Síntese do biodiesel a partir do reuso de óleos de soja como possibilidade de problematização no ensino de química

Abstract

As studies, significant quantities of chemical compounds are emitted into the atmosphere, mainly produced from motor vehicles. Another point is the growing demand for sustainable energy, inducing the search for new energy sources, such as biodiesel, which can be synthesized by low cost raw materials, for example, from waste soybean oil, which often it is improperly discarded, being considered inadvisable as a waste to be discarded into the environment. Based on these aspects, such as fuels, biofuels and renewable energy, the advantage of a trend known as Science, Technology and Society and Environment (CTSa) to suggest a proposal that aims at providing students with problem situations that they should be resolved in a democratic and citizen form. All this context motivated the search for teaching methodologies and its implications in chemistry and social education of these students. Then it was shared the three pedagogical moments proposed by Delizoicov (Problematization Home (PI), Knowledge Organization (OC) and Knowledge Application (CA)). (Delizoicov (1980; 1982; 1991)). The first time was carried out questioning around environmental issues, the second time chances were created which led students to make a decision and the third time covering the previous two times occurred to the application of knowledge, synthesizing biodiesel from waste oil soy and conducting quality test.