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1

Dictyonema black shale and Triassic sandstones as potential sources of uranium

Kiegiel K., Zakrzewska-Kołtuniewicz G., Gajda D., Miśkiewicz A., Abramowska A., Biełuszka P., Danko B., Chajduk E., Wołkowicz S.

Nukleonika

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2015

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Vol. 60, No. 3, part 2

515--522

EN

The main objective of the present study was an assessment of the possibility of uranium recovery from domestic resources in Poland. In the fi rst stage uranium was leached from the ground uranium ore by using acidic (sulfuric acid or hydrochloric acid) or alkaline (carbonate) solutions. The leaching efficiencies of uranium were dependent on the type of ore and it reached 81% for Dictyonemic shales and almost 100% for sandstones. The novel leaching routes, with the application of the helical membrane contactor equipped with rotating part were tested. The obtained postleaching solutions were concentrated and purifi ed using solvent extraction or ion exchange chromatography. New methods of solvent extraction, as well as hybrid processes for separation and purifi cation of the product, were studied. Extraction with the use of membrane capillary contactors that has many advantages above conventional methods was also proposed as an alternative purification method. The fi nal product U3O8 could be obtained by the precipitation of ‘yellow cake’, followed by calcination step. The results of precipitation of ammonium diuranate and uranium peroxide from diluted uranium solution were presented.

2

Separation of 1,3-Propanediol from Aqueous Solutions by Ion Exchange Chromatography

Rukowicz B., Miesiąc I., Alejski K.

Polish Journal of Chemical Technology

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2014

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Vol. 16, nr 2

82--86

EN

1,3-propanediol is a promising monomer with many applications and can be produced by bioconversion of renewable resources. The separation of this product from fermentation broth is a difficult task. In this work, the application of cation exchange resin for the separation of 1,3-propanediol from model aqueous solution was examined. The best effect of separation of 1,3-propanediol from glycerol using sorption method was obtained for H+ resin form, although the observed partition coefficient of 1,3-propanediol was low. On the basis of the results of the sorption of 1,3-propanediol, the ionic forms of the resin were selected and used in the next experiments (H+, Ca2+, Ag+, Na+, Pb2+, Zn2+). The best results in ion exchange chromatography were obtained for cation exchange resin in H+ and Ca2+ form. The use of smaller particle size of resin and a longer length of the column allows to obtain better separation of mixtures.

3

Routine simultaneous production of no-carrier-added high purity 64Cu and 67Ga

Al Rayyes A. H., Ailouti Y.

Nukleonika

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2011

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Vol. 56, No. 4

259-262

EN

A routine production method of no-carrier-added 64Cu was performed. A copper target support is electroplated by gold then an optimized thickness of enriched 68Zn layer is deposited. The 68Zn target was bombarded with a 23.5 MeV and 250 miA proton beam, generating the main nuclear reactions 68Zn(p,2n)67Ga and 68Zn(p,alfa n)64Cu. A semi-automated separation method using a chromatographic column system was developed for 64CuCl2 production. A 600 mCi batch of 64Cu is produced at the end of separation and purification chemistry. The radionuclidic purity of 64Cu was less than 98% as required by the United States and European Pharmacopoeias. Radiochemical purity and activity concentration is suitable for labeling different ligands to produce diagnostic and therapeutic radiopharmaceuticals.

4

Analiza specjacyjna Cr(lll) i Cr(VI) w wodzie. Cz. III - możliwości i problemy rozdzielania form specjacyjnych chromu wysoko sprawną chromatografią cieczową

Walkowiak G., Sęk K., Barałkiewicz D.

Analityka : nauka i praktyka

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2010

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nr 2

32-35

PL

Formy specjacyjne chromu można rozdzielać i oznaczać na wiele sposobów. Wśród metod rozdzielania najpowszechniej stosowana jest wysoko sprawna chromatografia cieczowa HPLC, ze względu na dostępność różnorodnych mechanizmów rozdzielania oraz faz ruchomych, pozwalających na zachowanie oznaczanej formy w stanach niezmienionych.

5

Zastosowanie technik separacyjnych w analityce cieczy jonowych

Stepnowski P., Nichthauser J.

LAB Laboratoria, Aparatura, Badania

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2008

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R. 13, nr 3

6-13

6

Production and separation of manganese-54 from alpha-irradiated V2O5 target

Kłos M., Bartyzel M., Petelenz B.

Nukleonika

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2006

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Vol. 51, nr 4

221-224

EN

Our aim was to obtain and isolate the carrier-free gamma emitter, 54Mn. Manganese-54 was produced via cyclotron activation in the 51V(alfa,n)54Mn reaction, and separated from HCl solution on Dowex-50 . 8 resin. The effectiveness of chemical separation was checked using the internal tracer 48V, produced in a cyclotron via the natTi(p,xn)48V reaction. The microcomponent 54Mn was eluted from the column with 3 M HCl, and vanadium with a 0.1 M HCl/ethanol/H2O2 mixture. The pair Ti/48V was separated on Dowex-50 . 8, using 0.03 M HClO4 as the eluent for 48V and 1 M HClO4 for natTi. The carrier-free 54Mn was of 99.9% radionuclide purity. In separation of the carrierfree pair 54Mn/48V, the recovery yield was 98.7% for 54Mn and 96.4% for 48V.

