Thongkam T, Hemavibool K, Klamtet J, Ouypornkochagorn S. Potential Adsorption of Leonardite for Heavy Metal Ions Removal from Aqueous Solution. SEJ [Internet]. 2020 Jun. 26 [cited 2024 Nov. 23];36(1):177-88. Available from: https://ejournals.swu.ac.th/index.php/sej/article/view/11524