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This study was designed to remove Pb (II) and Cd (II) from aqueous solution, shipyard wastewater, and sanitary landfill leachate using an alkaline-modified Rhizopus oryzae biomass. According to the Fourier transform infrared test, different functional groups like O–H, N–H, C= O, and P–O were detected in the bioadsorbent. The x-ray fluorescence (XRF) analysis showed that CaO, P 2 O 3, and SO 3 oxides have the highest content in the bioadsorbent. The surface area of modified Rhizopus oryzae was obtained as 20.32 m 2 g− 1. The effect of initial pH, temperature, contact time, and bioadsorbent dose on the metals removal was discussed. At optimal conditions, maximum Pb (II) and Cd (II) removal was obtained 95.66% and 94.55%, respectively. Freundlich model was well-accurately described the equilibrium data. Among four studied models, the pseudo-second-order was better able to describe the kinetic …