MAINGI, F.; NG’ANG’A, M. M.; MBUVI, H. M.; HENRY MWANGI. Clay-Rice Husk Ash based Geopolymers for Remediation of Pb (II) and Cd (II) from Wastewater . Egerton Journal of Science and Technology, [S. l.], v. 17, n. 1-139, p. 15–28, 2019. Disponível em: https://eujournal.egerton.ac.ke/index.php/EJ/article/view/35. Acesso em: 20 jun. 2021.