H. Heydarzadeh, S. Gilani, N. Mokhtarian, M. Kolaei, and K. Soltani, “Removal of Cadmium from Aqueous Solution with Carboxymethyl Cellulose Hydro-gel: Adsorption Conditions and Affecting Factor”, ajc, vol. 24, no. 6, pp. 2721–2723, Feb. 2012.