Kieu, D.M.L. and Huynh, M.L. 2023. Researching alum water absorption by biocoal from rice straw in Tan Tien Commune, Tri Ton District, An Giang Province. Dong Thap University Journal of Science. 34 (Jun. 2023), 69–72. DOI:https://doi.org/10.52714/dthu.34.10.2018.629.