Introducing Environmental and Sustainable Chemistry Topics Using a Nanotechnology Approach: Removing Hazardous Metal Ions by Means of Humic-Acid-Modified Superparamagnetic Nanoparticles

• Delmárcio Gomes da Silva ^[1] ; Fernando Menegatti de Melo ^[1] ; Alceu Totti SilveiraJr. ^[1] ; Bruno Constancio da Cruz ^[2] ; Caio Cesar Pestana Prado ^[2] ; Luana Cristina Pereira de Vasconcelos ^[2] ; Vitor Amaral Sanches Lucas ^[2] ; Henrique Eisi Toma ^[1]
  1. [1] Universidade de São Paulo

     Universidade de São Paulo

     Brasil

     
  2. [2] Centro Estadual de Educação Tecnológica Paula Souza, Brazil
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 93, Nº 11, 2016, págs. 1929-1934
• Idioma: inglés
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• Resumen

  • A laboratory experiment has been developed to illustrate environmental and sustainability aspects, focusing on the wastewater treatment by means of superparamagnetic nanoparticles functionalized with humic acid. The experiment, conducted by a group of high school students, involves nanoparticle synthesis and minor characterization, followed by their interaction with typical metal ion contaminants in water. Coordination chemistry concepts were explored to help students understand the experiment, using competitive agents, such as ammonia, for recovering and recycling the nanoparticles, highlighting the great affinity of humic acid for the metal ions.