Please use this identifier to cite or link to this item:
Author(s): Vítor J. P. Vilar
Petrick A. Soares
Tânia F. C. V. Silva
Aparecido N. Módenes
Fernando R. Espinoza-Quiñones
Rosângela Bergamasco
Rui A. R. Boaventura
Diego R. Manenti
Title: Performance Evaluation of Different Solar Advanced Oxidation Processes Applied to the Treatment of a Real Textile Dyeing Wastewater
Issue Date: 2015-01-16
Abstract: The performance of different solar-driven advanced oxidation processes (AOPs), such as TiO2/UV, TiO2/H2O2/UV, and Fe2+/H2O2/UV-visible in the treatment of a real textile effluent using a pilot plant with compound parabolic collectors (CPCs), was investigated. The influence of the main photo-Fenton reaction variables such as iron concentration (20-100 mg Fe2+ L-1), pH (2.4-4.5), temperature (10-50 degrees C), and irradiance (22-68 W-UV m(-2)) was evaluated in a lab-scale prototype using artificial solar radiation. The real textile wastewater presented a beige color, with a maximum absorbance peak at 641 nm, alkaline pH (8.1), moderate organic content (dissolved organic carbon (DOC)=129 mg C L-1 and chemical oxygen demand (COD) = 496 mg O-2 L-1), and high conductivity mainly associated to the high concentration of chloride (1.1 g Cl- L-1), sulfate (0.4 g SO42 -L-1), and sodium (1.2 g Na+L-1) ions. Although all the processes tested contributed to complete decolorization and effective mineralization, the most efficient process was the solar photo-Fenton with an optimum catalyst concentration of 60 mg Fe2+ L-1, leading to 70% mineralization (DOCfinal = 41 mg C L-1; CODfinal < 150 mg O-2 L-1) at pH 3.6, requiring a UV energy dose of 3.5 kJ(UV)L(-1) (t(30 W) = 22.4 min; <(T)over bar> = 30 degrees C (U) over bar (G,n) = 44 W m(-2)) consuming 18.5 mM of H2O2.
Subject: Tecnologia ambiental, Engenharia do ambiente
Environmental technology, Environmental engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia do ambiente
Engineering and technology::Environmental engineering
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/PEst-C/EQB/LA0020/2013/PROJECTO ESTRATÉGICO - LA 20 - 2013-2014/LA 20
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
  Restricted Access
4.61 MBAdobe PDF    Request a copy from the Author(s)

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.