当前位置: X-MOL 学术Adsorption › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
In-situ cost-effective synthesis of zeolite A in Al2O3–SiO2 glass fibers for fixed bed adsorption of Cu2+, Cd2+ and Pb2+
Adsorption ( IF 3.0 ) Pub Date : 2021-08-25 , DOI: 10.1007/s10450-021-00337-5
Antonia M. M. França 1 , Marcos V. M. Nascimento 1 , Ronaldo F. Nascimento 1 , Raquel A. Bessa 2 , Edipo S. Oliveira 2 , Adonay R. Loiola 2 , Francisco M. T. Luna 3
Affiliation  

The in-situ coating of zeolite crystals on Al2O3–SiO2 glass fiber was investigated using two commercial fibers (FB1 and FB2). The fibers were submitted to hydrothermal treatment at different temperatures, resulting in the crystallization of zeolite on their surfaces. The materials obtained were characterized by X-ray fluorescence, X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. Batch and fixed bed essays were carried out to evaluate the performance of the materials in the adsorption Cu2+, Cd2+ and Pb2+ from aqueous solutions, at 28 ± 2 °C. The syntheses in which the FB1 sample was employed resulted in zeolite A as the only crystalline phase. The exception was the FB1-100 material which sodalite was also formed. When FB2 samples were used, only the FB2-85 material indicated resulted in zeolite A without secondary phases, while the other materials presented a mixture of phases. The materials FB1-95 and FB2-95 presented better performance in batch adsorption experiments than the other samples, with Qe for FB1-95 being 0.049 mmol g−1 for the three metal ions, and Qe for FB2-95 being 0.043, 0.047, and 0.049 mmoL g−1 for Cu2+, Cd2+ and Pb2+, respectively. Therefore, these samples were selected for the study of fixed bed adsorption. The following adsorption order was verified: Pb2+ > Cd2+ > Cu2+. Linear Driving Force (LDF) model proved to be suitable for the adsorption experimental data, confirming the high potential of the FB1-95 and FB2-95 materials for the adsorption of Cu2+, Cd2+ and Pb2+ in aqueous solution.



中文翻译:

在 Al2O3-SiO2 玻璃纤维中原位低成本合成沸石 A 用于固定床吸附 Cu2+、Cd2+ 和 Pb2+

使用两种商业纤维(FB1 和 FB2)研究了沸石晶体在 Al 2 O 3 -SiO 2玻璃纤维上的原位涂层。纤维在不同温度下进行水热处理,导致其表面沸石结晶。所得材料通过X射线荧光、X射线衍射、傅里叶变换红外光谱和扫描电子显微镜进行表征。进行批量和固定床论文以评估材料在吸附 Cu 2+、Cd 2+和 Pb 2+ 中的性能从水溶液中提取,温度为 28 ± 2 °C。使用 FB1 样品的合成导致沸石 A 作为唯一的结晶相。唯一的例外是 FB1-100 材料,它也形成了方钠石。当使用 FB2 样品时,只有所示的 FB2-85 材料产生没有第二相的沸石 A,而其他材料则是相的混合物。材料 FB1-95 和 FB2-95 在批量吸附实验中表现出比其他样品更好的性能,FB1-95 的 Qe 为 0.049 mmol g -1三种金属离子,FB2-95 的 Qe 为 0.043、0.047,Cu 2+、Cd 2+和 Pb 2+为0.049 mmol g -1, 分别。因此,选择这些样品用于固定床吸附的研究。验证了以下吸附顺序:Pb 2+ > Cd 2+ > Cu 2+。线性驱动力 (LDF) 模型证明适用于吸附实验数据,证实了 FB1-95 和 FB2-95 材料在水溶液中吸附 Cu 2+、Cd 2+和 Pb 2+的高潜力。

更新日期:2021-08-26
down
wechat
bug