¿Qué tan verde es un experimento?

Galicia, Marina L. Morales; Martínez, Joel; Reyes‐Sánchez, Laura Bertha; Hernández, Osnieski Martín; Razo, Gabriel A. Arroyo; Valdivia, Adolfo Obaya; Ruvalcaba, René Miranda

doi:10.1016/s0187-893x(18)30140-x

Cited by 18 publications

(15 citation statements)

References 8 publications

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“…Contudo, o que se observa é um trabalho puramente mecânico de execução de um roteiro sistematizado que se pauta na (re)produção de resultados efêmeros, sendo, portanto, necessário o uso de instrumentos que excedam os fundamentos técnicos da Química Verde, restritos aos seus princípios, à análise do processo e ao desempenho do material (Andraos & Sayed, 2007;Morales Galicia, 2011;Ribeiro & Machado, 2013;Vargas-Rodríguez, 2016), inserindo aspectos educacionais inerentes à formação docente.…”

Section: Introductionunclassified

A Experimentação na Educação em Química Verde: uma Análise de Propostas Didáticas Desenvolvidas por Licenciandos em Química de uma IES Federal Paulista

Andrade

Zuin

2021

RBPEC

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Este trabalho busca analisar a inserção dos Princípios da Educação em Química Verde (EQV) nas propostas experimentais desenvolvidas pelos estudantes na disciplina de Experimentação na Educação Química do curso de Licenciatura em Química de uma Instituição de Ensino Superior (IES) federal localizada no estado de São Paulo. As propostas desenhadas pelos estudantes foram analisadas de acordo com os níveis de grau verde correspondentes aos Princípios da EQV. De acordo com as análises, verificou-se que as propostas caminharam de forma a contemplar níveis variáveis de grau verde, que, em geral, demonstraram um processo de aprendizagem em Química compatível à atuação responsável frente às dimensões tecnocientíficas, sociais, econômicas, geopolíticas e ambientais.

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Section: Introductionunclassified

A Experimentação na Educação em Química Verde: uma Análise de Propostas Didáticas Desenvolvidas por Licenciandos em Química de uma IES Federal Paulista

Andrade

Zuin

2021

RBPEC

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“…Hence the employment of methanol was avoided, and the selectivity was improved by ethyl acetate diminishing the waste. (b) Ethyl acetate, a green solvent, 22,47 was the best option, provoking the incidence of Principle #5 (the use of auxiliary substances [eg, solvents, separation agents, etc] should be made unnecessary wherever possible and innocuous when used) . 3 (c) A high prevalence of Principle #6 (energy requirements should be recognized for their environmental and economic impacts and should be minimized.…”

Section: Resultsmentioning

confidence: 99%

Plumbagin Extraction: A Green Study

Calzada-González,

Martínez,

Vargas-Rodríguez

et al. 2023

Natural Product Communications

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A green study was undertaken for the extraction of plumbagin, an important natural naphthoquinone, from the roots of Plumbago pulchella Boiss. In the first stage, four solvents were comparatively evaluated, acetone, n-hexane, ethyl acetate, and methanol; attending Principle #5, only green solvents (ethyl acetate and acetone) were underscored. In a second step, considering Principle # 6, various green alternative activating modes were assessed: two electromagnetic methods, microwave (MW) and near-infrared (NIR), in addition to mechanical approaches, ultrasound (US), and tribochemistry-mechanochemistry (TB-MCh). These green modes were studied in comparison to the classical mantle heating (MH) and finally with maceration (M). MW and US-MH ensued the better modes, and EtOAc (green) and n-hexane (non-green) displayed the best yields (0.027% and 0.025%, respectively). Focusing on Principle #11, the monitoring and quantification of the extractions were performed by GC-MS employing 8-hydroxyquinoline as a reference. Some other involved Principles (#1, #3, #7, #12) will be commented on in the discussion. As an important complement, a statistical technique based on the analysis of variance (ANOVA) and response surface methodology was used to establish the degree of dependence of the amount of plumbagin extracted with the parameters time and amount of root, in addition to a GC-MS validation process carried out according to ICH Q2 R2 2022 guidelines. Finally, it is convenient to highlight that the target plant is native to Mexico, and according to a profound literature search, no chemical information for Plumbago pulchella Boiss is accessible.

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“…Although the literature reports several metrics for evaluations of chemical processes in the laboratory, − it is observed that there is still a need for metrics that integrate Green and Sustainable Chemistry with the pedagogical aspects necessary for a critical formation - mainly regarding fundamental theoretical aspects, such as the experiment approach, scientific literacy, and learning models in Education for Sustainable Development, which guide the development of greener experimental proposals in teacher training in chemistry.…”

Section: Discussionmentioning

confidence: 99%

Formative Dimensions for Green and Sustainable Chemical Education: A Qualitative Evaluation Tool of the Formative Level of Experimental Processes

Andrade

Zuin

2023

J. Chem. Educ.

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This paper addresses the fundamentals, structuring, and application of a Formative Dimensions for Green and Sustainable Chemical Education (Formative Dimensions – GSCE) qualitative evaluation tool of experimental processes. This instrument was created considering the need to resignify laboratory practices in Chemical Education. Qualitative research conducted in a case study format analyzed its functionality considering two experimental proposals developed by students of “Green Chemistry” and “Experimentation in Chemical Education” disciplines in their initial course at a federal Higher Education Institution located in the State of São Paulo. The analyses of the dimensions identified and the graphic figures in the experiments revealed the essential elements that make a formative experiment. Formative Dimensions – GSCE aims at evaluations of the scopes and limits of experimental activities by teachers, students, and other educational agents and identification of aspects related to techniques and didactics for an individual’s socio-scientific formation.

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¿Qué tan verde es un experimento?

Cited by 18 publications

References 8 publications

A Experimentação na Educação em Química Verde: uma Análise de Propostas Didáticas Desenvolvidas por Licenciandos em Química de uma IES Federal Paulista

A Experimentação na Educação em Química Verde: uma Análise de Propostas Didáticas Desenvolvidas por Licenciandos em Química de uma IES Federal Paulista

Plumbagin Extraction: A Green Study

Formative Dimensions for Green and Sustainable Chemical Education: A Qualitative Evaluation Tool of the Formative Level of Experimental Processes

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