El-Shahat, M.F., and A.M.A. Shehata. 2013. “Adsorption of Lead, Cadmium and Zinc Ions from Industrial Wastewater by Using Raw Clay and Broken Clay-Brick Waste”. Asian Journal of Chemistry 25 (8):4284-88. https://doi.org/10.14233/ajchem.2013.13940.