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Application of Fenton´s Reagent for Acrylic Dyeing Wastewater Decolorization, Organic Matter Reduction and Biodegradability Improvement
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Carmen S. D. Rodrigues
Veröffentlicht/Copyright:
30. November 2016
Abstract
Fenton's reagent oxidation was employed for organic matter and color removal, along with biodegradability improvement, of a synthetic acrylic dyeing wastewater, previously treated by coagulation/flocculation. The initial iron load in the Fenton’s stage varied from the residual soluble iron concentration resulting from the coagulation/ flocculation process (which was 275 mg Fe/L) up to 400 mg/L, by adding increasing amounts of ferrous sulfate. The combination of the two treatments led to overall removals of 99.8, 84.2 and 78.6% for color, dissolved organic carbon (DOC) and chemical oxygen demand (COD), respectively, complying with maximum allowable discharge values. The Fenton process was also directly applied to the effluent. Under the optimum conditions, the color removal (99.5%) was similar to that obtained in the combined process, but DOC and COD removals were lower (66.5 and 65.1%, respectively). An improvement of the wastewater biodegradability was observed in such condition: the specific oxygen uptake rate and BOD:COD ratio increased from < 0.2 to 17.9 mgO2/(gVSS.h)) and from ~0 to 0.40, respectively. The effluent toxicity also decreased, from 97 to 29% (30 min contact time), allowing the subsequent integration of a biological process.
Keywords: Coagulation/flocculation; Fenton; Hydrogen peroxide; Dyeing Textile wastewater; Biodegradability; Toxicity
Received: 2011-8-30
Revised: 2011-11-11
Accepted: 2011-11-15
Published Online: 2016-11-30
Published in Print: 2012-1-1
© 2016 by Walter de Gruyter Berlin/Boston
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Schlagwörter für diesen Artikel
Coagulation/flocculation;
Fenton;
Hydrogen peroxide;
Dyeing Textile wastewater;
Biodegradability;
Toxicity
Artikel in diesem Heft
- Activity of TiO2 Photocatalyst Modified with H2WO4 for Degradation of Organic Compounds in Water
- The Influence of Solution Composition on the Effectiveness of Degradation of Ibuprofen Sodium Salt in a Hybrid Photocatalysis – Membrane Distillation System
- Antifungal Effect of Titanium Dioxide, Indoor Light and the Photocatalytic Process in In Vitro Test on Different Media
- Influence of Contaminants on Arc Properties during Treatment of Polluted Soils in Electric Arc Plasma
- DDT-Contaminated Soil Treatment with Persulfate and Hydrogen Peroxide Utilizing Different Activation Aids and the Chemicals Combination with Biosurfactant
- Landfill Leachate Treatment by Fenton, Photo-Fenton Processes and their Modification
- The Technological Parameters of Hydrochlorination of Glycerol to Dichloropropanols
- Characterization of TiO2 Modified with Bimetallic Ag/Au Nanoparticles Obtained inMicroemulsion System
- Application of Fenton´s Reagent for Acrylic Dyeing Wastewater Decolorization, Organic Matter Reduction and Biodegradability Improvement
- Photocatalytic and Self-cleaning Properties of Titania Coatings Prepared by Inkjet Direct Patterning of a Reverse Micelles Sol-gel Composition
- Decomposition of Microcystis aeruginosa and Microcystin-LR by TiO2 Oxidation Using Artificial UV Light or Natural Sunlight
- Application of Fenton and Solar Photo-Fenton Processes to the Treatment of a Sanitary Landfill Leachate in a Pilot Plant with CPCs
- Raschig Rings Based on Pillared Clays: Efficient Reusable Catalysts for Oxidation of Phenol
- Assessing the Effect of Inorganic Anions on TiO2-Photocatalysis and Ozone Oxidation Treatment Efficiencies
- Heterogeneous Catalytic Supercritical Water Oxidation of Refractory Organic Pollutants in Industrial Wastewaters
- Photodegradation of p-cresol in Aqueous Mn(1%)-Doped ZnO Suspensions
- CFD Modeling of Fixed Photocatalytic Inserts for a Continuous Flow Reactor for Water Disinfection
- Simulation of Simultaneous Removal of SO2 and NO Using Pulsed Discharge
- Congo Red Degradation in Anode and Sunlight/derivative Persulfate Composite Oxidation System
- Photocatalytic Degradation of Acephate on ZnFe2O4-TiO2 Photocatalyst under Visible-Light Irradiation
- Decolorization of Methyl Orange Solution with Potassium Bromate under UV Irradiation
- Utilization of Ozone Based Techniques for Industrial Effluents Depuration and Reuse
- Hydrogen Peroxide Generation by DC and Pulsed Underwater Discharge in Air Bubbles
- Silver and Phosphate Functionalized Reactive TiO2/Polymer Composite Films for Destructions of Resistent Bacteria Using Visible Light
- Treatment of Composted Soils contaminated with Petroleum Hydrocarbons using Chemical Oxidation followed by Enhanced Aerobic Bioremediation
