In our current work, we have established a novel approach in the synthesis of a new adsorbent by using choline chloride and urea (DES)/orthophosphoric acid (H₃PO₄) as our activating agent and palm kernel shell (PKS) as our precursor. The resulting activated carbon (DES/H₃PO₄-6002:3) was used to adsorb Pb(II) from aqueous solution. Characterization of DES-H₃PO₄-6002:3 by nitrogen adsorption/desorption isotherm measurements, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) demonstrated good micropores structure and high surface area that makes DES/H₃PO₄-600 2:3 a suitable alternative for liquid phase adsorption. The fundamental batch experiment of DES/H₃PO₄-600 2:3 was investigated by different parameters (such as concentration, pH, temperature and absorbent dose). The results obtained indicated that Langmuir model and pseudo-second-order equation best fit the data, indicating that the adsorption was controlled by chemical reaction and monolayer uptake. In addition, the fabrication of DES/H₃PO₄ AC exhibits good potential for Pb(II) ions uptake, including its high adsorption capacity (97.1 mg/g) and good recyclability. The future potential of this works lies in the identification of alternatives to environmental benign synthesis AC and reuse of Pb(II) ion–laden biosorbent after heavy metal uptake.

在我们目前的工作中，我们已经建立了一种新的吸附剂合成方法，该方法采用氯化胆碱和尿素（DES）/正磷酸（H ₃ PO ₄）作为活化剂，而棕榈仁壳（PKS）作为前体。所得的活性炭（DES / H ₃ PO ₄ -6002：3）用于从水溶液中吸附Pb（II）。通过氮吸附/解吸等温线测量，扫描电子显微镜（SEM），X射线光电子能谱（XPS）和热重分析（TGA）对DES-H ₃ PO ₄ -6002：3进行表征，证明了良好的微孔结构和高表面积使DES / H ₃ PO ₄-600 2：3是液相吸附的合适替代方法。通过不同的参数（例如浓度，pH，温度和吸收剂量）研究了DES / H ₃ PO ₄ -600 2：3的基本批处理实验。所得结果表明，Langmuir模型和拟二阶方程最适合该数据，表明吸附受化学反应和单层吸收的控制。另外，DES / H ₃ PO ₄的制造AC具有良好的吸收Pb（II）离子的潜力，包括其高吸附容量（97.1 mg / g）和良好的可回收性。这项工作的未来潜力在于确定环境良性合成AC的替代方法，以及重金属吸收后重载Pb（II）离子的生物吸附剂的再利用。