Use of PET Structures for TiO2 Immobilization in the Decontamination of Textile Effluents: An analysis of kinetic models.

Use of PET Structures for TiO2 Immobilization in the Decontamination of Textile Effluents: An analysis of kinetic models.

• Autor
• Clarice Moraes Beserra
• Co-autores
• Evelle Duarte Carvalho Oliveira , Ivana Cecília Ferreira Araújo , Luciano Costa Almeida
• Resumo

• The textile industry, which is the most important part of the global economy, is a major source of environmental pollution due to the intensive use of synthetic dyes. This study investigated the adsorption of the textile dye reactive black 5 (RB5) using titanium dioxide (TiO2) immobilized in PET (polyethylene terephthalate reuse bottle) structures and TiO2 powder. Sample preparation involved creating PET monoliths and applying a TiO2 suspension via the washcoating technique. The adsorption kinetics were analyzed using pseudo-first order (PPO), pseudo-second order (PSO), and Elovich models. The results showed that the Elovich model provided the best fit for the experimental data, with R² values of 0.991 for TiO2/PET and 0.988 for TiO2 powder. The maximum adsorption capacities of the TiO2/PET and TiO2 powders were 13.92 and 18.96 mg.g-1, respectively, for the TiO2 powder, indicating the greater adsorption efficiency of the TiO2 powder. However, the use of TiO2 powder presents challenges related to the constant loss of material and the need for recovery, which makes the reuse process difficult. On the other hand, PET monoliths containing TiO2 showed promise because of their ease of recovery and reuse despite their low initial adsorptive capacity. This study demonstrates that although TiO2 powder offers greater adsorption efficiency, immobilization on PET substrates is a practical solution to recovering and reuse problems, making it a viable alternative to decontaminating textile effluents.

• Palavras-chave
• Monolith, PET, adsorption, dyes anionic, kinetic models.
• Área Temática
• Adsorção aplicada ao meio ambiente