Aplicação de celulose bacteriana produzida por Gluconacetobacter hansenii para remoção do corante amarelo reativo B2R

Abstract

Textile industry has presented a notable growth in the past decades, as well as the use of textile dyes. The most used dye in this industry is classified as a reactive dye. However, when not treated and discharged in the effluent, it is capable of causing serious damage in the riverbed. Adequate textile effluent to be discharged in the hydrous body may pass through a chemical, physical or biological treatment. The adsorption process has been appointed as one of the best methods for the dye removal. Although having a high cost, activated charcoal is the most used adsorbent. In the other hand, a technique that can be economically viable is biosorption. In general, it makes use of biomass (biosorbent) for pollutants removal. Many types of biosorbents have been studied as a substitution to activated charcoal, such as the bagasse from sugar cane, coconut shell and rice shell. These biosorbents demonstrate to have in common the cellulosic fibers. Based on this line of research, this papers intents to test the use of cellulose from bacterial origin (Gluconacetobacter hansenji) as a biosorbent. This type of cellulose was chosen due to its higher pureness when compared to cellulose from plant origin. Many tests were ran, beginning with preliminary tests, followed by the influence of pH and bacterial cellulose thickness in the biosorption, kinetic test and finally the reuse of bacterial cellulose. The results obtained demonstrate the viability of bacterial cellulose for the removal of reactive dye B2R and a mixture of dyes from industrial effluent. In addition, the reuse of bacterial cellulose is also possible.