Introducing environmental and sustainable chemistry topics using a nanotechnology approach: removing hazardous metal ions by means of humic-acid-modified superparamagnetic nanoparticles - Silva, Delmárcio Gomes da; Melo, Fernando Menegatti de; Silveira Junior, Alceu Totti; Cruz, Bruno Constancio da; Prado, Caio Cesar Pestana; Vasconcelos, Luana Cristina Pereira de; Lucas, Vitor Amaral Sanches; Toma, Henrique Eisi (Journal of Chemical Education, 2016)