he adsorption of lead (II) and cadmium (II) ions from aqueous solutions by novel water hyacinth-based cellulose clay nanocomposite were studied and their adsorption performance established using the Langmuir, Dubinim-Radushkevich, Temkin and Freundlich isotherm models. The water hyacinth-based cellulose clay nanocomposite (CCNC) was synthesized by solution blending method, with poly vinyl alcohol solution as the dispersion medium. Characterization of the CCNC was done using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). According to the adsorption studies, Pb (II) ions were adsorbed by the CCNC material through a heterogeneous process, whereas Cd (II) was adsorbed through both monolayer and heterogeneous processes. While Freundlich and D-R isotherms were the best at explaining the adsorption of Pb (II), Langmuir, Temkin, and Freundlich isotherm models were most effective at explaining the adsorption of Cd (II). The adsorption process was exothermic, according to thermodynamic analyses. The pH value of 4, the adsorbent dose of 0.8g per 100 ml of contaminated water, the temperature of 25 °C, and the contact period of 30 to 120 minutes were shown to be the most effective conditions for the adsorption of Pb (II) and Cd (II) ions from wastewater. The highest percentage metal ion removal was observed to be 99.6 % (Cd2+) and 99.9 % (Pb2+).