Chouchane, Toufik, et al. “Employment of a Silica Gel Formulated from Steel Slag to Remove Lead, Nickel and Cadmium in Aqueous Solution”. Iraqi Journal of Science, vol. 66, no. 10, Oct. 2025, pp. 4113-36, https://doi.org/10.24996/ijs.2025.66.10.9.