H2O2/UV-C Treatment of the Economically Important Naphthalene Sulfonate J-Acid: Process Optimization, Kinetic Evaluation and Activated Sludge Inhibition
-
Idil Arslan-Alaton
,
Tuğba Olmez-Hanci
Abstract
J-acid (2-amino-5-naphthol-7-sulfonic acid) is an economically important naphthalene sulfonate having a highly polar, aromatic structure that renders it a difficult-to-oxidize, coagulate or adsorb pollutant. In the present study, the treatability of aqueous J-acid employing H2O2/UV-C oxidation and the effect of H2O2 (0-150 mM) concentrations on J-acid and organic carbon (COD, TOC) abatement rates was investigated and modeled by employing competitive inhibition kinetics. Inhibition of oxygen uptake rate was evaluated as a tool for assessing the acute toxicity of J-acid’s photochemical degradation intermediates using heterotrophic biomass. Our results indicated that J-acid was difficult-to-oxidize via H2O2/UV-C treatment and appreciably high H2O2 concentrations (> 60 mM) and UV-C doses (≥ 80 min; corresponding to 28 kWh/m3) were required to achieve significant (> 50%) removals in terms of the environmental sum parameters parameters COD and TOC. The calculated abatement rates by the use of kinetic model satisfactorily fitted the experimental data in terms of J-acid and COD. A positive correlation existed between the rate of activated sludge inhibition and the amount of photochemical degradation intermediates.
© 2016 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Achieving Stable Biological Oxidation of Erratic Waste Gas Streams by Utilizing Cyclic Adsorption/Desorption Beds
- Production of Titanium Dioxide Nanoparticles and Nanostructures from Dye Wastewater Sludge - Characterisation and Evaluation of Photocatalytic activity
- The Application of Photocatalytic Oxidation in Removing Pentachlorophenol from Contaminated Water
- H2O2/UV-C Treatment of the Economically Important Naphthalene Sulfonate J-Acid: Process Optimization, Kinetic Evaluation and Activated Sludge Inhibition
- Nonthermal Plasma Destruction of Trifluoromethane Using a Dielectric- Packed Bed Reactor
- Investigation of Electric Discharge Sound in Atmospheric Pressure Plasma
- Chlorophenols Contaminated Soil Remediation by Peroxidation
- Synthesis, Characterization and Visible-Light Photocatalytic Activity of La2O3/SnO2 Nanocomposite
- Electrical Discharge Characteristics Using a Bubble in Water and Their Applications to the Water Treatment
- Development of Higher Yield Ozonizer Based on Nano-Seconds Pulsed Discharge
- Ozone Mass Transfer in a Recirculating Loop Semibatch Reactor Operated at High Pressure
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- Comparison of Photocatalytic Activities of Commercial Titanium Dioxide Powders Immobilised on Glass Substrates
- Coupling of Adsorption on Zeolite and V-UV Irradiation for the Treatment of VOC Containing Air Streams: Effect of TiO2 on the VOC Degradation Efficiency
- Anaerobic Photocatalytic Oxidation of Carbohydrates in Aqueous Pt/TiO2 Suspensions with Simultaneous Production of Hydrogen
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