Kinetics of phenol degradation using

1998 ◽  
Vol 18 (5) ◽  
pp. 373 ◽  
Author(s):  
K. Bandyopadhyay ◽  
D. Das ◽  
B. R. Maiti
Keyword(s):  
Phenol Degradation ◽  
Kinetics Of

Biodegradation Kinetics of Phenols in an Aerobic Biofilm at Low Concentrations

1991 ◽  
Vol 23 (7-9) ◽  
pp. 1375-1384 ◽  
Author(s):  
Erik Arvin ◽  
Bjørn K. Jensen ◽  
Anders Torp Gundersen
Keyword(s):  
Phenol Degradation ◽  
Carbon Sources ◽  
Order Reaction ◽  
Zero Order ◽  
Biofilm Reactor ◽  
Aerobic Biodegradation ◽  
Maximum Capacity ◽  
Low Concentrations ◽  
Zero Order Reaction ◽  
Kinetics Of

Aerobic biodegradation of the phenols: phenol, 2-methylphenol, 4-methylphenol, 2,4-dimethylphenol, 3,5-dimethylphenol and 2,4,6-trimethylphenol was studied in a biofilm reactor to establish kinetic constants under conditions where the phenols were the sole carbon sources. Phenol concentrations were very low, in the µg/l concentration range. 2,4,6-trimethylphenol was not degraded. The degradation of the other phenols was 1'st order at concentrations in the bulk phase below 20-50 µg/l. Zero order reaction seemed to govern the reaction above 200 µg/l. The l'st order rate constants are 3-30 times higher than the constants calculated for easily degradable organic compounds degraded at 100-1000 times higher concentrations (mg/l range). However, the maximum phenol utilization rates and the Monod constants were much lower compared with constants obtained for the microorganisms grown in the mg/l concentration range. The Monod constant was about 100 times lower. The removal of “total biodegradable phenol” (TB-phenol) was very similar to the removal of a specific compound. The degradation of TB-phenol was l'st order at concentrations below 200 µg/l. When the total biodegradable phenol degradation is near its maximum capacity (o'order reaction) there was a preferential degradation of the most easily degradable phenols, phenol and 2-methylphenol, leading to an apparent inhibition of the degradation of the more slowly degradable phenols, in particular 2,4-dimethylphenol and 3,5-dimethylphenol.

scholarly journals Simultaneous Galvanic Generation of Fe2+ Catalyst and Spontaneous Energy Release in the Galvano-Fenton Technique: A Numerical Investigation of Phenol’s Oxidation and Energy Production and Saving

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 943
Author(s):  
Kaouther Kerboua ◽  
Oualid Hamdaoui ◽  
Naoufel Haddour ◽  
Abdulaziz Alghyamah
Keyword(s):  
Energy Release ◽  
Energy Production ◽  
Electrochemical Techniques ◽  
Phenol Degradation ◽  
Fenton Process ◽  
Ferric Ions ◽  
Advanced Technique ◽  
Simultaneous Oxidation ◽  
Kinetics Of ◽  
Basic Configuration

The present paper investigates the potential of the Galvano-Fenton process as an advanced technique in terms of the simultaneous oxidation of a model pollutant, phenol, and the energy release and saving as compared to conventional electrochemical techniques, namely, Fenton, Fenton-like, and Electro-Fenton. A numerical model describing the electrochemical, electrolytic, and phenol’s mineralization reactions is presented. Simulations are conducted to predict the kinetics of ferrous and ferric ions, radicals’ formation, and phenol degradation along with released power. Parametric analysis and comparisons are also performed between the basic configuration of the Galvano-Fenton process and its upgraded version integrating a pre-immersion stage of the electrodes in the electrolyte equivalent to 25% of the total experiment’s duration. The ratio of the initial concentration of H2O2 to the concentration of the released/added Fe2+ catalyst is varied from 10 to 30. The effect of phenol concentration is inspected over the range of 0.188 to 10 mg/L as well. Compared to conventional Fenton-based techniques, the Galvano-Fenton process demonstrated a higher performance by reaching 1.34% of degradation efficiency per released J. This is associated with the generation of hydroxyl radicals of 0.047 nM/released J with initial concentrations of hydrogen peroxide and phenol of 0.187 mM and 2 µM, respectively. Moreover, the integration of the pre-immersion stage allowed the overcoming the barrier of the null degradation rate at the initial instant.

scholarly journals Studying the Phenol Degradation in Synthetic Wastewater by Catalytic Wet Air Oxidation Process in Batch Reactor

2018 ◽  
Vol 7 (4.20) ◽  
pp. 629
Author(s):  
Ghayda Yaseen AL Kindi ◽  
Faris Hammoodi AL Ani
Keyword(s):  
Batch Reactor ◽  
Phenol Degradation ◽  
Pillared Clay ◽  
Synthetic Wastewater ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Operation Condition ◽  
Optimum Proportion ◽  
Catalytic Kinetics ◽  
Kinetics Of

The current paper studies the viability of using a Batch reactor, by five types of Al-Fe pillared clay that prepared from five regions in Iraq for phenol degradation in synthetic wastewater. The operation condition study through variables in (pH, pressure, temperature, pillared load, phenol load). The findings have illustrated that phenol degradation could be increase via incrementing temperature, pressure, pillared load and degrease in phenol load. Phenol good degradation proportion which was 97 %, has been achieved at optimum proportion (pH= 3.9, temperature = 150 °C, pressure = 3.5 MPa, in addition to phenol concentration = 500 mg/l). The two models power-law and Langmuir−Hinshelwood have been used   to study the catalytic kinetics of the phenol degradation. From results shown the activation energy for every response equivalent to (37114.014 j/mol) for Anbar (37795, 48783.9, 36628, 40785 j/mol) for Erbil, Mosul, Baghdad and Basra respectively. It was proved that the reaction in this study is under kinetics control.   

