Degradation of 4-aminophenol by hydrogen peroxide oxidation using enzyme from Serratia marcescens as catalyst

Sun, Min; Yao, Risheng; You, Ye‐Zi; Deng, Shengsong; Wen-xia, Gao

doi:10.1007/s11783-007-0018-0

Cited by 23 publications

(10 citation statements)

References 4 publications

(2 reference statements)

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“…The generated (•OH) radicals have an oxidising potential of 2.6V and are capable of degrading a wide range of organics, including phenolic compounds (Siedlecka & Stepnowski, ). Moreover, 4‐aminophenol was successfully degraded by enzyme/H 2 O 2 treatment (M. Sun et al ., ). The authors proposed a degradation pathway of 4‐aminophenol and showed that during the earlier part of the process, 4‐aminophenol was initially converted to p‐benzoquinone and NH 3 ; later, the ring was cleaved with the formation of maleic acid, fumaleic acid and oxalic acid; finally, the organic acids were further oxidised to CO 2 and H 2 O.…”

Section: Resultsmentioning

confidence: 97%

The effect of hydrogen peroxide bleaching of canola meal on product colour, dry matter and protein extractability and molecular weight profile

El-Kadiri

Khelifi

Aïder

2013

Int J of Food Sci Tech

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The aim of this study was to bleach canola meal by hydrogen peroxide to understand the treatment effect on product colour, dry matter and nitrogen extractability. Meal suspensions at 2.5%, 5% and 10% (w/v) were treated in 3, 6 and 10% H 2 O 2 at pH 3, 7 and 10. The bleached meal was extracted under acidic and alkaline conditions. The results showed a high bleaching effectiveness of canola meal by H 2 O 2 . The L* parameter was increased from 47.18 AE 0.56 up to 86.80 AE 1.05. Effect of pH was significant and the highly bleached meal was obtained at pH 10. Extractability of dry matter was increased when the meal was treated with H 2 O 2 , from 26.87 AE 0.10% for the control meal up to 83.20 AE 0.59% for the meal treated in 10% H 2 O 2 in a 2.5% (w/v) suspension. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis showed a depolymerisation effect of H 2 O 2 on the high molecular weight proteins.

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Section: Resultsmentioning

confidence: 97%

The effect of hydrogen peroxide bleaching of canola meal on product colour, dry matter and protein extractability and molecular weight profile

El-Kadiri

Khelifi

Aïder

2013

Int J of Food Sci Tech

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“…Processes 2021, 9, x FOR PEER REVIEW 6 of 17 presence of Cu 2+ [82,83]. The Cu/Fe surface atomic ratio was 0.22, which was lower than the theoretical value of 0.5, indicating that Fe ions were segregated to the CFNS surface.…”

Section: Asphaltene Adsorption/desorption Experimentsmentioning

confidence: 84%

“…The second peak occurred at 711.3 eV, between the first peak and its satellite, indicating the presence of Fe3+ cations in more than one coordination environment, that is, A sites at a higher BE (second peak) and B sites at a lower BE (first peak)[81]. The Cu 2p3/2 profile showed two peaks at 932.3 and 933.5 eV, assigned to reduce copper species (Cu 0 /Cu + ) and Cu 2+ , respectively, and a shake-up satellite at around 942 eV, indicating the presence of Cu 2+[82,83]. The Cu/Fe surface atomic ratio was 0.22, which was lower than the theoretical value of 0.5, indicating that Fe ions were segregated to the CFNS surface.Figure1fdepicts the M-H curve of CFNS.…”

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confidence: 99%

Extra-Heavy Crude Oil Viscosity Reduction Using and Reusing Magnetic Copper Ferrite Nanospheres

et al. 2021

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The main objective of this study is the synthesis, use, and reuse of magnetic copper ferrite nanospheres (CFNS) for extra-heavy oil viscosity reduction. The CFNS were synthesized using a solvothermal method resulting in mean particle size of 150 nm. Interactions of CFNS with the crude oil were evaluated through asphaltene adsorption isotherms, as well as static and dynamic rheology measurements for two cycles at 25 °C. Adsorption and desorption experiments corroborated that most of the asphaltenes adsorbed can be removed for nanoparticle reuse. During the rheology tests, nanoparticles were evaluated in the first cycle at different concentrations from 300 to 1500 mg/L, leading to the highest degree of viscosity reduction of 18% at 500 mg/L. SiO2 nanoparticles were evaluated for comparison issues, obtaining similar results regarding the viscosity reduction. After measurements, the CFNS were removed with a magnet, washed with toluene, and further dried for the second cycle of viscosity reduction. Rheology tests were performed for a second time at a fixed concentration of 500 mg/L, and slight differences were observed regarding the first cycle. Finally, changes in the extra-heavy oil microstructure upon CFNS addition were observed according to the significant decrease in elastic and viscous moduli.

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“…[30] The paminophenol shows the maximum absorption around 230 due to B-absorption band. [31] We took this as reference to study the degradation of p-nitrophenol and the formation of paminophenol. We had taken the UV-visible spectra of reaction mixture after regular interval of time and find that there was a slow decrease in the absorbance of p-nitrophenol at 400 nm and at same time slow rise in the absorbance around 240 nm.…”

Section: Study Of Catalytic Activitymentioning

confidence: 99%

One-Pot Green Synthesis of Ni Nanoparticles and Study of Its Catalytic Activity in the Hydrothermal Reduction of p-Nitrophenol

Suramwar¹,

Thakare²,

Khaty³

2012

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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One-pot synthesis of Ni nanoparticles was carried by solution reduction process successfully in aqueous media by using hydrazine hydrate as a reducing agent. Greener stabilizing agent starch is used as a stabilizer, which also acts as a particle protector toward oxidation. The morphologies of the synthesized Ni nanoparticles were characterized by TEM and XRD. The prepared Ni nanoparticles were used as a catalyst in the reduction of p-nitrophenol to p-aminophenol under hydrothermal condition in the presence of sodium borohydrate as a source of hydrogen. The conversion was excellent (97%), as confirmed by LCMS. This also confirmed by the UV-visible spectrum study of the reaction mixture. The Ni nanoparticles were recycled at least five times without much loss in the catalytic activity.

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Degradation of 4-aminophenol by hydrogen peroxide oxidation using enzyme from Serratia marcescens as catalyst

Cited by 23 publications

References 4 publications

The effect of hydrogen peroxide bleaching of canola meal on product colour, dry matter and protein extractability and molecular weight profile

The effect of hydrogen peroxide bleaching of canola meal on product colour, dry matter and protein extractability and molecular weight profile

Extra-Heavy Crude Oil Viscosity Reduction Using and Reusing Magnetic Copper Ferrite Nanospheres

One-Pot Green Synthesis of Ni Nanoparticles and Study of Its Catalytic Activity in the Hydrothermal Reduction of p-Nitrophenol

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