Síntese e caracterização da zeólita ZSM-5 como adsorvente de corante vermelho BF-3 RS

Abstract

Among the emerging pollutants, the presence of dyes stands out, especially the red BF-3RS dyes, with the main escape route being sewage from the textile industry. This is due to their high use in the dyeing process, as they are effective in fixing fabric fibers. However, it draws attention mainly to the issue of toxicity to organisms, and some types of dyes may be carcinogenic agents. Added to the ineffective treatment of effluents by traditional methods of sewage treatment, there is a potential villain for public health, fauna and flora in the long term. Thus, methodologies for removing these compounds have been studied, highlighting the adsorption process, which presents high efficiency and

7 low cost. In this context, the adsorbent chosen was zeolite, aluminosilicates that present a network of channels that confer shape selectivity on a molecular scale, a high degree of hydration, stability of the crystalline structure when dehydrated, cation exchange properties, uniform channels, among others. Thus, firstly, the characterization of the zeolite was carried out using methods of X-ray Diffraction, Infrared Spectroscopy and Zero Charge Point. Thus, a subsequent study showed an adsorption of over 16% in one of the established parameters, even though it is not high, it is a path for future research in the area by varying the criteria. Furthermore, it was possible to study the adsorption isotherms that showed a linear character, which indicates a proportional behavior between the concentration of adsorbate and adsorbent. Finally, an evaluation of the adsorption kinetics complemented the research with satisfactory results, increasing the adsorption as time went by and the model that was most suitable for the experimental behavior was the pseudo second order model.