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Our participation during The EGU General Assembly 2021 (Copernicus Meetings)

2021-05-01

Excellent talk by Dr. Dimitrios Giannakoudakis entitled: Supreme and selective capture of one of the most dangerous metal, URANIUM, by phosphonate-functionalized ordered mesoporous silica: surface chemistry matters the most”. 

About the talk: Designing of materials for effective uranium removal remains an open challenge. In the present work, we present a one-step co-condensation synthesis of a phosphonate functionalized ordered mesoporous silica (OMS-P). This novel material was characterized by various physicochemical methods (HR-TEM, SEM, N2 sorption, XPS, solid NMR, low-angle XRD, and FTIR) and its ability to remove U(VI) by adsorption from aqueous solutions was studied. The maximum adsorption capacity reached 345 mg/​g in 10 minutes, the highest reported up to day for silicas at pH = 4 and almost four times higher than for the unfunctionalized silica. Even more interestingly, the coexistence of other cations, such as Eu(III), did not affect adsorption capacity and selectivity. The adsorption results were evaluated based on various theoretical models in order to conclude regarding the kinetics. Moreover, the main interactions responsible for the increased U(VI) removal efficiency and in general the role of surface chemistry were analyzed by spectroscopic characterizations of OMS-P before and after adsorption.

Find more at: https://​meetin​gor​ga​ni​zer​.coper​ni​cus​.org/​E​G​U​21​/​E​G​U​21​-​16251​.html

Our participation during The EGU General Assembly 2021 (Copernicus Meetings)

The vPICO presentation (“virtual”) took place on Friday, 30 April 2021, 11:49 CEST. For details of the corresponding presentation as well as of the session programme please see:

https://​meetin​gor​ga​ni​zer​.coper​ni​cus​.org/​E​G​U​21​/​s​e​s​s​i​o​n​/​39184

How to cite: Giannakoudakis, D. A., Anastopoulos, I., Barczak, M., Αntoniou, Ε., Terpiłowski, K., Sigarikar, E. M., Shams, M., Coy, E., Bakandritsos, A., Katsoyiannis, I. A., Colmenares, J. C., and Pashalidis, I.: Supreme and selective capture of one of the most dangerous metal, URANIUM, by phosphonate-functionalized ordered mesoporous silica: surface chemistry matters the most, EGU General Assembly 2021, online, 19 – 30 Apr 2021, EGU21-16251, https://​doi​.org/​10​.​5194​/​e​g​u​s​p​h​e​r​e​-​e​g​u​21​-​16251, 2021.

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