Water is essential for life, important for the ecosystem and it is in great demand due to its scarcity. This study explored the reuse of the wastewater of the Water Treatment Plant in Gramame for agricultural purposes. A qualitative and quantitative investigation of the effluent was carried out through the characterization of its physical and chemical parameters, comparing the results to what is allowed by the current legislation, CONAMA Resolution 357/2005. After this process, the activated charcoal of coco-da-baia mesocarp, adsorbent material, was prepared and tested in a filter system in a column with a continuous flow and ascendant entrance, in which the kinetic effect was evaluated. This technique was evaluated by correlating the reduced values in the adsorption material, respecting the initial effluent concentration, obtaining a reduction of 50% in the hardness, 87.5% in chloride and 66.6% in acidity. These results verified the adequacy of the technique in potential hydrogenation (pH) and abrupt reduction of color and turbidity. This treatment is suggested to qualify the effluent for use in agricultural, safe for humans and the environment. The adsorbent substrate efficiency was verified by correlating it with the Thomas isothermal model.
The waste generated in chemistry laboratories used in teaching, research and extension activities has been a modern concern, which in the past was neglected, but the current generation's awareness of the environmental problem has caused this issue to be rethought and practices with a more sustainable character, adopted. There is no question that reagents and solutions discarded by laboratories present themselves in concentrations inadequate to be released in conventional environments. In this sense, it is necessary to develop techniques and methods that provide the treatment and enable the emission of these effluents without causing damage to society and nature. In this work the application of crude kaolinite and its respective modifications in the literature (activated in acid and metacaulinite) in the treatment of laboratory effluent solution from a classical method of water quality analysis is carried out. These materials (crude kaolinite, acid activated and metacaulinite) were compared by factorial planning at determined intervals of time and mass in order to verify which conditions kaolinite has the best results in removing the ions in the laboratory effluent solution. The data showed that the crude species presents greater adsorption potential in relation to the modifications made, although such changes in properties are common in the specialized literature..
ResumoSeguir a carreira docente está se tornando uma opção cada vez mais rara entre os estudantes, acarretando no decréscimo na procura por esta carreira, quando comparado às outras profissões. Sendo argumentado pelos estudantes que a licenciatura apresenta uma baixa remuneração, tem-se o desrespeito por parte do corpo estudantil e a desvalorização social. Diante desta problemática, associada à evasão nos cursos de licenciatura, este trabalho buscou identificar o nível de interesse dos estudantes no Centro Profissionalizante Deputado Antônio Cabral (CPDAC) e no Instituto Federal de Educação, Ciência e Tecnologia da Paraíba (IFPB) quanto à percepção pela carreira docente, assim como o interesse pelo ingresso na Licenciatura em Química. Verificando que, de acordo com os resultados obtidos, grande parte do corpo estudantil não apresenta interesse em seguir a carreira docente, assim como há apenas uma minoria que, especificamente, desejam fazer Licenciatura em Química.Palavras-Chave: Incentivo, carreira docente, Química
Modo de acesso: World Wide Web Inclui bibliografia 1. Recursos Hídricos 2. Ecologia.3. Tecnologia I. Título CDD-333 O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos seus respectivos autores.
As representações sociais informam as concepções que os indivíduos possuem a respeito de um tema,permitindo interpretar e discutir a influência do meio sobre o pensamento do coletivo e, assim, seremutilizadas como instrumento avaliativo da aprendizagem e levantamento dos conhecimentos prévios doseducandos sobre determinada temática a ser abordada. Nessa perspectiva, a pesquisa objetivou avaliara representação social dos estudantes do 2º ano do Curso Técnico de Controle Ambiental Integrado aoEnsino Médio do IFPB, Campus João Pessoa, no ensino de Química, por meio da técnica de evocaçãolivre de palavras, a qual permitiu orientar e avaliar a contextualização da Química com a temáticaqualidade de água, bem como identificar que, nos resultados obtidos das palavras evocadas após aaplicação da metodologia houve uma aprendizagem significativa e a correlação mais efetiva dosconteúdos químicos com o cognitivo dos estudantes.
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