Facile Hydrothermal Fabrication of Analcime and Zeolite X for Efficient Removal of Cd(II) Ions From Aqueous Media and Polluted Water
Facile Hydrothermal Fabrication of Analcime and Zeolite X for Efficient Removal of Cd(II) Ions From Aqueous Media and Polluted Water
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DOI：
10.1007/s10904-020-01565-y
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发表时间：
2020-05-05
影响因子：
4
通讯作者：
Youssef, Hany M.
中科院分区：
文献类型：
--
作者：
Hameed, Ahmed M.;Alharbi, Ahmed;Youssef, Hany M.
本文分别以L-丙氨酸和甘氨酸为有机结构导向剂，采用水热法合成了方沸石和X型沸石。XRD分析表明，X型沸石和方沸石的平均晶粒尺寸分别为94.85和146.06 nm。FE-SEM结果表明，X型沸石由八面体和立方相组成，平均粒径约为20 nm。2.78嗯。此外，方沸石由平均粒径约为0.005 μ m的球状体组成。9.50嗯。用FT-IR分光光度计测定了吸附水、铝醇、硅醇、Si-O-Si和Si-O-Al基团的振动。此外，所制造的产品被用于从水介质和废水中去除Cd（II）离子，所述水介质和废水是从埃及斋月市第10区的电镀厂收集的。伪二级模型和朗缪尔等温线与实验结果最吻合。X型沸石和方沸石对Cd（II）的去除是放热的，其H-o增量分别为-49.859和-61.647kJ/mol。此外，镉（II）离子的去除是自发的，因为在沸石X和方沸石的情况下的Δ G（o）的值分别为-101.678和119.669 kJ/mol，在298 K。方沸石和X型沸石的最大吸附容量分别为139.278和62.814 mg/g。此外，所制造的样品是可重复使用的，有效的，稳定的，并且可以反复使用，而不会放弃其对水溶液和废水中的Cd（II）离子的效率。
In this paper, analcime and zeolite X were fabricated using the hydrothermal method in the presence of L-alanine and glycine as organic structure-directing agents, respectively. The XRD confirmed that the average crystallite size of zeolite X and analcime products is 94.85 and 146.06 nm, respectively. Also, the FE-SEM confirmed that the zeolite X composed of an octahedron and cubic shapes with an average size of ca. 2.78 mu m. Besides, the analcime composed of droxtal shapes with an average size of ca. 9.50 mu m. Vibrations of adsorbed water, aluminol, silanol, Si-O-Si, and Si-O-Al groups were obtained using the FT-IR spectrophotometer. Moreover, the fabricated products were utilized for the removal of Cd(II) ions from aqueous media and wastewater which was collected from an electroplating factory in the 10th of Ramadan City, Egypt. The pseudo-second-order model and Langmuir isotherm were the best fittings for the experimental results. The removal of Cd(II) ions was exothermic because the values of increment H-o in the case of zeolite X and analcime were - 49.859 and -61.647 kJ/mol, respectively. Also, the removal of Cd(II) ions was spontaneous because the values of Delta G(o) in the case of zeolite X and analcime were - 101.678 and - 119.669 kJ/mol at 298 K, respectively. Besides, the maximum adsorption capacity of analcime and zeolite X was 139.278 and 62.814 mg/g, respectively. Moreover, the fabricated samples are reusable, effective, stable, and can be utilized over and over without surrendering their efficiency towards Cd(II) ions in aqueous solutions and wastewater.