H. Khazaal, Shaymaa. “Optimization and Adsorption Modeling of Lead Ions (II) on Carbonaceous Materials: Comparative Evaluation of Raw and Citric Acid-Modified Commercial Activated Carbon and Tea Waste Derived Biochar”. Iraqi Journal of Chemical and Petroleum Engineering, vol. 27, no. 1, Mar. 2026, pp. 127-42, https://doi.org/10.31699/IJCPE.2026.1.11.