Removal of 4-chlorophenol by soybean peroxidase and hydrogen peroxide in a discontinuous tank reactor

Bódalo, A.; Gómez, E.; Hidalgo, A.M.; Gómez, M.; Yelo, Ana M.

doi:10.1016/j.desal.2005.11.017

Cited by 21 publications

(9 citation statements)

References 19 publications

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“…After 60 days of storage, immobilized SBP maintained 96% of its initial activity, in good agreement with the results obtained in a previous study [41]. Two experimental series were carried out with the enzyme: The first series utilized different 4-CP concentrations ranging from 50 to 500 mg L −1 and a fixed enzyme concentration of 5 mg L −1 , an effective value utilized in previous studies [14,40]. The second series of experiments used a fixed 4-CP concentration of 250 mg L −1 and variable enzyme concentrations from 5 to 20 mg L −1 .…”

Section: Excilamp and Enzymatic Treatmentsupporting

confidence: 68%

“…Samples were taken at various time intervals during treatment and analyzed for residual 4-CP concentration and by-products. In the assays with free SBP, catalase was added to each sample in order to stop the progress of the reaction as in previous work [40]. In the case of immobilized systems, a nylon mesh (10 m) was placed at the extreme of the syringe used to take samples to prevent passage of the glass beads with the enzyme, or, the polymer into the aliquots for analyses.…”

Section: Excilamp and Enzymatic Treatmentmentioning

confidence: 99%

“…These methods involve enzymatic treatment using free and immobilized soybean peroxidase (SBP) [40,41] and photodegradation treatment using a KrCl excilamp [37]. Their comparative study is a first step in the further development of combination photochemical-enzymatic treatment, similar but essentially different from the commonly and widely used photochemical-biological treatments.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of alternative treatments for 4-chlorophenol removal from aqueous solutions: Use of free and immobilized soybean peroxidase and KrCl excilamp

Gómez

Matafonova

Batoev

et al. 2009

Journal of Hazardous Materials

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Section: Excilamp and Enzymatic Treatmentsupporting

confidence: 68%

Section: Excilamp and Enzymatic Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of alternative treatments for 4-chlorophenol removal from aqueous solutions: Use of free and immobilized soybean peroxidase and KrCl excilamp

Gómez

Matafonova

Batoev

et al. 2009

Journal of Hazardous Materials

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“…concentration for SBP-catalyzed treatment is considered to depend on the kind of phenol compounds and their initial concentration, the solubility of phenoxy oligomers generated, and the process parameters such as pH and temperature. In other articles on the peroxidase-catalyzed treatment of phenol compounds, the ratios of the initial concentrations of H 2 O 2 to phenol compounds calculated from the experimental data described ranged from 1.0 to 2.0 [32,44,45]. This supports our concept that the optimum H 2 O 2 concentration should be determined for each phenol compound.…”

Section: Effect Of H 2 O 2 Concentrationsupporting

confidence: 59%

“…The temperature used for SBP-catalyzed treatment of phenol compounds ranged from 25 to 358C [38,[45][46][47]. Of them, A. Bódalo et al examined the effect of the reaction temperature on SBP-catalyzed treatment of phenol and determined to be the optimum temperature of 358C [46].…”

Section: Effect Of Ph Value and Temperaturementioning

confidence: 99%

Soybean peroxidase‐catalyzed treatment and removal of BPA and bisphenol derivatives from aqueous solutions

Watanabe¹,

Kashiwada²,

Matsuda³

et al. 2011

Env Prog and Sustain Energy

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The systematic studies were carried out to determine the optimum process parameters, such as the hydrogen peroxide (H 2 O 2 ) concentration, concentration and molar mass of poly(ethylene glycol) (PEG) as an additive, pH value, temperature, and enzyme dose for treatment of bisphenol A (BPA) with soybean peroxidase (SBP). The SBP-catalyzed treatment of BPA was effectively enhanced by adding PEG in the presence of H 2 O 2 . BPA was completely treated by SBP of 0.50 U/cm 3 and water-insoluble oligomers were generated. The optimum conditions for SBP-catalyzed treatment of BPA at 0.3 mM were determined to be 0.3 mM of H 2 O 2 and 0.10 mg/cm 3 of PEG with molar mass of 1.0 3 10 4 g/mol in a pH 7.0 buffer at 308C. A variety of bisphenol derivatives were completely or effectively treated by SBP under the optimum conditions determined for treatment of BPA, although the SBP dose was further increased as necessary for some of them. The aggregation of water-insoluble oligomers generated was enhanced by decreasing the pH values of the solutions to 4.0 with HCl after the enzymatic treatment, and BPA and bisphenol derivatives were removed from aqueous solutions by filtering off the oligomer precipitates.

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Synthesis of peroxidase‐encapsulated sodium cellulose sulphate/poly‐dimethyl‐diallyl‐ammonium chloride biopolymer via polyelectrolyte complexation for enhanced removal of phenol

Chiong

Lau

Zeng

et al. 2019

Asia-Pacific J Chem Eng

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Peroxidases have attracted significant interests in enzymatic wastewater treatment strategies. In this work, jicama peroxidase (JP) was extracted from jicama skin peels and used for the degradation of phenol under free and immobilized conditions. The crude enzyme extract demonstrated enzymatic activity of 1.6 ± 0.1 U mL −1 . Sodium cellulose sulphate/poly-dimethyl-diallyl-ammonium chloride (NaCS-PDMDAAC) spherical capsules were synthesized and immobilized with crude JP to generate JP beaded capsules with an average diameter of 5.05 mm ± 0.16 mm. Phenol biodegradation analysis showed that the free and immobilized JP capsules demonstrated optimum working pH values of 7 and 6, respectively, and both systems maintained JP catalytic functionalities over a broad range of H 2 O 2 concentration before H 2 O 2 inhibition.The optimal temperature range for phenol removal was from 25°C to 40°C for both free and immobilized JP with lower removal efficiency above 45°C due to thermal denaturation. Due to diffusive mass transfer limitation, immobilized JP capsules required a longer reaction time of 15 hr for optimal phenol removal efficiency of >95%, whereas free JP achieved the same efficiency in 13 hr. The first order kinetic rate constants for free and immobilized JP capsules were determined to be 1.21 hr −1 and 1.02 hr −1 , respectively. JP capsules maintained reusability up to 4 cycles at the highest removal efficiency of >95% with no regeneration.

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Removal of 4-chlorophenol by soybean peroxidase and hydrogen peroxide in a discontinuous tank reactor

Cited by 21 publications

References 19 publications

Comparison of alternative treatments for 4-chlorophenol removal from aqueous solutions: Use of free and immobilized soybean peroxidase and KrCl excilamp

Comparison of alternative treatments for 4-chlorophenol removal from aqueous solutions: Use of free and immobilized soybean peroxidase and KrCl excilamp

Soybean peroxidase‐catalyzed treatment and removal of BPA and bisphenol derivatives from aqueous solutions

Synthesis of peroxidase‐encapsulated sodium cellulose sulphate/poly‐dimethyl‐diallyl‐ammonium chloride biopolymer via polyelectrolyte complexation for enhanced removal of phenol

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