新型膨润土-无烟煤@Zetag（BT-An@Zetag）复合材料的制备及其对水溶液中砷（V）的去除。
Fabrication of Novel Bentonite-Anthracite@Zetag (BT-An@Zetag) Composite for the Removal of Arsenic (V) from an Aqueous Solution.
机构信息
Chemistry Department, College of Science, Jouf University, Sakaka 72341, Saudi Arabia.
Geology Department, Faculty of Science, Helwan University, Ain Helwan 11795, Egypt.
出版信息
Molecules. 2022 Nov 7;27(21):7635. doi: 10.3390/molecules27217635.
The arsenic (As) pollution of water has been eliminated via intensive scientific efforts, with the purpose of giving safe drinking water to millions of people across the world. In this study, the adsorption of As(V) from a synthetic aqueous solution was verified using a Bentonite-Anthracite@Zetag (BT-An@Zetag) composite. The SEM, FT-IR, XRD, DSC, TGA, and SBET techniques were used to characterize the (BT-An@Zetag) composite. The adsorption of As(V) was explored using batch adsorption under varied operating scenarios. Five kinetic modelswere used to investigate kinetic data, whereas three isotherms had been used to fit empirical equilibrium data. According to the findings, the adsorption mechanism of As(V) was best described by the Freundlich isotherm with a maximum monolayer coverage of 38.6 mg/g showing pseudo-second-order mode. The estimated enthalpy (H°) indicates that the adsorption process is both chemical and endothermic.The calculated free energy (G°) indicates that the reaction is nonspontaneous. After four sequential adsorption cycles, the produced BT-An@Zetag composite demonstrated good reusability and a greater adsorption affinity for As(V) ions. Overall, the BT-An@Zetag composite is suited for removing arsenic from wastewater using adsorption as a cost-effective and efficient technique.
经过密集的科学努力，水中的砷（As）污染已经得到了消除，目的是为全世界数百万人提供安全的饮用水。在这项研究中，使用膨润土-无烟煤@Zetag（BT-An@Zetag）复合材料验证了从合成水溶液中吸附 As(V)。采用 SEM、FT-IR、XRD、DSC、TGA 和 SBET 技术对（BT-An@Zetag）复合材料进行了表征。在不同操作条件下进行了批量吸附实验，研究了 As(V)的吸附。使用了五种动力学模型来研究动力学数据，而三种等温线则用于拟合经验平衡数据。研究结果表明，As(V)的吸附机制最好用 Freundlich 等温线描述，最大单层覆盖率为 38.6mg/g，表现出准二级模式。估计的焓（H°）表明吸附过程是化学和吸热的。计算出的自由能（G°）表明反应是非自发的。在四个连续的吸附循环后，所制备的 BT-An@Zetag 复合材料表现出良好的可重复使用性和对 As(V)离子更强的吸附亲和力。总体而言，BT-An@Zetag 复合材料适合通过吸附作为一种经济高效的技术从废水中去除砷。
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