Banca de DEFESA: THAIS JERUZZA MACIEL POVOAS SOUTO

PROPOSAL FOR THE REUSE OF DYES FROM THE TEXTILE INDUSTRY THROUGH THE APPLICATION OF NANOMATERIALS IN PROCESSES ADSORTIVES THROUGH BACTERIAL CELLULOSE

Dyes; bacterial cellulose; reuse

Currently, the state of the environment has demonstrated how important/vital it is invest in technologies that work with systems that allow the reuse or disposal of products, since the technologies are aimed towards greater sustainability, either by reducing the load of pollutants and effluents or reusing these environmental liabilities in a practical application, generating economy. Thus, in order to mitigate the environmental impacts of the production of organic dyes and pigments from the chemical processes existing within of the textile industry, between its molecule and its synthesis, this work sought to investigate the physical-chemical structural and morphological properties of the bioadsorbent, promoting the characterization of synthetic commercial dyes. while material bioadsorbent, bacterial cellulose was used as an alternative method of removal of ions through adsorption, functioning as an absorbent capable of effectively separate heavy metals due to its purity, elasticity and biocompatibility. To analyze the adsorption parameters made by cellulose bacterial, the study methodology used was the analysis of UV/Vis, ICP-OES, the Principal Component Analysis (PCA) and Thermogravimetric Analysis (TGA). Thus, it analyzes how much the use of recyclable technologies can promote a new way of using dyes, since nanofiltration can be contemplated by the membrane separation technique, which implies the promotion of sustainability.

Through the methodology used, it was obtained while results that textile dyes through adsorption kinetics presented a removal rate for C8 of approximately 16%, for C10 in an acid medium 41% and C10 in basic medium 30%. The adsorption kinetics can be well expressed by the pseudo-second order model, indicating the importance of adsorption chemistry in the process. Thus, using the Thermogravimetric Analysis, it was noted that the Bacterial cellulose begins to lose stability of its structure at 360ºC, reaching the apex at 555ºC disappearing from the experiment, forming a subdye for reuse in a new dyeing process. Thus, it was concluded that with the amount of metals identified in the chemical composition of the dye, it is pointed out how important was the use of bacterial cellulose, also, in the promotion of disposal, since the metal develops resistance to the environment environment, and likewise would be a source of inorganic pollutant with high mobility and high toxicity. After analyzing the data, the result is the importance of Bacterial Cellulose (BC) in the removal of dyes in effluents textile industries, as it degrades at a certain temperature and the dye becomes purified to be reused, thus protecting the environment and health human.