Raghuwanshi, P.B., et al. “Adsorption of Lead(II), Cadmium(II) and Copper(II) Ions on Agricultural Byproducts ”.
Asian Journal of Chemistry
, vol. 15, no. 3, Mar. 2010, pp. 1531-4, https://asianpubs.org/index.php/ajchem/article/view/21833.