A comparative evaluation is presented of physical and chemical treatments performed on coconut shell powder, in relation to the adsorption capacity of Cu²⁺/Cd²⁺ ions. The chemical treatment consisted of impregnation with monoethanolamine (mass ratio of 1:1) or a microemulsion (composed of 10 wt % sodium octanoate). The physical treatment was through steam explosion (P = 5 bar, T = 210 °C). Treatment efficiency was assessed using physical characterization of the adsorber material. Assessment of the ion adsorption capacity was performed in batch mode. The comparative investigation was carried out based on the Langmuir model constants, kinetic constants, and thermodynamic parameters. The efficiency of the modifications was also evaluated through adsorption-desorption cycles.

中文翻译：

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用化学和物理处理活化的椰壳粉吸附金属离子

对椰子壳粉进行的物理和化学处理与 Cu ²⁺ /Cd ²⁺离子的吸附能力进行了比较评估。化学处理包括用单乙醇胺（质量比为 1:1）或微乳液（由 10 wt% 辛酸钠组成）浸渍。物理处理是通过蒸汽爆炸（P  = 5 bar，T = 210°C）。使用吸附剂材料的物理特性评估处理效率。以分批模式进行离子吸附容量的评估。基于朗缪尔模型常数、动力学常数和热力学参数进行比较研究。改性的效率也通过吸附-解吸循环进行评估。