Adsorção do corante azul de metileno utilizando cacto mandacaru (Cereus Jamacaru): uma proposta para aulas práticas de química ambiental

Abstract

With the continuous expansion of the economy, industry and agriculture over time, the environment has been increasingly destroyed In this way, environmental education becomes very important, since it allows the formation of individuals who start to respect and conserve nature. Therefore, excellent training is needed, especially for environmental education for primary and secondary school teachers. In this sense, this work aimed to determine whether cactus mandacaru (Cereus Jamacaru) can be used as an adsorbent in the process of adsorption of the methylene blue dye, taking into account the parameters initial concentration, contact time and mass of the adsorbent. Evaluating the cost-benefit parameters, the relationship between the experiment and the course's syllabus and waste generation, the objective was to evaluate the potential of this experiment to assist in the teaching of the Environmental Chemistry course for undergraduate students in Chemistry. The results obtained showed that the adsorption of the selected dye is fast, it has an adsorption capacity of 36.18 mg g-1 with aremoval index greater than 90%, with the Pseudo-Second Order model being the most suitable for the results. experimental data, suggesting that the process is chemical. The evaluation of the investigated parameters (cost-benefit, relation between experiment and the discipline's syllabus and waste generation) showed that the experiment is promising in relation to its potential to be used to assist in the teaching of the Environmental Chemistry discipline.