Enhanced treatment of coking wastewater containing phenol, pyridine, and quinoline by integration of an E-Fenton process into biological treatment

Combined Chemical-Biological Treatment of Effluents from Soil Remediation Processes by Surfactants Solutions Flushing In recent years combined chemical-biological wastewater treatment processes have received increasing interest. In the present study wastewater from soil remediation processes were treated by means of 1-step processes like Fenton, aerobic degradation and 2-steps combined method. The effluents resulting from soil remediation processes consist of high surfactant concentration solutions, mobilized oils and oil-in-water (o/w) emulsions. The effectiveness of wastewater treatment was evaluated by COD reduction and surfactant removal. The application of Fenton process alone showed around 80% of COD and surfactant removal, and in case of aerobic process only 60% of COD and 50% of surfactant removal was accomplished. However, the maximum COD reduction and surfactant removal from wastewater samples, above 90%, was obtained in aerobic degradation with Fenton process as pretreatment. Thus, the Fenton process could be effectively applied as a pretreatment step to improve the reduction of both COD and surfactant from wastewater resulting from soil remediation.

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Adsorptive treatment of coking wastewater using raw coal fly ash: Adsorption kinetic, thermodynamics and regeneration by Fenton process

Chemosphere ◽

10.1016/j.chemosphere.2018.07.073 ◽

2018 ◽

Vol 210 ◽

pp. 624-632 ◽

Cited By ~ 19

Author(s):

Nannan Wang ◽

Qiang Zhao ◽

Han Xu ◽

Wanyu Niu ◽

Liang Ma ◽

...

Keyword(s):

Fly Ash ◽

Coal Fly Ash ◽

Adsorption Kinetic ◽

Coking Wastewater ◽

Fenton Process ◽

Adsorptive Treatment

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Degradation of Matured Landfill Leachate by Electro Fenton Treatment and Optimization by Response Surface Methodology

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.8.16842 ◽

2018 ◽

Vol 7 (3.8) ◽

pp. 101

Author(s):

Minimol Pieus T ◽

Soloman P.A

Keyword(s):

Landfill Leachate ◽

Biological Treatment ◽

Solid Waste Management ◽

Electrochemical Treatment ◽

Ammonia Nitrogen ◽

Fenton Process ◽

The Earth ◽

Novel Approach ◽

The World ◽

Optimum Working

The landfill is the most widely utilized approach for solid waste management over the world. The fluid side-effect of the procedure, leachate, is a genuine danger to the earth. The ordinary biological treatment of matured landfill leachate is restricted by the presence of toxic contaminants and recalcitrant organics. A novel approach for management of landfill leachate by Electro Fenton process is researched here for the technical feasibility. The experimental outcome demonstrated that there was extensive reduction in COD-78.2%, Ammonia nitrogen-42.0%, Chloride-63.5%, Sulfate-60.0%, Sulfide-57.3%, and Phosphate-62.4% at the optimum working state of pH-2.85, Current density-140.5 A/m2, H2O2 dosage- 53% of theoretical value, Reaction time-44min. The biodegradability index was enhanced from 0.21 to 0.43 because of the treatment. The examination not just uncovers the likelihood of degradation of contaminants by giving a mild electrochemical treatment additionally extends the possibility of utilizing the approach as a compelling pretreatment for its biological treatment.

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Preliminary treatment of phenanthrene in coking wastewater by a combined potassium ferrate and Fenton process

International Journal of Environmental Science and Technology ◽

10.1007/s13762-018-2037-8 ◽

2018 ◽

Vol 16 (8) ◽

pp. 4483-4492 ◽

Cited By ~ 2

Author(s):

Y. N. Li ◽

Z. H. Duan ◽

Y. F. Wang ◽

Z. J. Yuan ◽

G. Y. Wang

Keyword(s):

Preliminary Treatment ◽

Coking Wastewater ◽

Fenton Process ◽

Potassium Ferrate

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Degradation of an organophosphorus insecticide in aqueous medium by Electro-Fenton process

Acta periodica technologica ◽

10.2298/apt2152063a ◽

2021 ◽

pp. 63-72

Author(s):

Mirvet Assassi ◽

Farid Madjene ◽

Abdeltif Amrane

Keyword(s):

Biological Treatment ◽

Supporting Electrolyte ◽

Operating Conditions ◽

Organophosphorus Insecticide ◽

Current Intensity ◽

Fenton Process ◽

Factors Affecting ◽

Incomplete Removal ◽

Temperature Solution ◽

Major Factors

This work proposes the remediation of toxic and/or refractory pollutants, such as the organophosphorus insecticide (Phosmet) which cannot be completely degraded by conventional methods like biological treatment, adsorption, flocculation, electro-flocculation, reverse osmosis, ultrafiltration, coagulation. However, these techniques have some disadvantages such as incomplete removal, therefore, the Electro-Fenton process was used. The major factors affecting the removal of Phosmet, namely the current intensity, catalyst concentration (Fe3+), temperature solution, nature of the electrolytes and oxygenation duration of the solution were studied in this work. The optimal operating conditions appeared to be: current intensity 200 mA, 0.5 mmol L-1 of Fe3+, T= 20?C, pH =3 using Na2SO4 (50 mmol L-1) as supporting electrolyte and an oxygen supply throughout all the experiments (120 min). Under these optimal conditions, the removal efficiency of the phosmet was 88%.

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