Textile Wastewater Treatment by Homogeneous Oxidation With Hydrogen Peroxide

Abstract

The textile wastewaters have a diverse composition depending both on the used raw materials and applied manufacturing technologies. These wastewaters may contain various pollutants such as organic compounds (e.g. residual dyes), suspended solids, metal ions etc. Most of dyes are synthetic compounds with aromatic molecular structures and non-biodegradable. The oxidative destruction via homogenous oxidation processes with hydrogen peroxide (simple chemical oxidation with H 2 O 2 or advanced oxidation processes (AOPs) as Fenton oxidation, ozonation, photo-oxidation and photo-Fenton oxidation etc.) are attractive alternatives to conventional treatments, easy to be applied and not so expensive. The use of H 2 O 2 in AOPs has the advantage that the decomposition products of organic pollutants are common harmless compounds. Moreover, H 2 O 2 decomposes itself in water and oxygen. This paper is a review of authors' researches regarding homogenous oxidation with hydrogen peroxide applied for different types of textile dyes in order to perform high textile dye removals considering some relevant factors: pH, agitation regime, temperature, H 2 O 2 concentration, textile dye concentration, oxidation time, ferrous or metallic ions concentration, etc.

Desorption and Re-Adsorption of Procion Red MX-5B Dye on Alumina-Activated Carbon Composite

“…Procion red MX-5B dye has a formula of C19H10Cl2N6Na2O7S2 with molecular weight of 615.33400 g/mol [2]. Several methods have been studied to reduce synthetic dye contained in wastewater such as photocatalytic, chemical oxidation and adsorption [2][3][4]. Adsorption is considered as the most effective method to reduce dyes contaminated in textile industrial wastewater [5].…”

Textile Organic Dyes – Characteristics, Polluting Effects and Separation/Elimination Procedures from Industrial Effluents – A Critical Overview

“…Dye concentrations in watercourses higher of 1 mg/L caused by the direct discharges of textile effluents, treated or not, can give rise to public compliant. High concentrations of textile dyes in water bodies stop the reoxygenation capacity of the receiving water and cutoff sunlight, thereby upsetting biological activity in aquatic life and also the photosynthesis process of aquatic plants or algae (Zaharia et al, 2009). The colour in watercourses is accepted as an aesthetic problem rather than an eco-toxic hazard.…”

“…The textile dyes represent a category of organic compounds, generally considered as pollutants, presented into wastewaters resulting mainly from processes of chemical textile finishing (Suteu et al, 2011a;Zaharia et al, 2009). The textile coloration industry is characterised by a very large number of dispersed dyehouses of small and medium size that use a very wide range of textile dyes.…”

“…specific mechano-physical, chemical, electrochemical processes, etc.) and also biological processes (Suteu et al, 2009;Zaharia, 2006;Zaharia et al, 2011). Table 6.…”

Studies on the adsorption of indigo dye from aqueous media onto carbonised sugarcane bagasse

“…In addition to imparting unwanted colours to water bodies, some dyes may degrade to produce toxic products (Hameed et al, 2008;Zaheer et al, 2014;Rizwana and Uma, 2015). Different physical and chemical treatments such as flocculation and coagulation (Rodrigues et al, 2013;Zahrim and Hilal, 2013), oxidation (Zaharia et al, 2009;Sohrabi et al, 2014), membrane separation (Zheng et al, 2013) and adsorption (Qiu et al, 2009;Sayal et al, 2012;Bharathi and Ramesh, 2013;Mittal et al, 2013) are used to treat dye containing waste water. Adsorption has been found to be superior to other methods for waste water recycling in terms of initial cost, simplicity of design, use of operation and insensitivity to toxic substances (Sayal et al, 2012).…”