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Removal of of Pb(II), Cd(II), Cu(II) and Ni(II) Ions from Aqueous Solution Using Pentaclethra Macrophylla Stem Activated Carbon. Pak. J. Anal. Environ. Chem. [Internet]. 2018 Dec. 28 [cited 2025 Jul. 7];19(2):195 – 204. Available from: https://pjaec.pk/index.php/pjaec/article/view/192