Degradation of Remazol Black B dye and its simulated dyebath wastewater by advanced oxidation processes in heterogeneous and homogeneous media

Abstract

This study focused on the degradation of hydrolysed Remazol Black B (CI Reactive Black 5), a common diazo reactive dye, in aqueous solution. In the presence of various dye auxiliary chemicals a typical Remazol Black exhausted dyebath liquor simulated, which was then treated with homogeneous [ozonation with hydroxy ions, and Fe(II) or Fe(III) with hydrogen peroxide] and heterogeneous (titanium dioxide with UV‐A irradiation) advanced oxidation processes. Treatment performance of the investigated advanced oxidation systems was comparatively assessed in terms of the environmental sum parameters total organic carbon, biochemical oxygen demand and spectrophotometric measurements. The results obtained clearly reveal that the investigated advanced oxidation processes are capable of completely decolourising and partially mineralising the dye solution and its simulated dyebath effluent under predetermined reaction conditions. During the application of alkaline ozonation at an ozone dose of 2340 mg/ml, a three‐fold biodegradability enhancement was observed.

Degradation of endosulfan and lindane using Fenton’s reagent

“…However, pseudo-first-order reaction kinetics was observed by Arslan and Balcioglu (2001) for the degradation of Remazol black B dye and its simulated dyebath wastewater. Balci et al (2009) also reported that the degradation of …”

Fenton type processes for minimization of organic content in coloured wastewaters: Part I: Processes optimization

“…The result is the formation of perhydroxyl radicals which are significantly less reactive species than hydroxyl radicals and thus directly influence the efficiency of dye degradation [25]. According to the literature, typical values of Fenton reagent ratio are in the range between 1:5 and 1:25 [28,32]. The optimal operating parameters for RB49 degradation by Fenton process established on the basis of TOC measurements are Fe 2þ /H 2 O 2 ¼ 1:20, c(Fe 2þ ) ¼ 0.5 mM, pH 3, where maximal TOC removal of 72.1% was achieved (Fig.…”

Degradation of rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H2O2

“…Their elimination from wastewater effluents is now the subject of considerable concern of environmental remediation and has attracted many researchers in recent years. Most textile dyes are photolytically stable and refractory towards chemical oxidation [1] and these characteristics render them resistant towards decomposition by conventional biochemical and physico-chemical methods. Generally, adsorption on activated carbon, coagulation by a chemical agent or reverse osmosis was applied to such effluents [2,3].…”