Yakubu, Azeh, Gabriel Ademola Olatunji, and Folahan Amoo Adekola. “Modified/Unmodified Nanoparticle Adsorbents of Cellulose Origin With High Adsorptive Potential for Removal of Pb(II) From Aqueous Solution”. European Scientific Journal, ESJ 13, no. 27 (September 30, 2017): 425. Accessed January 25, 2022. https://eujournal.org/index.php/esj/article/view/9929.