Abstract In this study, we have prepared and characterized 3‑(trimethoxysilyl)‑1‑propanethiol functionalized mesoporous silica, KIT-6-SH, then investigated its efficacy in the sense of cadmium removal. KIT-6-SH was characterized by FT-IR spectroscopy, TGA, X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The obliteration of cadmium ions by KIT-6-SH was found to be mainly governed by surface adsorption. The elimination of cadmium ions from aqueous solutions was conducted using a batch method. Factors including the initial metal ion concentration, pH, and contact time were determined to be influential parameters on the sorption process. The sorption isotherm data were clearly described by the Langmuir model and maximum adsorption capacity for KIT-6-SH was 85 mg g−1. Moreover, a pseudo-second-order kinetic model was found to govern the sorption kinetics. According to these findings, it can be concluded that KIT-6-SH is well suited for the efficient and selective removal of cadmium ions from aqueous solutions.

中文翻译：

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低成本硫醇官能化介孔二氧化硅 KIT-6-SH，作为一种有用的吸附剂去除镉离子：KIT-6-SH 的吸附等温线和动力学研究

摘要 在本研究中，我们制备并表征了 3-(三甲氧基甲硅烷基)-1-丙硫醇官能化介孔二氧化硅 KIT-6-SH，然后研究了其去除镉的功效。KIT-6-SH 通过 FT-IR 光谱、TGA、X 射线衍射 (XRD) 和场发射扫描电子显微镜 (FE-SEM) 进行表征。发现 KIT-6-SH 对镉离子的消除主要受表面吸附控制。使用分批方法从水溶液中去除镉离子。包括初始金属离子浓度、pH 值和接触时间在内的因素被确定为对吸附过程的影响参数。Langmuir 模型清楚地描述了吸附等温线数据，KIT-6-SH 的最大吸附容量为 85 mg g-1。而且，发现伪二级动力学模型控制吸附动力学。根据这些发现，可以得出结论，KIT-6-SH 非常适合有效和选择性地去除水溶液中的镉离子。