KOSAIYAKANON, C.; KUNGSANANT, S. Adsorption of Reactive Dyes from Wastewater Using Cationic Surfactant-modified Coffee Husk Biochar: DOI: 10.32526/ennrj.18.1.2020.03. Environment and Natural Resources Journal, v. 18, n. 1, p. Page: 21-32, 30 Jul. 2019.