Thorium removal from weakly acidic solutions using titan yellow-impregnated XAD-7 resin beads: kinetics, equilibrium and thermodynamic studies

Hosseini-Bandegharaei, Ahmad; Allahabadi, Ahmad; Rahmani-Sani, Abolfazl; Rastegar, Ayoob; Khamirchi, Ramzanali; Mehrpouyan, Mohammad; Hekmatshoar, Reza; Pajohankia, Zahra

doi:10.1007/s10967-015-4689-x

Cited by 17 publications

(9 citation statements)

References 59 publications

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“…The maximum adsorption capacities found in the present case, although below that observed for polymeric resins (appx. 300 mg g -1 ) [27], are higher than those demonstrated by modified carbon nanotubes (13 mg g -In this study, the method of preparation of microporous composite SiO2-TiO2 spherical particles with apparent surface area value of 500 m 2 •g -1 has been demonstrated. The composite silica-titania material is able to retain its high apparent SSA and micropore volume up to calcination temperature of 400 °C.…”

Section: Lead Adsorption On Tio2 and Sio2-tio2mentioning

confidence: 72%

“…Water-soluble lead(II) acetate and volatile tetraethyl lead, often encountered in industry, are extremely harmful to humans and environment. Microporous TiO2 and SiO2-TiO2 metal oxides demonstrate higher efficiency in lead uptake from water solutions than the widespread organic polymeric resins [27] or carbon-based adsorbents [28], moreover, their superior chemical and thermal stability make them more promising for long-term application.…”

Section: Introductionmentioning

confidence: 99%

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Microporous composite SiO2-TiO2 spheres prepared via the peroxo route: Lead(II) removal in aqueous media

Morozov

Krivtsov

Авдин

et al. 2018

Journal of Non-Crystalline Solids

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Composite microporous SiO2-TiO2 spheres and micro/mesoporous TiO2 spheres were prepared via the template-free two-step synthetic route using aqueous peroxotitanate solution and tetraethyl orthtosilicate (TEOS) as precursors. Both the composite SiO2-TiO2 and pure TiO2 spheres prepared by the solventexchange method were initially non-porous, but the applied reflux treatment in water-ethanol suspension successfully transformed them into microporous materials with high apparent surface areas approaching 500 m 2 •g-1 and the micropore volume of 0.17 cm 3 •g-1 , while maintaining the same morphology. The prepared composites retained high values of pore volume and specific surface area up to 400 ºC of thermal treatment temperature. The crystallization of TiO2 into the anatase phase in the mixed oxide occurred only at 700 ºC, that process was also accompanied by the significant reduction of pore volume, as well as apparent surface area values. Both synthesized composite oxides and pure titania were tested, in aqueous media, on the lead(II) removal; they demonstrated high adsorption capacities, reaching 340 mg(Pb 2+)•g-1. Moreover, the mixed silica-titania oxide was found to be more efficient adsorbent at low pH values.

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Section: Lead Adsorption On Tio2 and Sio2-tio2mentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Microporous composite SiO2-TiO2 spheres prepared via the peroxo route: Lead(II) removal in aqueous media

Morozov

Krivtsov

Авдин

et al. 2018

Journal of Non-Crystalline Solids

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“…There are several descriptions of the use of polymeric resins on columns for removal of radionuclides in literature with scopes ranging from drinking water purification to production of radionuclide raw materials to be used in pharmaceutical preparations [255][256][257][258].…”

Section: Selected Methods For Column Separation and Purification Of Tmentioning

confidence: 99%

Development of separation technology for the removal of radium-223 from decayed thorium-227 in drug formulations. Material screening and method development

