Kaolinite clay obtained from Longyan, Chinawas investigated to remove heavymetal ions fromwastewater. Thus,the present study includes the adsorption of Pb (II), Cd (II), Ni (II) and Cu (II) in aqueous solution on kaolinite clay through the process of adsorption under various conditions (with variable concentration ofmetal ion, amount of clay, pH and mixing time). Increasing pH favours the removal of metal ions till they are precipitated as the insoluble hydroxides. The uptake is rapid with maximumadsorption being observed within 30 min for Pb (II), Cd (II), Ni (II) and Cu (II). In addition, the results obtained fromadsorption isothermindicated that these data can be better fittedwith the Freundlich equation than the Langmuir equation. Furthermore, the XRD patterns confirmed that this kaolinite clay sample ismainly a mixture of kaolinite and illite clays. The SEMimages of samples showed irregular surface morphology. Finally, this kaolinite clay was used for removing metal ions fromrealwastewater such as Pb (II), where its concentration was reduced from 160.00 to 8.00mg/L.