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Decolorization, Degradation and Toxicity of Dye Solutions Containing Orange Cassafix® CA-2R after UV/H2O2 Oxidation under Laminar Flow Conditions
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Lindomar G. De Sousa
Published/Copyright:
November 30, 2016
Abstract
Dye solutions containing Orange Cassafix® CA-2R were treated using the UV/H2O2 advanced oxidation process under laminar flow conditions characterized by Reynolds numbers in the range of 322-295 using an annular photochemical reactor. The initial dye concentration [dye]0 and the initial hydrogen peroxide concentration [H2O2]0 were shown to affect the percentage of decolorization (P.D.) as a function of the irradiation time (t). A maximum P.D. of 90% was achieved at t > 120 min, [H2O2]0 = 800 ppm and [dye]0 = 300 ppm. The total organic carbon (TOC) depends on [H2O2]0 and [dye]0, while a maximum TOC reduction of 45% was achieved when t > 100 min, [H2O2]0 = 800 ppm and [dye]0 = 200 ppm. The toxicity of the treated samples was changed from 38 to 79%, depending on the [H2O2]0/[dye]0 ratio. A minimum electric energy consumption of 0.383 kW h m-3 order-1 was obtained at the [dye]0/[H2O2]0 ratio of 0.25.
Received: 2013-7-28
Revised: 2013-11-14
Accepted: 2013-11-24
Published Online: 2016-11-30
Published in Print: 2014-1-1
© 2016 by Walter de Gruyter Berlin/Boston
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Keywords for this article
laminar flow;
percentage of decolorization;
mineralization degree;
toxicity reduction
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- Synthesis of Platinum Particles Supported on Microporous Carbons for an Electrocatalysis Study of Ammonia and Cytotoxicity
- Glycerol-Assisted Hydrolysis Synthesis of BiOCl and Excellent Visible- Light-Driven Photocatalytic Performance
- Preparation of Mesoporous BiVO4 for Efficient Photocatalytic Degradation of RhB Under Illuminated Visible Light
- Bi-doped TiO2 with Remarkably Enhanced Photocatalytic Activity Under Simulated Sunlight Induced by Increased Hydrophilicity and Light Absorption Ability
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