Study of the catalytic activity of bovine bone powder impregnated with Fe(III) new material for the catalytic degradation of Indigo Carmine

Márcio G Coelho,Luciana S Duarte,José D Ardisson,Fabrício V De Andrade,Geraldo M De Lima,Rodinei Augusti

doi:10.26850/1678-4618eqj.v38.1.2013.p117-122

Márcio G Coelho, Luciana S Duarte + Show 4 more

Open Access

https://doi.org/10.26850/1678-4618eqj.v38.1.2013.p117-122

Copy DOI

Abstract

In this work, a composite consisting of bovine bone powder impregnated with Fe(III) ions was prepared and its performance evaluated as a catalyst for the degradation of the textile dye Indigo Carmine in aqueous medium. One of the advantageous features of this new material is that it is inexpensive, simple to prepare and the support, bovine bone, is one the final residue of food production. The material was fully characterized by X-ray powder diffraction (DRX), 57Fe-Mössbauer spectroscopy, surface area measurements (BET), atomic absorption spectrometry. The degradation of Indigo Carmine was monitored by ultraviolet spectroscopy in the visible region (UV-Vis) and the by-products characterized by direct infusion ESI(-)MS (electrospray ionization mass spectrometry in the negative ion mode).

Highlights

According to tests performed by the Ecological and Toxicological Association of the Dyestuffs Manufacturing Industry (ETAD) more than 90% of the 4,000 dyes normally used in industrial processes show some level of toxicity [1,2,3]
The studies on the degradation of dyes in aqueous solutions have usually focused on the discoloration efficiency promoted by advanced oxidative processes (AOPs), whereas less attention has been given to the characterization of by-products probably formed under these oxidative conditions or their toxicological properties
electrospray ionization mass spectrometry (ESI-MS) monitoring Electrospray ionization mass spectrometry in the negative ion mode, ESI(-)-MS, was used to characterize the by-products formed after the degradation of Indigo Carmine in aqueous solution as promoted by the catalytic system

Summary

Introduction

According to tests performed by the Ecological and Toxicological Association of the Dyestuffs Manufacturing Industry (ETAD) more than 90% of the 4,000 dyes normally used in industrial processes show some level of toxicity [1,2,3]. Several studies have linked azo pigments with basal cell carcinoma [5, 6], and some of their degradation products are even more toxic [7] Their industrial wastewaters are reason for concern, because of toxicological and environmental effects on a number of microorganisms and colour pollution [8]. Degradation of organic substrates in aqueous solution has been usually promoted by advanced oxidative processes (AOPs) [11]. A number of reports have described the application of AOPs to degrade dyes in aqueous solution. The studies on the degradation of dyes in aqueous solutions have usually focused on the discoloration efficiency promoted by AOPs, whereas less attention has been given to the characterization of by-products probably formed under these oxidative conditions or their toxicological properties.

Instrumentation and techniques

Results and discussion

Conclusions