Proposta didática para o fenômeno físico-químico da adsorção usando experimentação como estratégia de ensino

Abstract

Considering that contemporary polluting processes cause several environmental problems, there is a need to use physical-chemical processes that minimize the impacts caused by human activities. One of these processes is adsorption, which can be applied in the treatment of water and also gases, reducing the rates of contaminants released into the environment. Considering the relevance of the phenomenon of adsorption, this didactic proposal aimed to articulate theoretical concepts and the daily life of students through problematization and experimentation involving the physical- chemical phenomenon of adsorption as a thematic approach. An activities manual was prepared following Teaching by Investigation as a methodological contribution. The material was tested with a group of freshmen in a Chemistry Licentiate course in the context of a general experimental chemistry discipline in order to verify its qualities in the mediation of proposed physical-chemical concepts. To this end, the activities carried out by the participants were analyzed and discussed regarding their content and alignment with the objectives of the manual. As a result, an analytical description of the prepared didactic material, the impressions of the participants and their responses to the mediated knowledge was presented. As final considerations, we bring the reflection that an experimental and investigative teaching approach is presented as a relevant strategy in Chemistry Teaching and that students apprehended several concepts mobilized in the activities and were able to establish relationships between the phenomenon of adsorption and their daily lives.