Toan Phan P, Thanh Nguyen T, Huy Nguyen N, Padungthon S. A Simple Method for Synthesis of Triamine-SiO2 Material toward Aqueous Nitrate Adsorption: DOI: 10.32526/ennrj.17.4.2019.31. Environ. Nat. Resour. J. [internet]. 2019 Jul. 19 [cited 2025 Apr. 28];17(4):59-67. available from: https://ph02.tci-thaijo.org/index.php/ennrj/article/view/205216