Kosaiyakanon, Chatsuda, and Suratsawadee Kungsanant. “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 18, no. 1 (July 30, 2019): 21–32. accessed December 10, 2025. https://ph02.tci-thaijo.org/index.php/ennrj/article/view/207229.