moses, okponmwense, and James M. Okuo. 2019. “Synthesis, Characterisation and Application of Capped Chromic Oxide Nanoparticle (CCONP) for The Removal of Cd2+ and Pb2+ Ion from Aqueous Solution”. Egerton Journal of Science and Technology 17 (1-139), 1-14. https://eujournal.egerton.ac.ke/index.php/EJ/article/view/31.