Batteries, oil refining, dye production, lead mine drainage, and other sources are the principal sources of lead-containing waste water. The current research investigations were focused on the physico-chemical interaction with an adsorbent (made from SeaweedPowder (SP)) to remove Pb2+ ions from waste water. SP adsorbent was prepared and examined using scanning electron microscopy, FT-IR, UV-visible. Through adjusting the pH, reaction duration, Pb2+ concentration, and temperature, the adsorption property of SP was investigated. Systematic research has been done on selectivity, adsorption mechanisms, and reusability. The mass loss of SP at 333K, as determined by thermodynamic analysis. Our experimental findings from adsorption investigations revealed that temperature and adsorption efficiency were linearly related, while the initial metal level and adsorption effectiveness were inversely related.The observed experimental results indicated that the maximum temperature was 333K and the adsorption ability was 193 mg/g (94.87%). According to the equilibrium and thermodynamic findings, the Langmuir model (qmax =246.29mg/g and b= 0.79 L/mg) provided a more accurate description of the process. The adsorption procedure included both endothermic (Δ H = 52.349 kJ/mol) and spontaneous (Δ G = -24.104 kJ/mol) components. The electrostatic and chelation interactions between hydroxyl/amino groups and metal ions led to the optimized pH of 5. The adsorption behavior is well explained by Langmuir, and pseudosecond order kinetic models, demonstrating that the chemical reaction is the rate-limiting step and that the adsorption mechanism is monolayer adsorption. The adsorption was endothermic, impulsive, and practical, according to studies on thermodynamics. It is hoped that the developed SP will work well and last a long time to remove lead ions from wastewater.