Synthesis and Characterization of Utsa-76 Metal Organic Framework Structure and Its Use as Adsorbent for the Removal of Radioactive Uranium (vi)
No Thumbnail Available
Date
2020
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Bu yüksek lisans tezinde, Lewis bazik gruplar içeren ve UTSA-76 olarak kodlanan metal organik kafes yapısı sentezlenip karakterize edilmiş ve adsorpsiyon tekniği kullanılarak U (VI)'nın sıvı fazdan uzaklaştırılması amacıyla kullanıldı. Bu yeni adsorbent malzemeyi, adsorpsiyon işlemi öncesi ve sonrasında tanımlamak için 1H, 13C-NMR, P-XRD, TEM, TEM-EDX, SEM ve SEM-EDX haritalama teknikleri uygulandı. U (VI)'nın hazırlanan UTSA-76 yapısı üzerinde adsorpsiyonu; pH, sıcaklık, karıştırma süresi ve çözelti derişimi parametrelerine bağlı olarak araştırıldı. Adsorpsiyon sürecinin kinetiğinde, sadece Pseudo ikinci dereceden kinetik değil, aynı zamanda film difüzyonu da etkili olmuştur. U (VI)'nın UTSA-76 üzerindeki adsorpsiyon dengesi Langmuir izoterm modeli ile daha iyi açıklanmıştır ve Langmuir izoterminden qmax değeri 91.31 mg/g olarak hesaplanmıştır. Dolayısıyla, yeni sentezlenen MOF yapısının (UTSA-76), çok düşük uranyum derişimlerinde ve küçük adsorbent kütlelerinde bile U (VI)'nın sulu ortamdan uzaklaştırılması için oldukça etkili bir alternatif adsorbent olabileceği sonucuna varılmıştır.
In this master thesis, UTSA-76 encoded MOF structure containing Lewis basic groups was efficiently synthesized and characterized for the removal of U (VI) from liquid phase by using adsorption tenhnique. 1H, 13C-NMR, P-XRD, TEM, TEM-EDX, SEM and SEM-EDX mapping techniques were applied to define this new adsorbent material. Adsorption of U (VI) on the synthesized UTSA-76 structure was investigated depending on the parameters of pH, temperature, mixing time and solution concentrations. In the kinetic of adsorption process, not only the pseudo-second-order kinetic, but also film diffusion was effective. The adsorption equilibrium of U (VI) on UTSA-76 explained better by Langmuir isotherm model and the qmax from Langmuir isotherm was calculated as 91.31 mg/g. The newly synthesized MOF structure (UTSA-76) has been considered to be a highly effective adsorbent alternative for the removal of U (VI) even at very low uranium concentrations and small adsorbent mass.
In this master thesis, UTSA-76 encoded MOF structure containing Lewis basic groups was efficiently synthesized and characterized for the removal of U (VI) from liquid phase by using adsorption tenhnique. 1H, 13C-NMR, P-XRD, TEM, TEM-EDX, SEM and SEM-EDX mapping techniques were applied to define this new adsorbent material. Adsorption of U (VI) on the synthesized UTSA-76 structure was investigated depending on the parameters of pH, temperature, mixing time and solution concentrations. In the kinetic of adsorption process, not only the pseudo-second-order kinetic, but also film diffusion was effective. The adsorption equilibrium of U (VI) on UTSA-76 explained better by Langmuir isotherm model and the qmax from Langmuir isotherm was calculated as 91.31 mg/g. The newly synthesized MOF structure (UTSA-76) has been considered to be a highly effective adsorbent alternative for the removal of U (VI) even at very low uranium concentrations and small adsorbent mass.
Description
Keywords
Kimya, Uranyum, Çevre kirliliği, Chemistry, Uranium, Environmental pollution
Turkish CoHE Thesis Center URL
WoS Q
Scopus Q
Source
Volume
Issue
Start Page
End Page
122