Journal ArticleDOI
Physicochemical Modifications and Decolorization of Textile Wastewater by Ozonation: Performance Evaluation of a Batch System
Eduardo Sant’Ana Petraconi Prado,F.S. Miranda,Luciana Gomes de Araujo,G. L. Fernandes,A. L. J. Pereira,Manuel C. Gomes,A. S. da Silva Sobrinho,Maurício Ribeiro Baldan,Gilberto Petraconi +8 more
- Vol. 45, pp 276-290
TLDR
In this article , an experimental study on the decolorization efficiency and degradation of organic compounds from textile wastewater by the ozonation process in a batch system was performed in a 1 L glass reactor with a magnetic stirrer and a bubble diffuser at the bottom to feed the ozone.Abstract:
ABSTRACT This is an experimental study on the decolorization efficiency and the degradation of organic compounds from textile wastewater by the ozonation process in a batch system. The effects of different sample volumes of textile wastewater over time were investigated. The experiments were performed in a 1 L glass reactor with a magnetic stirrer and a bubble diffuser at the bottom to feed the ozone. The applied cumulative ozone dosage varied at 120 gO3 L−1, 60 gO3 L−1, and 30 gO3 L−1, and the total interaction time for each test was 1 h. To investigate the physicochemical properties of the textile wastewater (solid and liquid phases) before and after the treatment, multiple analytical characterization methods were used: Thermal Gravimetric Analysis, Scanning Electron Microscopy coupled with Energy-Dispersive X-ray Spectroscopy, X-ray diffraction, Fourier Transform Infrared spectroscopy, and Spectrophotometer. The most perceptive change was observed in the color of the liquid medium, which turned from black to transparent, and a visual color number indicator known as DurchsichtFarbZahl (DFZ) was used for the evaluation of this process. Absorbance values decreased about 3.5 times after 5 min of treatment with a 0.15 L sample volume, and these values differed for tests with larger sample volumes. FTIR spectroscopy demonstrated that the bands’ intensities associated with the C − H, C − N, and C − O decrease during treatment. On the other hand, it was possible to conclude that combining treatment methods to improve the degradation of persistent compounds after the ozonation process is necessary. Finally, the ozonation of the textile wastewater proved to be effective at removing color due to its high reaction capacity. Graphical Abstractread more
Citations
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Journal ArticleDOI
Photocatalytic degradation of azo dyes in textile wastewater by Polyaniline composite catalyst-a review
TL;DR: In this paper , a review of the treatment process for azo dyes, fabrication and performance evaluation of improved composite catalyst of PANI as an alternative to the conventional catalyst in wastewater is presented.
References
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Journal ArticleDOI
Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods. An updated review
TL;DR: In this paper, a review of the electrochemical methods used at lab and pilot plant scale to decontaminate synthetic and real effluents containing dyes, considering the period from 2009 to 2013, as an update of our previous review up to 2008.
Journal ArticleDOI
A review on chemical coagulation/flocculation technologies for removal of colour from textile wastewaters.
TL;DR: Some novel pre-hydrolysed coagulants such as Polyaluminium chloride (PACl), Polyal aluminium ferric chloride (PAFCl), Polyferrous sulphate (PFS) and Polyferic chloride (PFCl) have been found to be more effective and suggested for decolourisation of the textile wastewater.
Journal ArticleDOI
A critical review on textile wastewater treatments: Possible approaches.
Chandrakant R. Holkar,Ananda J. Jadhav,Dipak V. Pinjari,Naresh M. Mahamuni,Aniruddha B. Pandit +4 more
TL;DR: Different treatment methods to treat the textile wastewater have been presented along with cost per unit volume of treated water, and the possible remedial measures to treat different types of effluent generated from each textile operation are recommended.
Journal ArticleDOI
Advanced Oxidation Processes (AOPs) in Wastewater Treatment
Yang Deng,Renzun Zhao +1 more
TL;DR: In this paper, the fundamental mechanisms of radical generation in different AOPs and select landfill leachate and biologically treated municipal wastewater as model wastewaters to discuss wastewater treatment with different Advanced Oxidation processes.
Journal ArticleDOI
Textile dye wastewater characteristics and constituents of synthetic effluents : a critical review
TL;DR: In this article, the authors present a critical review of the currently available literature regarding typical and real characteristics of the textile effluents, and also constituents including chemicals used for preparing simulated textile wastewater containing dye, as well as the treatments applied for treating the prepared wastewater.