Heavy metal contamination in water is happening worldwide. Adsorption using activated carbon is a common choice for cleaning the wastewater. The drawback of activated carbon is the higher cost of production due to the need for high heat in the process. This work investigated on activated carbon produced from the abundantly available Leucaena leucocephala biomass in order to reduce the cost of raw material. The biomass was chemically activated at different activation temperatures. The produced activated carbon was characterized using SEM, FT-IR, surface analyzer, and TGA. Isothermic and thermodynamic studies were done to evaluate the adsorption properties of the activated carbon. It was found out that higher surface area can be obtained using the higher activation temperature. Higher NaOH to carbonized sample ratios also resulted in higher surface area for all activation temperatures, which are 662 m²g^-1 for 700 °C activation temperature, 735 m²g^-1 for 750 °C, and 776 m²g⁻¹ for 800 °C. Isothermic studies showed that all of the activated carbon that is produced from Leucaena leucocephala biomass are fit to the Langmuir isotherm, regardless of any activation temperature. Lastly, the thermodynamic study found out the adsorption process is endothermic, reflected by the positive value of ΔH^o. It can be concluded that Leucaena leucocephala is a promising alternative material for producing activated carbon.

水中的重金属污染正在全球范围内发生。使用活性炭吸附是清洁废水的常见选择。活性炭的缺点是由于该过程中需要高热量而导致较高的生产成本。这项工作研究了从大量可用的银合欢（Leucaena leucocephala）产生的活性炭生物质以降低原材料成本。生物质在不同的活化温度下被化学活化。使用SEM，FT-IR，表面分析仪和TGA对生成的活性炭进行表征。进行了等温和热力学研究，以评估活性炭的吸附性能。发现使用较高的活化温度可以获得较高的表面积。较高的NaOH与碳化样品的比率也导致所有活化温度的表面积都更大，对于700°C活化温度为662 m ² g ^-1，对于750°C为735 m ² g ^-1，和776 m ² g ^-1在800°C下。等温研究表明，由白金合欢生物质产生的所有活性炭都适合Langmuir等温线，而与任何激活温度无关。最后，热力学研究发现吸附过程是吸热的，反映在ΔH ^o的正值上。可以得出结论，银合欢是生产活性炭的有前途的替代材料。