Saad Eman M, Wagdy Manar, Orabi Adel S
Chemistry Department, Faculty of Science, Suez University, Suez, Egypt.
Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt.
Sci Rep. 2024 Oct 9;14(1):23614. doi: 10.1038/s41598-024-71979-y.
This research focuses on the utilization of nano glauconite clay as an environmentally friendly sorbent for the removal of cationic dyes, particularly Methylene Blue (MB), from polluted water. The glauconite clay was sourced from the El Gidida region of Egypt and subjected to grinding in a laboratory-type ball mill to ensure homogeneity and increase the active sites available for the adsorption process. The resulting ball milled nano clay (BMNC) was characterized using techniques such as X-ray fluorescence (XRF), Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The concentration of MB dye was monitored using UV-Vis spectroscopy to assess the adsorption capacity of BMNC under various conditions including pH, time, dose, and temperature. The optimal conditions for the adsorption process were determined to be a pH range of 7-8, a contact time of 60 min, and a dose of 200 ppm, resulting in an adsorption capacity of 128 mg/g. This process demonstrated both low cost and high speed. The adsorption mechanism of MB on the BMNC surface was evaluated through kinetics, adsorption isotherms, and thermodynamics. The experimental data indicated an endothermic, spontaneous, and thermodynamically favourable adsorption process, which was further supported by simulated modelling results using Forcite program. The in-silico data aligned well with the experimental findings. Additionally, the study assessed the interference of salts, metal ions, and other dyes on MB adsorption onto BMNC, showing promising results. These findings strongly support the effectiveness of our sorbent substrate under challenging conditions.
本研究聚焦于利用纳米海绿石粘土作为一种环保型吸附剂，用于去除污染水中的阳离子染料，特别是亚甲基蓝（MB）。海绿石粘土取自埃及的吉迪达地区，并在实验室型球磨机中进行研磨，以确保其均匀性并增加可用于吸附过程的活性位点。使用X射线荧光光谱（XRF）、傅里叶变换红外光谱（FT-IR）、透射电子显微镜（TEM）、能量色散X射线光谱（EDS）和X射线衍射（XRD）等技术对所得的球磨纳米粘土（BMNC）进行表征。使用紫外可见光谱监测MB染料的浓度，以评估BMNC在包括pH值、时间、剂量和温度等各种条件下的吸附能力。确定吸附过程的最佳条件为pH值范围7 - 8、接触时间60分钟和剂量200 ppm，吸附容量为128 mg/g。该过程显示出低成本和高速度的特点。通过动力学、吸附等温线和热力学对MB在BMNC表面的吸附机制进行了评估。实验数据表明这是一个吸热、自发且热力学有利的吸附过程，使用Forcite程序的模拟建模结果进一步支持了这一点。计算机模拟数据与实验结果吻合良好。此外，该研究评估了盐、金属离子和其他染料对MB吸附到BMNC上的干扰，结果很有前景。这些发现有力地支持了我们的吸附剂底物在具有挑战性的条件下的有效性。