“In situ” investigations to define the degradation of phenols in groundwater

2007 ◽  
Vol 7 (3) ◽  
pp. 9-16
Author(s):  
M. Dimkić ◽  
M. Pušić ◽  
M. Jordanovski
Keyword(s):  
Analytical Methods ◽  
Phenol Degradation ◽  
Aerobic Conditions ◽  
Aquifer Material ◽  
Short Overview ◽  
Sandy Aquifers ◽  
Kinetics Of

Phenols are especially suitable for defining the mechanism of their degradation in groundwater. Phenols, for the most part, do not sorb on clastic aquifer material. This allows for a comparison of their relative concentrations in groundwater to the concentrations of a tracer, and leads to conclusions which can be drawn about the kinetics of phenol degradation. We have had an opportunity to monitor, in detail, the degradation of phenols at three locations. All three cases involved gravelly and sandy aquifers and aerobic conditions. A summary of the analytical methods applied, and basic results obtained is presented. This paper represents a short overview of the flow and results of the monitoring and five tests which were conducted at the three locations over several years. We believe that the results are representative of the behavior of phenols in aerobic intergranular aquifers.

Kinetics of phenol degradation by activated sludge: Value of measurements in a batch reactor

1979 ◽  
Vol 13 (12) ◽  
pp. 1305-1309 ◽  
Author(s):  
Paolo Beltrame ◽  
Pier Luigi Beltrame ◽  
Paolo Carniti ◽  
Demetrio Pitea
Keyword(s):  
Activated Sludge ◽  
Batch Reactor ◽  
Phenol Degradation ◽  
Kinetics Of

scholarly journals Recovery of mangrove sediment contaminated with fuel oil by endogenous microbial consortium

2020 ◽  
Vol 42 ◽  
pp. e6
Author(s):  
Amanda Ferreira Santos Silva ◽  
Thomas Wendell Fernandes dos Santos ◽  
Norma Buarque de Gusmão ◽  
Persio Alexandre da Silva ◽  
Thais De Melo Castelo Branco ◽  
...  
Keyword(s):  
Degradation Rate ◽  
Microbial Consortium ◽  
Degradation Kinetics ◽  
Phenol Degradation ◽  
Fractional Factorial ◽  
Fuel Oil ◽  
Lubricating Oil ◽  
Mangrove Sediment ◽  
Process Conditions ◽  
Kinetics Of

This work aimed to select a microbial consortium enriched with isolated microorganisms of mangrove sediment as to its capacity to recover sediment contaminated by lubricating oil. The promising microorganisms were selected using the colorimetric dichlorophenol indophenol technique (DCPIP) using lubricating oil as the carbon source, to evaluate the emulsifying and enzymatic activity of the microorganisms. The antagonism test was also used for further evaluation of the consortia. The fractional factorial experimental design methodology (2n) was used to establish the process conditions for the subsequent accomplishment of the degradation kinetics of the lubricating oil by the selected microorganisms and consortium. Eight bacteria and three fungi were evaluated, of which five were selected with a 36 h turn of the DCPIP indicator. Eleven microorganisms produce emulsifying substances and five produce enzymes. The results showed that the best consortium was B5F2F4, with a degradation rate of 95% of the phenol at 70 rpm in 250 μL of the oil. The kinetics of oil degradation showed a phenol degradation rate of 65% after 24 days of treatment. The microorganisms are suitable for the degradation of phenol, the main constituent of the oil, and can be used as a recovery model for environments contaminated with hydrocarbons.

Kinetics of phenol degradation using Pseudomonas putida MTCC 1194

1998 ◽  
Vol 18 (5) ◽  
pp. 373-377 ◽  
Author(s):  
K. Bandyopadhyay ◽  
D. Das ◽  
B. R. Maiti
Keyword(s):  
Pseudomonas Putida ◽  
Phenol Degradation ◽  
Kinetics Of

scholarly journals Studying the Phenol Degradation in Synthetic Wastewater by Catalytic Wet Air Oxidation Process in Batch Reactor

2018 ◽  
Vol 7 (4.20) ◽  
pp. 594
Author(s):  
Ghayda Yaseen AL Kindi ◽  
Faris Hammoodi AL Ani ◽  
. .
Keyword(s):  
Batch Reactor ◽  
Phenol Degradation ◽  
Pillared Clay ◽  
Synthetic Wastewater ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Operation Condition ◽  
Optimum Proportion ◽  
Catalytic Kinetics ◽  
Kinetics Of

The current paper studies the viability of using a Batch reactor, by five types of Al-Fe pillared clay that prepared from five regions in Iraq for phenol degradation in synthetic wastewater. The operation condition study through variables in (pH, pressure, temperature, pillared load, phenol load). The findings have illustrated that phenol degradation could be increase via incrementing temperature, pressure, pillared load and degrease in phenol load. Phenol good degradation proportion which was 97 %, has been achieved at optimum proportion (pH= 3.9, temperature = 150 °C, pressure = 3.5 MPa, in addition to phenol concentration = 500 mg/l). The two models power-law and Langmuir−Hinshelwood have been used   to study the catalytic kinetics of the phenol degradation. From results shown the activation energy for every response equivalent to (37114.014 j/mol) for Anbar (37795, 48783.9, 36628, 40785 j/mol) for Erbil, Mosul, Baghdad and Basra respectively. It was proved that the reaction in this study is under kinetics control.  

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