This research evaluated the biosorption potential of the 134% Yellow Reafix BR2 dye by the malt bagasse. Tests were conducted at batch conditions, under controlled agitation, pH, and temperature. The biosorbent was characterized through scanning electron microscopy and Fourier transform infrared spectroscopy, before and after biosorption. Malt bagasse presented a point of zero charge at 6.75. In the process variables evaluation, there was a greater biosorption potential in acidic pH, without a significant influence of size on the biosorbent particles. The equilibrium time was achieved in 360 min, with approximately 93% removal at the evaluated temperatures. The experimental data were best represented by the pseudo-second-order model. Biosorption was characterized as spontaneous and endothermic, with indicative of physical. Considering the equilibrium, the Langmuir isotherm was the one that best fit the experimental data, with a maximum biosorption capacity of 68.75 mg g-1 (at 303 K and pH 2). The removal suffered no significant interference with the presence of another dye nor with the increase of ionic strength. Thus, the malt bagasse shows potential to be used as a biosorbent in treatment systems of industrial effluents.

RESUMOEste trabalho teve como objetivo apresentar o projeto de extensão "Orquestrando a Reciclagem", desenvolvido pelo Grupo PET de Engenharia Química da Universidade Tecnológica Federal do Paraná, Campus Ponta Grossa, em parceria com o Instituto Reviver. Esta ação foi promovida para contribuir com a conscientização sobre reciclagem, sendo dividida em apresentação de conteúdo teórico, mesa redonda, jogo e oficina sobre instrumentos musicais a partir de material reciclado. Pode-se observar que a maioria das crianças não tinham conhecimento dos conceitos abordados e não faziam a reciclagem. Concluise que a utilização de brincadeiras e oficinas práticas auxiliou no processo de aprendizagem, além de enfatizar a importância de ações extensionistas que proponham soluções viáveis para problemas que afetam a comunidade externa à universidade.Palavras-chave: reciclagem; educação; extensão; lúdico. ABSTRACTThis study presents the outreach project "Orchestrating Recycling" carried out at Federal Technological University of Paraná -Campus Ponta Grossa by group PET of Chemical Engineering course, in partnership with Reviver Institute. It aimed to raise awareness about recycling. It was divided into presenting the theoretical content, group discussion, game and workshop on musical instruments created using recycled material. It was noted that the majority of the children did not have knowledge about the concepts discussed and did not recycle. It is possible to conclude that the use of playful activities and practical workshops improves the learning process. Besides, it demonstrates the importance of outreach actions that deal with solutions to problems faced by the community outside the university.