Degradation of neurotoxin β-N-methylamino-L-alanine by UV254 activated persulfate: Kinetic model and reaction pathways

Yan, Binbin; Xu, Duo; Liu, Zhiquan; Tang, Jiangzhou; Huang, Rui; Zhang, Min; Cui, Fuyi; Shi, Wenxin; Hu, Chun

doi:10.1016/j.cej.2020.127041

Cited by 17 publications

(4 citation statements)

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“…As the PMS concentration increased, the scavenging rate of SO 4 − ˙ might have been faster than the production rate, leading to a decrease in the concentration of SO 4 − ˙, and therefore, the removal of CTH could have become inhibited. 33,34 SO 4 − ˙ + SO 4 − ˙ → S 2 O 8 2− SO 4 − ˙ + S 2 O 8 2− → SO 4 2− + S 2 O 8 − ˙ …”

Section: Resultsmentioning

confidence: 99%

“… 42 Since the rate constant of the reaction between SO 4 − ˙ and OH − is 5 orders of magnitude greater than that between SO 4 − ˙ and water, alkaline conditions could promote the generation of OH˙ in the system. 33 Nevertheless, inhibition experiments 43 have shown that SO 4 − ˙ and OH˙ play a major role under weakly basic conditions (pH < 9), but OH˙ and 1 O 2 are the main active species under strongly basic conditions (pH > 9). 44,45 PMS was activated by the base to produce 1 O 2 , which removed CTH [ eqn (4)–(14) ].…”

Section: Resultsmentioning

confidence: 99%

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UV-enhanced nano-nickel ferrite-activated peroxymonosulfate for the degradation of chlortetracycline hydrochloride in aqueous solution

Zhang

Wang

et al. 2021

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

UV-enhanced nano-nickel ferrite-activated peroxymonosulfate for the degradation of chlortetracycline hydrochloride in aqueous solution

Zhang

Wang

et al. 2021

RSC Adv.

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“…This suggests that the alkalinity induced by HCO the inhibition of the water matrix. 13,47 The log reduction values obtained from the inactivation experiments in carbonfiltered and surface water were 3.35 and 2.73, respectively (Fig. 7c), indicating a substantial inactivation effect in both cases.…”

mentioning

confidence: 92%

Unveiling a potential disinfection process in ultraviolet treatment of bromine-containing water: inactivation of P. aeruginosa in a UV/NH₂Br system

Zhu,

Yang,

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…Yan et al 2021) The decrease of degradation rate of BMAA at pH above 8 was attributed to the electrostatic repulsion between SO 4•and BMAAhindering particle collision in the UV/PS system, but •OH and ozone molecule is not charged. Nevertheless, •OH could react with OHto form , which has a weaker oxidation ability than •OH (Nosaka and Nosaka 2017).…”

mentioning

confidence: 97%

Degradation of cyanobacterial neurotoxin β-N-methylamino-l-alanine (BMAA) using ozone process: influencing factors and mechanism

Yan

Han

Liu

et al. 2023

Environ Sci Pollut Res

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β-N-methylamino-L-alanine (BMAA) is a new kind of cyanobacterial neurotoxin, which is widely present in water sources contaminated by algae and may threaten human health through drinking water. The ozone process is an advanced water treatment process widely used in drinking water treatment plants. In this work, the effectiveness of ozone oxidative degradation of BMAA was systematically explored, and the effect of operating parameters on the effectiveness of ozone oxidative degradation of BMAA was investigated, and the degradation mechanism of ozone oxidative degradation of BMAA was speculated.The results showed that BMAA could be quickly eliminated by ozone, and the removal rates of BMAA were nearly 100% in pure water, but the removal rates were reduced in actual water. BMAA was primarily degraded by direct oxidation of ozone molecules in acidic and near-neutral conditions, and indirect oxidation of •OH accounted for the main part under strong alkaline conditions. The pH value had a signi cant effect on the decomposition of BMAA, and the degradation rate of BMAA was fastest at near neutral pH value. The degradation rates of TOC were signi cantly lower than that of BMAA, indicating that by-products were generated during the degradation process. Three by-products ([M-H] + = 105, 90 and 88) were identi ed by UPLC-MS/MS and the degradation pathways of BMAA were proposed. The production of by-products was attributed to the fracture of the C-N bonds. This work is helpful for the indepth understanding on the mechanism and demonstration of the feasibility of the oxidation of BMAA by the ozone process.

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Degradation of neurotoxin β-N-methylamino-L-alanine by UV254 activated persulfate: Kinetic model and reaction pathways

Cited by 17 publications

References 56 publications

UV-enhanced nano-nickel ferrite-activated peroxymonosulfate for the degradation of chlortetracycline hydrochloride in aqueous solution

UV-enhanced nano-nickel ferrite-activated peroxymonosulfate for the degradation of chlortetracycline hydrochloride in aqueous solution

Unveiling a potential disinfection process in ultraviolet treatment of bromine-containing water: inactivation of P. aeruginosa in a UV/NH₂Br system

Degradation of cyanobacterial neurotoxin β-N-methylamino-l-alanine (BMAA) using ozone process: influencing factors and mechanism

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Degradation of neurotoxin β-N-methylamino-L-alanine by UV254 activated persulfate: Kinetic model and reaction pathways

Cited by 17 publications

References 56 publications

UV-enhanced nano-nickel ferrite-activated peroxymonosulfate for the degradation of chlortetracycline hydrochloride in aqueous solution

UV-enhanced nano-nickel ferrite-activated peroxymonosulfate for the degradation of chlortetracycline hydrochloride in aqueous solution

Unveiling a potential disinfection process in ultraviolet treatment of bromine-containing water: inactivation of P. aeruginosa in a UV/NH2Br system

Degradation of cyanobacterial neurotoxin β-N-methylamino-l-alanine (BMAA) using ozone process: influencing factors and mechanism

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Unveiling a potential disinfection process in ultraviolet treatment of bromine-containing water: inactivation of P. aeruginosa in a UV/NH₂Br system