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Pavel, Claudiu C.; Popa, Karin; Bilba, Nicolae; Cecal, Alexandru; Cozma, Danut Gabriel; Pui, Aurel

doi:10.1023/a:1026269217431

Cited by 38 publications

(13 citation statements)

References 9 publications

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“…This should be attributed to the exible porous framework, the higher affinity of the chalcogenide for the so Cs + and Sr 2+ ions and the excellent ion-exchange abilities of small organic amines. The equilibrium time is longer time than that at 65 C (5 minutes for Cs + and Sr 2+ ), but is still comparable to those of other ion-exchangers including the commercial UOP IONSIV IE-911 whose equilibrium time is more than 4 h. [62][63][64][65][66][67][68][69][70][71][72] The Cs + equilibrium curve is graphed in Fig. 33 The Cs + ion replaced the [Me 2 NH 2 ] + or [Me 3 NH] + cations immediately at the beginning and progressively a small fraction of [Me 2 NH 2 ] + or [Me 3 NH] + re-entered the interlayer spaces releasing some Cs + ion back to the solution.…”

Section: Kinetic and Isotherm Studies Of Ion Exchangementioning

confidence: 85%

A two-dimensionally microporous thiostannate with superior Cs⁺ and Sr²⁺ ion-exchange property

et al. 2015

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The removal of highly radioactive and long-lived 137 Cs + and 90 Sr 2+ from solution is of significance for radionuclide remediation. Herein we prepared a two-dimensionally microporous thiostannate, namely (Me 2 NH 2 ) 4/3 (Me 3 NH) 2/3 Sn 3 S 7 $1.25H 2 O (FJSM-SnS), and systematically investigated its Cs + and Sr 2+ ionexchange performance in different conditions. The structural stabilities and variation, ion-exchange kinetic and isothermal behavior, pH-dependent distribution coefficients (K d ), ion-exchange in simulated groundwater and ion-exchange applied to chromatography have been investigated. The results indicated that the maximum Cs + and Sr 2+ ion-exchange capacities of FJSM-SnS were 408.91 mg g À1 and 65.19 mg g À1 , respectively. In particular, FJSM-SnS showed quick ion-exchange ability and wide pH resistance (0.7-12.7) which make it outstanding among the ion-exchangers. An ion-exchange chromatographic column was firstly studied for chalcogenido ion-exchange materials, that is, a column filled with 3.0 g FJSM-SnS could remove 96-99% of Cs + ion and near 100% of Sr 2+ ion at low ionic concentrations in 900 bed volumes solutions. Furthermore, the title material could be synthesized on a large scale by a facile, one-pot and economical solvothermal method. The relatively low cost but remarkable ion-exchange performance makes it promising for radionuclide remediation. † Electronic supplementary information (ESI) available: Crystallographic data for FJSM-SnS and FJSM-SnS-Cs in CIF format, TG-MS spectra, mass spectra of solution and solvent, PXRD, EDS, the kinetics studies at room temperature, IR and table of data in the simulated groundwater, competitive ion-exchange experiments and the ion-exchange chromatographic column experiment. CCDC 1025383 and 1025384. For ESI and crystallographic data in CIF or other electronic format see

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Section: Kinetic and Isotherm Studies Of Ion Exchangementioning

confidence: 85%

A two-dimensionally microporous thiostannate with superior Cs⁺ and Sr²⁺ ion-exchange property

et al. 2015

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“…The utilization of radioactive isotopes to infer the uptake of a given element is already well known in the literature namely for Hg sorbents, nonetheless its usage does not make the most of radioactive trackers capabilities [17][18][19][20][21] . As a matter of fact, aspects such as the sensitivity, traceability and element specificity are not exploited in reported uptake studies using radioisotopes, where a more qualitative approach is favoured, underusing the radioisotopes characteristics [17][18][19][20][21] . This manuscript works as a proof of concept for the usage of radioactive trackers as a means of a very sensitive quantitative analysis of toxic metals uptake studies (Hg in particular).…”

Section: Advantages Of Radio-trackers For Hg Uptake Characterizationmentioning

confidence: 99%

Ultra sensitive quantification of Hg2+  sorption by functionalized nanoparticles using radioactive tracker spectroscopy

