HOAI LINH, Nguyen; KIM CHI, Ngo; LE MINH, Tran; NGOC PHUONG, Dang; XUAN TUNG, Nguyen; THUY TIEN, Do; HONG MINH, Pham Thi. Biochar of post-extraction coffee bean ground as materials for ammonium adsorption. <b>Vietnam Journal of Science and Technology</b>, Hanoi, VN, v. 62, n. 2, p. 324–334, 2024. DOI: 10.15625/2525-2518/17989. Disponível em: https://vjs.ac.vn/jst/article/view/17989. Acesso em: 11 jan. 2026.