In this study, a metal‐phosphate layered/activated carbon (KMSP@AC) composed of potassium (K), manganese (Mn), tin (Sn) and phosphorous (P) was prepared by the solvothermal method. The proposed nanocomposite was used as an effective adsorbent to remove Cd(II), Co(II), Ni(II), Pb(II) and V(III) from water samples in oil‐rich areas prior to ICP‐OES analysis. The KMSP@AC was fully characterized using FTIR, SEM and EDX. Factors influencing the removal process (pH, adsorbent dosage, initial concentration and contact time) were studied and optimized. The experimental process was evaluated with kinetic and isotherm models. The adsorption isotherm investigation showed that the adsorption followed the monolayer Langmuir isotherm model with the maximum adsorption capacities of 25 mg/g (Cd²⁺), 31 mg/g (Co²⁺), 49 mg/g (Ni³⁺), 91 mg/g (Pb²⁺) and 141 mg/g (V³⁺). The kinetic studies indicated that the pseudo‐second‐order model is well‐fitted to the process with an appropriate correlation coefficient (R² > 0.99) at an equilibrium time of 120 min. The adsorption of metal ions on the surface of the adsorbent was mainly a physisorption process through electrostatic interactions.

中文翻译：

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使用分层的金属磷酸盐结合的活性炭纳米复合材料有效地从富油区的水中去除重金属离子

在这项研究中，通过溶剂热法制备了由钾（K），锰（Mn），锡（Sn）和磷（P）组成的金属磷酸盐层状/活性炭（KMSP @ AC）。拟议的纳米复合材料可作为有效吸附剂，在ICP-OES分析之前从富油区的水样中去除Cd（II），Co（II），Ni（II），Pb（II）和V（III）。使用FTIR，SEM和EDX对KMSP @ AC进行了全面表征。研究并优化了影响去除过程的因素（pH，吸附剂用量，初始浓度和接触时间）。用动力学和等温线模型评估了实验过程。吸附等温线研究表明，吸附遵循单层Langmuir等温模型，最大吸附容量为25 mg / g（Cd 2 ⁺），31 mg / g（Co ²⁺），49 mg / g（Ni ³⁺），91 mg / g（Pb ²⁺）和141 mg / g（V ³⁺）。动力学研究表明，拟二阶模型 在120分钟的平衡时间以合适的相关系数（R ² > 0.99）非常适合该过程。金属离子在吸附剂表面的吸附主要是通过静电相互作用的物理吸附过程。