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Article

In situ Decolorization Monitoring of Textile Dyes for an Optimized UV-LED/TiO2 Reactor

1
Motion Control and Industrial Applications (MCIA) Research Center, Department of Electronic Engineering, Universitat Politècnica de Catalunya, Rambla Sant Nebridi, 22, 08222 Terrassa, Spain
2
Nonlinear Dynamics, Nonlinear Optics and Lasers (DONLL), Department of Physics, Universitat Politècnica de Catalunya, Colom 11, 08222 Terrassa, Spain
*
Author to whom correspondence should be addressed.
Catalysts 2019, 9(8), 669; https://doi.org/10.3390/catal9080669
Received: 5 July 2019 / Revised: 31 July 2019 / Accepted: 1 August 2019 / Published: 6 August 2019
(This article belongs to the Special Issue Environmental Applications of Photocatalytic Processes)
Heterogeneous photocatalysis, using photocatalysts in suspension to eliminate diverse contaminants, including textile wastewater, has several advantages. Nevertheless, current absorbance and decolorization measurements imply sample acquisition by extraction at a fixed rate with consequent photocatalyst removal. This study presents online monitoring for the decolorization of six azo dyes, Orange PX-2R (OP2), Remazol Black B133 (RB), Procion Crimson H-EXL (PC), Procion Navy H-EXL (PN), Procion Blue H-EXL (PB), and Procion Yellow H-EXL (PY), analyzing the spectrum measured in situ by using the light scattering provided by the photocatalyst in suspension. The results obtained have corroborated the feasibility of obtaining absorbance and decolorization measurements, avoiding disturbances in the process due to a decrease in the volume in the reactor. View Full-Text
Keywords: optical monitoring; scattering; azo dyes; color removal; heterogeneous photocatalysis optical monitoring; scattering; azo dyes; color removal; heterogeneous photocatalysis
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MDPI and ACS Style

Tapia-Tlatelpa, T.; Trull, J.; Romeral, L. In situ Decolorization Monitoring of Textile Dyes for an Optimized UV-LED/TiO2 Reactor. Catalysts 2019, 9, 669. https://doi.org/10.3390/catal9080669

AMA Style

Tapia-Tlatelpa T, Trull J, Romeral L. In situ Decolorization Monitoring of Textile Dyes for an Optimized UV-LED/TiO2 Reactor. Catalysts. 2019; 9(8):669. https://doi.org/10.3390/catal9080669

Chicago/Turabian Style

Tapia-Tlatelpa, Tecilli, Jose Trull, and Luis Romeral. 2019. "In situ Decolorization Monitoring of Textile Dyes for an Optimized UV-LED/TiO2 Reactor" Catalysts 9, no. 8: 669. https://doi.org/10.3390/catal9080669

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