Abstract In the present study, we attempted to synthesize a novel sorbent from the starch modified montmorillonite for the removal of Pb(II), Cd(II), and Ni(II) ions from aqueous solutions. Structure and properties of the adsorbent were characterized by Fourier-transformed infrared(FT-IR) spectroscopy, X-ray diffraction (XRD), and Field emission scanning electron microscopic (FE-SEM) techniques. Batch experiments were confirmed through the effect of different conditions including pH, contact time, initial metal concentration and adsorbent dose. Specifically, the optimum value of adsorbent dose was achieved as 20 g/l for the removal of almost metal ions. The adsorption data was fitted with the optimum pH value as 5 for all experiments. The contact time at which the uptake of maximum metal adsorption was observed within 45 min for Pb(II), 90 min for Cd(II), and 60 min for Ni(II). In addition, it was revealed in our study that the equilibrium data obeyed the Langmuir model, and the adsorption kinetic followed a pseudo second-order rate model. Obtained results were noticeable for a modified phyllosilicate adsorbent, and with such a simple and low-cost modification for montmorillonite, the potential of this material as an economical and effective adsorbent for the removal of metal ions from aqueous solution was considerably elevated.

中文翻译：

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淀粉改性蒙脱石用于去除水溶液中的 Pb(II)、Cd(II) 和 Ni(II) 离子

摘要 在本研究中，我们尝试从淀粉改性蒙脱石合成一种新型吸附剂，用于去除水溶液中的 Pb(II)、Cd(II) 和 Ni(II) 离子。吸附剂的结构和性能通过傅里叶变换红外（FT-IR）光谱、X射线衍射（XRD）和场发射扫描电子显微镜（FE-SEM）技术进行表征。通过不同条件的影响，包括 pH 值、接触时间、初始金属浓度和吸附剂剂量，确认了批量实验。具体而言，吸附剂剂量的最佳值为 20 g/l，以去除几乎金属离子。吸附数据拟合所有实验的最佳 pH 值为 5。在 45 分钟内观察到 Pb(II) 吸收最大金属吸附的接触时间，Cd(II) 为 90 分钟，Ni(II) 为 60 分钟。此外，我们的研究表明，平衡数据遵循朗缪尔模型，吸附动力学遵循伪二级速率模型。改性层状硅酸盐吸附剂所获得的结果是显着的，并且通过对蒙脱石进行如此简单和低成本的改性，该材料作为一种经济有效的吸附剂从水溶液中去除金属离子的潜力大大提高。