Integration of Photocatalysis with Ultrafiltration or Membrane Distillation for Removal of Azo Dye Direct Green 99 from Water
-
Sylwia Mozia
and
Antoni W. Morawski
Abstract
An application of hybrid processes photocatalysis - ultrafiltration (UF) and photocatalysis - direct contact membrane distillation (DCMD, MD) for removal of azo-dye Direct Green 99 from water is presented. Titanium dioxide Aeroxide® P25 (Degussa, Germany) was used as a photocatalyst. It was found that both membrane processes were effective in separation of TiO2 particles from the reaction solution. However, during UF a significant flux decline (from 5.2 m3/m2d to about 3.7 m3/m2d at 0.5 gTiO2/dm3) due to the membrane fouling caused by TiO2 particles was observed. Moreover, the products and by-products of photodegradation of model azo-dye passed completely through the UF membrane. The results obtained during hybrid photocatalysis - MD processes were much more promising. The permeate flux remained constant (0.35 m3/m2d) during the experiments and was equal to the flux measured for distilled water applied as a feed. After 5 h of the processes performance the model dye was removed completely, whereas TOC concentration in permeate did not exceed the value of 1.5 gC/dm3.
© 2016 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Synthesis of TiO2/Au Nanocomposites via Sol-Gel Process for Photooxidation of Methanol
- Design of CeyCoxTi (1-x) O3+δ Perovskite for Photocatalysis: A Statistical Study
- Electro-Fenton Treatment of TNT in Aqueous Media in Presence of Cyclodextrin. Application to Ex-situ Treatment of Contaminated Soil
- A Quantum Mechanical Approach to TiO2 Photocatalysis
- Removal of Color Compounds from Recycled Water Using Combined Activated Carbon Adsorption and AOP Decomposition
- Preparation of Co-doped TiO2 for Photocatalytic Degradation of NOx in Air under Visible Light
- Depletion of Several Antibiotics Used in Industrial Process Using Immobilized TiO2
- Oxidative Pretreatment of Fresh and Mature Landfill Leachate
- Titanium Dioxide onto Polyethylene for Water Decontamination
- Application of Photocatalysis for the Removal of Natural Organic Matter in Simulated Surface and Ground Waters
- Photocatalytic Treatment of A Dye Polluted Industrial Effluent With A Solar Pilot-Scale CPC Reactor
- Evaluation of the Algaecide Activity of Titanium Dioxide on Autoclaved Aerated Concrete
- Degradation of 4-n-nonylphenol in Water by 20 kHz Ultrasound
- Integration of Photocatalysis with Ultrafiltration or Membrane Distillation for Removal of Azo Dye Direct Green 99 from Water
- Binder Effect on Photocatalytic Performance of TiO2 Solution Coating Layers
- Rhodamine B Discolouration on TiO2 in the Cement Environment: A Look at Fundamental Aspects of the Self-cleaning Effect in Concretes
- Effects of Inorganic Anions and Humic Acid on the Photocatalytic and Ozone Oxidation of Oxytetracycline in Aqueous Solution
