Hasanah, M.; Wijaya, A.; Arsyad, F. S. .; Mohadi, R. .; Lesbani, A. Preparation of Hydrochar from Salacca Zalacca Peels by Hydrothermal Carbonization: Study of Adsorption on Congo Red Dyes and Regeneration Ability. sci. technol. indones. 2022, 7, 372-378.