Acid-Activated Biochar From Pinus elliottii Pine Cone: Production, Characterization and High-Efficiency Adsorption of Methylene Blue . Scientific Insights, Hong Kong, v. 2, n. 1, p. 001, 2026. DOI: 10.64897/si.2026v2i1.001. Disponível em: https://achpub.com/SI/article/view/59. Acesso em: 15 oct. 2026.