Degradation of the typical herbicide atrazine by UV/persulfate: kinetics and mechanisms

Ji, Xianguo; Yang, Jing; Tang, Wei; Zhu, Yuliang; Wang, Ying; Liu, Yucan; Zhang, Yan; Duan, Jinming; Li, Wei

doi:10.1007/s11356-022-18717-x

Cited by 16 publications

(2 citation statements)

References 46 publications

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“…Under the UV and heat, S 2 O 8 2generated SO 4 • -, which can react with H 2 O in the system and break it down to form •OH (E 0 = 2.8 V) (Eq. ( 9)) (Liu, et al, 2022b). Finally, under the joint action of SO 4 • -, •OH and •O 2 − , ATZ is degraded to produce a series of degradation products in the DBDP/PS synergistic system (Eq.…”

Section: Optimal Degradation Of Atz In the Dbdp/ps Synergistic Systemmentioning

confidence: 99%

Degradation of atrazine in river sediment by dielectric barrier discharge plasma (DBDP) combined with a persulfate (PS) oxidation system: response surface methodology, degradation mechanisms, and pathways

Gao

Deng

et al. 2023

Environ Sci Pollut Res

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Single degradation systems based on dielectric barrier discharge plasma (DBDP) or persulfate (PS) oxidation cannot achieve the desired goals (high degradation e ciency, high mineralization rate and low product toxicity) of degrading atrazine (ATZ) in river sediment. In this study, DBDP was combined with a PS oxidation system (DBDP/PS synergistic system) to degrade ATZ in river sediment. A Box-Behnken design (BBD) design including ve factors (discharge voltage, air ow, initial concentration, oxidizer dose and activator dose) and three levels (-1, 0 and 1) was established to test a mathematical model by response surface methodology (RSM). The results con rmed that the degradation e ciency of ATZ in river sediment was 96.5% in the DBDP/PS synergistic system after 10 min of degradation. The experimental total organic carbon (TOC) removal e ciency results proved that 85.3% of ATZ is mineralized into CO 2 , H 2 O and NH 4 + , which effectively reduces the possible biological toxicity of the intermediate products. Active species (sulfate (SO 4 • − ), hydroxy (•OH) and superoxide (•O 2 − ) radicals) were found to exert positive effects in the DBDP/PS synergistic system and illustrated the degradation mechanism of ATZ. The ATZ degradation pathway, composed of 7 main intermediates, was clari ed by fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometry (GC-MS).This study indicates that the DBDP/PS synergistic system is a highly e cient, environmentally friendly, novel method for the remediation of river sediment containing ATZ pollution.

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Section: Optimal Degradation Of Atz In the Dbdp/ps Synergistic Systemmentioning

confidence: 99%

Degradation of atrazine in river sediment by dielectric barrier discharge plasma (DBDP) combined with a persulfate (PS) oxidation system: response surface methodology, degradation mechanisms, and pathways

Gao

Deng

et al. 2023

Environ Sci Pollut Res

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“…Compared with chlorine disinfection, persulfate disinfection can be activated to generate free radicals with high oxidation potential. Sulfate radicals have strong oxidizing power and are more selective oxidants than HO • (Liu et al 2022, Lutze et al 2015. Methods of persulfate excitation to produce free radicals comprise such as radiation, homogeneous and heterogeneous catalysis, heat, or ultrasound (Zhang et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the disinfection effect and mechanism of SO4•− and HO• UV/persulfate salts

Huang

Zheng²

2023

Environ Sci Pollut Res

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Although ultraviolet (UV) and persulfate (PS) have been widely used in water disinfection process, their incompleteness of disinfection, such as inducing the production of viable but non-culturable cells (VBNC), has attracted extensive attention. In this study, the disinfection effect of combined UV and PS was evaluated from the perspective of inducing Pseudomonas aeruginosa into VBNC, and the roles of SO 4•− and HO • radicals in UV/PS disinfection were also analyzed. UV/PS more effectively inactivated cells and reduced the number of culturable cells, but induced more VBNC cells. On the other hand, the test of bacterial dark activation suggested that UV/PS disinfection effectively prolongs the recovery time of VBNC cells. The mechanisms of UV/PS disinfection were the increase of membrane permeability and oxidative stress, where SO 4•− radicals played more role than HO • radicals. Furthermore, UV/PS disinfection more signi cantly perturbed the metabolism of Pseudomonas aeruginosa (p < 0.05), mainly involving glyoxylate and dicarboxylic acid metabolism, aminoacyl-tRNA biosynthesis, Alanine, aspartate and glutamate metabolism, citric acid cycle (TCA cycle). This study, from the production and recovery of VBNC, provides a new idea for the evaluation of UV, persulfate and their combined disinfection effect, and provides guidance for improving disinfection process.

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Synthetic studies of zinc-doped cadmium aluminum ferrite for the photocatalytic degradation of atrazine

Yasar

2024

Reac Kinet Mech Cat

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Degradation of the typical herbicide atrazine by UV/persulfate: kinetics and mechanisms

Cited by 16 publications

References 46 publications

Degradation of atrazine in river sediment by dielectric barrier discharge plasma (DBDP) combined with a persulfate (PS) oxidation system: response surface methodology, degradation mechanisms, and pathways

Degradation of atrazine in river sediment by dielectric barrier discharge plasma (DBDP) combined with a persulfate (PS) oxidation system: response surface methodology, degradation mechanisms, and pathways

Evaluation of the disinfection effect and mechanism of SO4•− and HO• UV/persulfate salts

Synthetic studies of zinc-doped cadmium aluminum ferrite for the photocatalytic degradation of atrazine

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