Preparation and characterization of adsorbent based on carbon for pertechnetate adsorption

Rajec, P.; Galamboš, Michal; Daňo, Martin; Rosskopfová, O.; Čaplovičová, Mária; Hudec, Pavol; Horňáček, Michal; Novak, I. I.; Berek, Dušan

doi:10.1007/s10967-014-3303-y

Cited by 38 publications

(16 citation statements)

References 46 publications

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“…The adsorption study was carried out with NH 4 ReO 4 with a tracer of 99m TcO 4 -. Freundlich isotherms better correspond with experimental data as shown in our previous work [36]. FTIR spectra FTIR spectra are shown on Fig.…”

Section: Resultssupporting

confidence: 86%

“…Adsorption mechanism is not fully known and has been outlined in our previous work [36]. The pH values after the adsorption were almost the same in the range of pH 2-3, in which the adsorption took place with the highest K d values.…”

Section: Effect Of Competitive Anionsmentioning

confidence: 76%

“…Adsorption process in the case of sample D was slower and adsorption equilibrium was attained after 30 min reaching 80 %. The equilibrium time of 2 h was chosen for further experiments [36]. The adsorption study was carried out with NH 4 ReO 4 with a tracer of 99m TcO 4 -.…”

Section: Resultsmentioning

confidence: 99%

“…The AC samples A-E and SC were prepared by different treatment which was described in our previous work including their characterization [36].…”

Section: Methodsmentioning

confidence: 99%

“…The proposed general mechanism of attachment of the TcO 4 -to these functional groups ( Fig. 1) [35,36]. Our research interest is in the surface oxygen complex formation, chemistry of these complexes and their location in porosities, some of which may not be accessible to other anions to create such complex species.…”

Section: Introductionmentioning

confidence: 99%

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Effect of competing anions on pertechnetate adsorption by activated carbon

Galamboš

Daňo

Víglašová

et al. 2015

J Radioanal Nucl Chem

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Activated carbon (AC) has a relatively high efficiency for retaining TcO 4 -compared to other materials. AC is used on a vast scale in gas and water purification, metal extraction, medicine and many other applications. The TcO 4 -adsorption mechanism on AC is not fully known, however there are assumptions of ion-exchange reaction between AC surface and TcO 4 -anions. Adsorption and anion competitive investigation have shown that perchlorate anions have most influence on TcO 4 -adsorption. Adsorption properties depend on standard absolute molar enthalpies of hydration. Anion competitiveness was investigated with five samples that were prepared in different ways (this was already published in previous article), we used several anions Cl -, Br -, ClO 4 -, CH 3 COO -, NO 3 -, HCOO -and SO 4 2-at different concentrations. In general, the adsorption of TcO 4 -is influenced mostly by ClO 4 -, what is explained by its similar structure with TcO 4 -; however the co-existence of Fe 3? cations in the AC structure decreases TcO 4 -adsorption.

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Section: Resultssupporting

confidence: 86%

Section: Effect Of Competitive Anionsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

“…The AC samples A-E and SC were prepared by different treatment which was described in our previous work including their characterization [36].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%