1.
Wannawek A, Pookmanee P, Satienperakul S, Putharod R, Laorodphan N, Phanichphant S. Removable Pb (II) from aqueous solutions by adsorption onto natural and modified leonardite. Eng Appl Sci Res [internet]. 2016 Nov. 11 [cited 2026 Oct. 13];43:477-9. available from: https://ph01.tci-thaijo.org/index.php/easr/article/view/70839