminus demethoxylation, photohydrolysis with or without dechlorination, and N-terminus demethylation (Fig 10.25) (Rao and Chu, 2010). The intermediates formed during the photocatalytic degradation of DEHP are shown in Figure 10.24.…”

“…25 Degradation pathways of linuron by ozonation and UV/O 3 processes(Rao and Chu, 2010). Solid arrows indicate UV/O 3 process, while dashed arrows indicate ozonation.…”

Kinetic studies of the reaction between pesticides and hydroxyl radical generated by laser flash photolysis

“…AOPs typically employ chemical oxidizing agents in the presence of suitable catalysts and/or ultraviolet light to oxidize and degrade the target compound . The major types of AOPs that have been proposed in the literature include [oxidant (catalyst, if present)/light]: H 2 O 2 /UV, O 3 /UV, O 3 ‐H 2 O 2 /UV, TiO 2 /UV, Fe(III)/TiO 2 /UV–visible, direct photolysis of water by vacuum ultraviolet light (VUV), Fenton reaction or H 2 O 2 ‐Fe(II), and the photo‐Fenton reaction or H 2 O 2 [Fe(II)/Fe(III)]/UV …”