Toeri, J. and Mungai, G. 2022. Adsorption of Pb(II), Hg(II) and Cu(II) ions on azacrown ether grafted chitosan films. African Journal of Science, Technology and Social Sciences. 1, 2 (Dec. 2022), 52–64. DOI:https://doi.org/10.58506/ajstss.v1i2.7.