Frenvik

Kristensen

Ryan

2015

Drug Development and Industrial Pharmacy

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Targeted thorium conjugates are currently being investigated as a new class of alpha-radiopharmaceuticals. The natural decay of thorium-227 ((227)Th) results in the ingrowth of radium-223 ((223)Ra). Consideration must, therefore, be given to define acceptable limits of (223)Ra in the drug product at the time of dose administration. By effective sequestration of (223)Ra, we aim to improve the radiochemical purity and extend the effective user window of drug products containing (227)Th. (223)Ra is the first progeny of (227)Th and the only one with a long half-life (days). We have, therefore, focused on the removal of this specific species since the progenies of (223)Ra will have a very limited lifetime in the formulation once (223)Ra is removed. In this study, we investigated a multitude of materials for their ability to reduce the (223)Ra level by: (1) passive diffusion or (2) by cartridge filtration on gravity columns. In addition, we probe the compatibility of these materials in the presence of antibody trastuzumab to assess the level of protein binding and estimate the quenching of radiolysis by binding of radionuclides. A screening matrix of organic and inorganic materials was established, i.e. strontium and calcium alginate gel beads, distearoyl phosphatidylglycerol (DSPG) liposomes, ceramic hydroxyapatite, Zeolite UOP type 4A and cation exchange resins AG50W-X8 and SOURCE 30S. First, passive diffusional uptake of (223)Ra by suspended materials present in the formulation was measured as a decrease in sample radioactivity after separation. Second, selected materials were packed on gravity columns in order to evaluate the efficiency of column separation versus diffusional adsorption. The retention of (223)Ra and (227)Th were characterized by measuring the radioactivity in the eluate and on the columns. Finally, the compatibility between trastuzumab, as a selected model antibody, and suspensions of the binding materials was analyzed during storage of the drug product in the presence of adsorbent. The formation of H2O2 was evaluated to measure the influence of radionuclide binding material on radiolysis in the formulation. All the materials bound (223)Ra by passive diffusional uptake ranging from 31% to 95% with DSPG liposomes demonstrating superiority at 95% efficiency. All materials suitable for assessment by gravity column filtration bound (223)Ra almost quantitatively (∼100%) and with minimal variation (relative standard deviation <1%). The uptake was significantly higher compared to passive diffusional uptake. Alginate gel beads, ceramic hydroxyapatite and SOURCE 30S reduced the antibody concentration in solution to 40-50% while the Zeolite UOP type 4A, AG50W-X8 resin and DSPG liposomes showed ≤10% reduction of antibody concentration. Ceramic hydroxyapatite significantly reduced H2O2 formed by radionuclide initiated radiolysis.

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“…Freundlich and Langmuir models were applied for fitting with the experimental data. The basis of Langmuir model is that the energy of adsorption is stable and the process of adsorption happens on homogeneous surfaces via monolayer adsorption [52,53]. The linear equation of Langmuir model can be presented as below:…”

Section: Isotherms Of Phenol Adsorptionmentioning

confidence: 99%

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Jafari¹,

Alahabadi²,

Saghi³

et al. 2019

Desalination and Water Treatment

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Phenol can cause environmental problems due to low biological degradation, high toxicity and long persistence in the environment. Thus, the removal of phenol and its derivatives from water is of great importance. Application of agricultural waste materials has been intensively investigated for many years for adsorptive removal of active pollutants. The objective of this research was to improve the adsorption capacity of rice husk ash by activation with different chemical agents for removing phenol from aqueous solutions. Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller (BET), and field emission electron scanning microscopy techniques were used for characterization, and the modified rice ash husk was compared with the conventional one. Results indicated that the effect of chemical treatment by NH 4 Cl was better than the other tested chemical agents. The BET specific surface area of NH 4 Cl-activated rice husk ash (ARHA) was 543 m 2 /g, and the average pore diameter was 3.24 nm. The isotherm and kinetic studies of phenol removal by ARHA showed that the Langmuir model and the pseudo-second-order equation represented the best fit with the adsorption data. The maximum adsorption capacity of phenol onto the newly activated rice husk ash was obtained from the Langmuir isotherm model, which was 66 mg/g.

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Thorium removal from weakly acidic solutions using titan yellow-impregnated XAD-7 resin beads: kinetics, equilibrium and thermodynamic studies

Cited by 17 publications

References 59 publications

Microporous composite SiO2-TiO2 spheres prepared via the peroxo route: Lead(II) removal in aqueous media

Microporous composite SiO2-TiO2 spheres prepared via the peroxo route: Lead(II) removal in aqueous media

Development of separation technology for the removal of radium-223 from decayed thorium-227 in drug formulations. Material screening and method development

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

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