Pb (II) Ion Removal from Aqueous Solutions by Adsorption Using Polypyrrole/Poly (Para Nitroaniline)/Poly (Para Hydroxyaniline) Applications of Composites in Soil Technology. American Journal of Language, Literacy and Learning in STEM Education (2993-2769), [S. l.], v. 4, n. 1, p. 121–126, 2026. Disponível em: https://www.grnjournal.us.e-scholar.org/index.php/STEM/article/view/8978. Acesso em: 26 jan. 2026.