The Comparative Study of Pure Mesoporous Silica SBA-15 and CPTMS-SBA-15 Adsorption of Pb Heavy MetalJaka Fajar Fatriansyah, Donanta Dhaneswara, Frans Wensten Situmorang, Aloysius Brahmarsi, Farhan Delayori, Utami A.A. Siti and Dessy Prawesti KusumawardhaniE3S Web Conf., 65 (2018) 05016DOI: https://doi.org/10.1051/e3sconf/20186505016