Treatment of Wastewater Containing Dye Mixture Using Pyrite Cinder in Heterogeneous Fenton Process

Abstract

Dyes and pigments are important industrial chemicals. The structures of dyes can be very diverse and complex, so the treatment of wastewater containing these chemicals can be very challenging. Fenton process is particularly attractive and effective to degrade a wide range of dyes. In order to reduce the expenses related to applying these processes, the use of waste materials in the heterogeneous Fenton process, as alternative sources of catalytic iron, is recently investigated in scientific literature. In this study effluent was obtained from dye house unit of carpet factory (Serbia) and it contained the mixture of six commercial dyes. Pyrite cinder, a residue from sulfuric acid production, was also used in this process as a source of catalytic iron. Effluent decolourization rate reached 75% under optimal condition. Additionally, the research included further characterization of obtained effluent in terms of mineralization and metal leaching. A significant degree of mineralization was achieved under the applied conditions. Although, dye degradation was satisfactory, the metal content of the solutions after the process suggests that an additional treatment step, by using lime, is necessary. Results indicated that the applied waste material is effective as iron source in modified Fenton processes for treatment of effluent containing mixture of dyes.

A mini review: Optimal dye removal by fenton process catalysed with waste materials

“…Acidic Fenton conditions lead to high solubilisation of present heavy metals as Pb, Cu and Zn, where additional step after heterogeneous treatment for their removal was needed. Likewise, obtained removal of six dyes mixture (702 mg/L) was satisfactory, but Pb, Cu, Cr and Cd were leached from a pyrite cinder surface after real textile effluent treatment (Kerkez et al, 2018). Besides solids without pre-treatment some waste materials should be modified prior Fenton reaction.…”

“…Only in wet process of cotton dying more than 100 L of water is spent per kg of textile. Also, unfixed dyes are a known problem in textile effluents, whose chemical structures widely differentiate (Kerkez et al, 2018;Kulić et al, 2018;Nasuha et al, 2017). Wastewater treatment is necessary to obtain an acceptable effluent quality for its discharge in the environment and thus contribute to industrial sustainability.…”

Modeling and optimization of simultaneous degradation of rhodamine B and acid red 14 binary solution by homogeneous Fenton reaction: a chemometrics approach

“…However, these approaches were unable to quantify organic pollutants independently in multicomponent systems. Additionally, a contribution from smaller organic intermediates may lead to inaccurate results [24,25].…”