Degradation of Anthraquinone Dye Reactive Blue 4 in Pyrite Ash Catalyzed Fenton Reaction

Abstract

Pyrite ash (PA) is created by burning pyrite in the chemical production of sulphuric acid. The high concentration of iron oxide, mostly hematite, present in pyrite ash, gives the basis for its application as a source of catalytic iron in a modified Fenton process for anthraquinone dye reactive blue 4 (RB4) degradation. The effect of various operating variables such as catalyst and oxidant concentration, initial pH and RB4 concentration on the abatement of total organic carbon, and dye has been assessed in this study. Here we show that degradation of RB4 in the modified Fenton reaction was efficient under the following conditions: pH = 2.5; [PA]0 = 0.2 g L−1; [H2O2]0 = 5 mM and initial RB4 concentration up to 100 mg L−1. The pyrite ash Fenton reaction can overcome limitations observed from the classic Fenton reaction, such as the early termination of the Fenton reaction. Metal (Pb, Zn, and Cu) content of the solution after the process suggests that an additional treatment step is necessary to remove the remaining metals from the water. These results provide basic knowledge to better understand the modified, heterogeneous Fenton process and apply the PA Fenton reaction for the treatment of wastewaters which contains anthraquinone dyes.

Application of impregnated biocarbon produced from soybean hulls in dye decolorization

“…Higher oxidant amounts reduced the process efficiency, due to production of less active hydroperoxylic radicals ( • OOH) and H2O [30]. Similar outcome was observed in literature [40] in the Fenton reaction between pyrite ash and RB4 dye, where 99.5 % removal was achieved with the initial H2O2 concentration of 4 mM. Moreover, the influence of Fe-WSH dose is important and beneficial for dye removal by heterogeneous Fenton reaction.…”

Degradation of Nile blue sulphate dye onto iron oxide nanoparticles: Kinetic study, identification of reaction intermediates, and proposed mechanistic pathways

“…Synthetic dyes are used in various industries like textile industry, leather tanning industry, and paper production due to their wide color spectrum and excellent coloring properties . The dyes employed in these industries are the azo, anthraquinone, sulfur, oxazine, triphenylmethyl (trityl), and phthalocyanine derivatives . But, during the coloring process, unreacted and excess dyes are discharged in the effluent stream.…”

Enhanced Reactive Blue 4 Biodegradation Performance of Newly Isolated white rot fungus Antrodia P5 by the Synergistic Effect of Herbal Extraction Residue

“…Anthraquinone dyes are the second largest group after azo dyes and are widely used in commercial and industrial applications ( Sugano et al, 2009 ; Becelic-Tomin et al, 2014 ). Anthraquinone dyes are derived from anthraquinone and have a quinoid ring as the chromophore.…”