Palapa, Neza R., Tarmizi Taher, Novie Juleanti, Normah Normah, and Aldes Lesbani. “Biochar from Rice Husk as Efficient Biosorbent for Procion Red Removal from Aqueous Systems”. Applied Environmental Research 43, no. 3 (July 27, 2021): 79–91. accessed December 7, 2025. https://ph01.tci-thaijo.org/index.php/aer/article/view/242851.