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The acute lethal toxicity of heavy metals, viz., lead and manganese in potable water is detoxified using Low cost KAZAs carbons which were prepared from bio-waste materials. Adsorption onto commercial activated carbon is still an expensive one. This problem is inundated with these indigenously prepared carbons. Activated carbons prepared from Pithacelobium dulce, Ipomoea batatas and Ipomoea batatas are used in manganese ion removal. Activated carbons prepared from Dolichos lablab, Brassica and Cajanus Cajan are used in lead ion removal. SEM, XRF, FT-IR and XPS studies are carried-out along...