Synergistic effect of ozonation and ionizing radiation for PVA decomposition

Sun, Weihua; Chen, Lüjun; Zhang, Yongming; Wang, Jianlong

doi:10.1016/j.jes.2015.01.020

Cited by 33 publications

(7 citation statements)

References 19 publications

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“…60 Co-γ irradiation, which could produce free radicals, such as • H and • OH, can decomposed many organic compounds (Qinet al, 2006). The active radicals can have reacted with substances which have chemical stability and are not easy to be degrade (Sun et al, 2015, Anbar and Neta, 1967, Gao et al, 2017). Hence, 60 Co-γ irradiation methods were used to degrade acephate (Chen et al, 2008, Yang et al, 2015, Gao et al, 2015, Ong et al, 2017, Samad et al, 2017, Zaidi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The mechanisms and process of acephate degradation by hydroxyl radical and hydrated electron

Huang

Zhao

Hung

et al. 2018

Saudi Journal of Biological Sciences

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The degradation process of acephate in aqueous solution with OH and [Formula: see text] produced byCo-γ irradiation and electron pulse radiolysis was studied in the present paper. In the aqueous solution, acephate reacted with [Formula: see text] and transformed to transient species which can absorb weakly in the wavelength range of 300-400 nm and decay very fast. According to the decay of hydrated electron, the reaction rate constant of [Formula: see text] and acephate is (3.51 ± 0.076) × 10 dm·mol·s. The transient species produced in the reaction of OH and acephate do not distinctly absorb the light in the wavelength range of 300-700 nm, so the decay and kinetics of the transient species cannot determinedirectly. The competing reaction of KSCN oracephate withOH were studied to obtain the reaction rate constant of OH and acephate, which is (9.1 ± 0.11) × 10 dm·mol·s. Although acetylamide and inorganic ions were determined in the products of the reaction of acephate with OH or [Formula: see text], the concentration of inorganic ions in the products of the reaction of acephate withOH is higher than that in the product of the reaction of acephate with [Formula: see text]. Moreover, there were sulfide in the products of the reaction of acephatewith [Formula: see text]. The degradation pathways of acephate by OH and [Formula: see text] were also proposed based on the products from GC-MS.

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Section: Introductionmentioning

confidence: 99%

The mechanisms and process of acephate degradation by hydroxyl radical and hydrated electron

Huang

Zhao

Hung

et al. 2018

Saudi Journal of Biological Sciences

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“…The degradation of acephate mainly involves the destruction of N-C, P-N, P-S, or P-O bonds and the generation of the main intermediate products O -methl- N -acetylphosphoramidate and the more toxic methamidophos (as shown in Figure 2 ). Previous researchers have used 60 Co irradiation, which has led to many studies on the degradation efficiency, degradation pathways, and degradation dynamics ( Sun et al, 2015 ; Yang et al, 2015 ; Huang et al, 2018 ). Chemical degradation mainly results in the generation of free radicals in the medium, such as

and negative hydrogen ions (•H) and hydroxyl radicals (•OH) ( Yang et al, 2015 ).…”

Section: Physicochemical Degradation Methods Of Acephate and Methamidmentioning

confidence: 99%

Degradation of Acephate and Its Intermediate Methamidophos: Mechanisms and Biochemical Pathways

et al. 2020

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“…Due to the synergistic effect of combination processes like AOPs, the rate of degradation of a pollutant can be increased. The synergistic effect of AOPs has been assessed in various studies (37)(38)(39).…”

Section: Effects Of Zno Nanoparticles On Removal Of Blue Cat 41 In Ulmentioning

confidence: 99%

Removal of blue cat 41 dye from aqueous solutions with ZnO nanoparticles in combination with US and US-H2O2 advanced oxidation processes

Golmohammadi¹,

Ahmadpour

Mohammadi

et al. 2016

Environ health eng manag

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Background: The purpose of the present study was to assess the efficiency of ultrasound/hydrogen peroxide processes and ultrasound/hydrogen peroxide/ZnO nanoparticles in the removal of blue cat 41 dye from aqueous solutions. Methods: ZnO nanoparticles were prepared using the hydrothermal method. Variables including pH, concentration of ZnO nanoparticles, initial dye concentration, concentration of hydrogen peroxide, and contact time were investigated. Results: H 2 O 2 alone is not effective in dye removal. In conditions of H 2 O 2 = 20 mg/L and US = 30 kHz, removal efficiency rates of 6.5%, 23.5%, 30%, 51.8%, and 55%, respectively, were obtained. The maximum removal efficiency rate was obtained at the nanoparticle concentration of 3 g/l. Also, removal efficiency was reduced when the initial dye concentration was increased. Conclusion: The combination of nanoparticles and US and H 2 O 2 is very effective in removing blue cat 41 dye. As a result, photo catalytic processes can be considered to effectively remove environmental pollutants.

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Synergistic effect of ozonation and ionizing radiation for PVA decomposition

Cited by 33 publications

References 19 publications

The mechanisms and process of acephate degradation by hydroxyl radical and hydrated electron

The mechanisms and process of acephate degradation by hydroxyl radical and hydrated electron

Degradation of Acephate and Its Intermediate Methamidophos: Mechanisms and Biochemical Pathways

Removal of blue cat 41 dye from aqueous solutions with ZnO nanoparticles in combination with US and US-H2O2 advanced oxidation processes

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