Study of the use of graphene oxide and graphene oxide immobilized in poly(divinylbenzene) matrix for treatment of Cesium-137 liquid radioactive waste
Description
Due to the presence of hydroxyl, epoxy, carbonyl and carboxyl groups on its surface, graphene oxide (GO), synthesized from graphite, has attracted attention as a high adsorbent of cation removal and several contaminants from aqueous solutions. This work aims to evaluate the potential of graphene oxide (GO) and its immobilized form as poly(divinylbenzene) (PDVB-GO) in the removal of cesium ions from a synthetic aqueous solution. The experiments were performed in batch, and the influence of the contact time and the initial concentration of cesium ions were studied. Langmuir and Freundlich models as the equilibrium isotherms, and the kinetics of the adsorption process, pseudo-first order, pseudo-second order and intraparticle diffusion models, were evaluated GO and PDVB-GO, removed after 30 min. of contact time 80% and 63% of cesium ion, respectively for both adsorbents. The maximum adsorption capacities were 17 mg.g-1 for the GO and 15 mg.g-1 for the PDVB-GO. For both GO and PDVB-GO, Langmuir model fitted better in the adsorption process, the Gibbs Free Energy showed that this process for were spontaneous and the kinetic models were the pseudo-second order. As the polymer matrix, PDVB, has no significant removal capacity, the adsorption of the cesium ions by the PDVB-GO nanocomposite is due to the presence of the GO. On the other hand, the PDVB-GO was easily separated from the solution by decantation after the adsorption experiment. The results indicate the ability of the GO and the PDVB-GO nanocomposite to treat radioactive liquid wastes in order to minimize them. (author)
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Additional details
Additional titles
- Original title (Portuguese)
- Estudo da utilização do óxido de grafeno e do óxido de grafeno imobilizado em matriz de poli(divinilbenzeno) visando o tratamento de rejeito radioativo líquido contendo Césio-137
Publishing Information
- Imprint Pagination
- 99 p.
- Report number
- INIS-BR--22806
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 50071390
- Subject category
- S36: MATERIALS SCIENCE; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Resource subtype / Literary indicator
- Thesis
- Quality check status
- Yes
- Descriptors DEI
- ADSORPTION; AQUEOUS SOLUTIONS; CESIUM 137; CESIUM IONS; DIVINYLBENZENE; FOURIER TRANSFORMATION; FREE ENTHALPY; GRAPHENE; INFRARED SPECTROMETERS; LANGEVIN EQUATION; NANOCOMPOSITES; OXIDES; REMOVAL; SCANNING ELECTRON MICROSCOPY; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION;
- Descriptors DEC
- AROMATICS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON; CESIUM ISOTOPES; CHALCOGENIDES; CHARGED PARTICLES; CHEMICAL ANALYSIS; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; ELECTRON MICROSCOPY; ELEMENTS; ENERGY; EQUATIONS; GRAVIMETRIC ANALYSIS; HOMOGENEOUS MIXTURES; HYDROCARBONS; INTEGRAL TRANSFORMATIONS; INTERMEDIATE MASS NUCLEI; IONS; ISOTOPES; MATERIALS; MEASURING INSTRUMENTS; MICROSCOPY; MIXTURES; NANOMATERIALS; NONMETALS; NUCLEI; ODD-EVEN NUCLEI; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUANTITATIVE CHEMICAL ANALYSIS; RADIOISOTOPES; SCATTERING; SOLUTIONS; SORPTION; SPECTROMETERS; THERMAL ANALYSIS; THERMODYNAMIC PROPERTIES; TRANSFORMATIONS; YEARS LIVING RADIOISOTOPES;