Amorim

Gonçalves

Tavares

et al. 2018

Microchemical Journal

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We present an ultra sensitive method to quantify the uptake of Hg by dithiocarbamate functionalized magnetic nanoparticles using radioactive tracker spectroscopy. We show a lower limit of detection of about 10fg L −1 , much lower than any other known techniques used to determine the uptake of Hg (about 10 4 more sensitive), without the need of digesting or processing the sorption agent. Such high sensitivity enables the characterization of Functionalized Nanoparticles as Hg sorbents in natural waters, where the low Hg concentration is very difficult to detect using current analytical methods such as absorption/fluorometry methods (namely Cold Vapour Atomic Absorption/fluorescence Spectroscopy). Radioactive Trackers also give the ability to track the sorbed element, allowing the reconstruction of the path made by the sorbed element during the uptake process, unveiling further information about the impact of toxic metals in the environment and living beings.

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“…This material can be used in many sectors thanks to its particular peculiarities. It has properties of ion exchange [27,28,29], adsorption [30,31,32,33,34,35], and also photocatalytic properties [36,37,38,39,40,41]. The coexistence of these properties makes these materials particularly and potentially interesting thanks to the possibility of creating a perfect synergy between them, which can be applied advantageously for the removal and degradation of common environmental pollutants such as polycyclic aromatic hydrocarbons, cycloalkanes, benzene, toluene, ethylbenzene, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation of ETS-10 Microporous Phase Pellets with Color Change Properties

Luca

Mastroianni

Siciliano

et al. 2019

Gels

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The main scope of the present work is to synthesize pH-responsive Engelhard titanium silicate (ETS)-10 phase crystalline pellets through the smart modification of a synthetic process which was previously applied to the preparation of other phases. The original preparative method, which envisages the use of the same initial synthesis as a binder for the preparation of pellets, was modified by adding an appropriate pH indicator to a number of systems subject to this investigation. It should be noted that the modified process was never before used to give access to pH-responsive ETS-10 phase pellets, and it is disclosed here for the first time. The study started from the definition of the best experimental conditions, which were optimized by analyzing the effects of temperature and system composition. The addition of the pH indicator did not alter the physicochemical characteristics and reactivity of the system. The pH-responsive ETS-10 phase crystalline pellets were characterized by an adequate mechanical strength and by a high capability to change color. The latter aspect can be particularly useful when this material is used in catalytic processes whose performance is strictly dependent on the pH value. The amount of gel used, as well as the working temperature, were the main critical parameters to be controlled during the preparation of pH-responsive ETS-10 phase crystalline pellets. The pellets were fully characterized by X-ray diffraction in order to investigate and identify the possible phases, and by using a hardness tester to measure the compressive strength. Finally, toning tests were performed.

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Untitled

Cited by 38 publications

References 9 publications

A two-dimensionally microporous thiostannate with superior Cs⁺ and Sr²⁺ ion-exchange property

A two-dimensionally microporous thiostannate with superior Cs⁺ and Sr²⁺ ion-exchange property

Ultra sensitive quantification of Hg2+  sorption by functionalized nanoparticles using radioactive tracker spectroscopy

Preparation of ETS-10 Microporous Phase Pellets with Color Change Properties

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Untitled

Cited by 38 publications

References 9 publications

A two-dimensionally microporous thiostannate with superior Cs+ and Sr2+ ion-exchange property

A two-dimensionally microporous thiostannate with superior Cs+ and Sr2+ ion-exchange property

Ultra sensitive quantification of Hg2+ sorption by functionalized nanoparticles using radioactive tracker spectroscopy

Preparation of ETS-10 Microporous Phase Pellets with Color Change Properties

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Product

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A two-dimensionally microporous thiostannate with superior Cs⁺ and Sr²⁺ ion-exchange property

A two-dimensionally microporous thiostannate with superior Cs⁺ and Sr²⁺ ion-exchange property

Ultra sensitive quantification of Hg2+  sorption by functionalized nanoparticles using radioactive tracker spectroscopy