7

Isotope effects of gallium and indium in cation exchange chromatography

Dembiński W., Herdzik I., Skwara W., Bulska E., Wysocka A.

Nukleonika

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2006

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Vol. 51, nr 4

217-220

EN

The isotope effects of gallium (69/71Ga) and indium (113/115In) have been determined in the system: strong cation exchanger (Dowex 50-X8)/HCl. The sings of gallium and indium effects were opposite, i.e., the heavier isotope of gallium was fractionated into the resin phase, while the heavy isotope of indium was fractionated into the liquid phase. The values of unit separation gains were found to be +3.0 ´ 10-5 for gallium and –2.0 ´ 10-4 for indium. A possible explanation of the effects is proposed.

8

On the use of solid-phase extraction for the fractionation of aluminium species

Ruszczyńska A., Pyrzyńska K., Bulska E.

Chemia Analityczna

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2004

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Vol. 49, No. 1

19-28

EN

In this work, the attempt was made to use the micro-column with ion-exchange resins for the fractionation of aluminium species. The tea infusion was used as a study sample. The total content of aluminium in black tea leaves determined by graphite furnace atomic absorption spectrometry was found to be around 1.2 mg g-1 and close to 35% was extracted into the warm water. The performance of cation exchange resin Dowex HCR-S, chelating resin Chelex 100 and anion exchange resin AG MP 1 for the aluminium fractionation were investigated. It was demonstrated that in black tea infusion more then 60% of total amount of extracted aluminium were present in the form of organic complexes.

PL

W pracy zaproponowano zastosowanie żywic jonowymiennych do frakcjonowania form glinu w czystych roztworach wzorcowych lub w obecności taniny. Opracowana metoda została zastosowana do badania specjacji glinu w naparze herbaty. W celu oznaczenia całkowitej zaxvartosci glinu w badanych próbkach wykorzystano metodę atomowej spektrometrii absorpcyjnej z atomizacjąw piecu grafitowym. Stwierdzono, że zawartość glinu w liściach z czarnej herbaty wynosi około 1.2 mg g(1) i około 3 5% tej ilości zostaje wymyta do naparu w trakcie standardowego parzenia napoju. W celu określenia w jakich formach może występować glin w badanych roztworach wykorzystano trzy sorbenty: chelatujący Chelex i 00, kationowymienny Dowex HCR-S i anionowymienny AG MP l. Na podstawie zawartości glinu w poszczególnych frakcjach oszacowano, że w napoju czarnej herbaty około 60% wszystkich form glinu stanowią związki organiczne.

9

Wykorzystanie chromatografii jonowymiennej do izolowania białek

Wójcik M., Koziołkiewicz M.

Analityka : nauka i praktyka

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2004

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nr 3

4-9

PL

Chromatografia jonowymienna należy do powszechnie stosowanych niedenaturujących metod chromatograficznych, które zapewniają uzyskanie czystego preparatu białka, z zachowaniem jego aktywności biologicznej.

10

High pure, carrier free 85Sr and 83Rb tracers obtained with AIC-144 cyclotron

Misiak R., Gaca P., Bartyzel M., Mietelski J.

Nukleonika

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2003

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Vol. 48, nr 3

151--153

EN

The method of obtaining carrier free tracers, 85Sr and 83Rb from proton-irradiated natRbCl target is described. The separation of the radionuclides was done using Sr-Resin, the resin based on a crown ether. Current and some other possible applications of the tracers are discussed.

11

Determination of glyphosate in water samples with the combination of cation-exchange chromatography and capillary electrophoresis

Khrolenko M., Dżygiel P., Wieczorek P.

Ars Separatoria Acta

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2003

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No. 2

56-63

EN

An analytical method for determination of pesticide Glyphosate in water as a combination of cation-exchange chromatography and capillary electrophoresis is presented. Pure water was spiked with Glyphosate at concentrations 0.1, 0.25, 0.5 and 1 mM and percolated through a strong cation-exchange column packed with Dowex 50WX4-400 resin in its H+ form. The extract was further analyzed by capillary electrophoresis in indirect detection mode. The calibration curve for the pesticide in the range 0.1–2.5 mM was linear and with high degree of reproducibility. The obtained recoveries for all the studied concentrations amount 85%. Afterwards, the possibility to determine Glyphosate at the concentration 0.001mM (0.17 µg/ml) was checked by percolation of 100 ml of water sample through a column. The calculated recovery was 97.7%

12

Ion exchange separation of scandium and its estimation in geological materials by flame atomic emission spectrometry

Bangroo P. N., Selina M., Arora H. C.

Chemia Analityczna

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2000

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Vol. 45, No. 6

887-891

EN

A method for the estimation of scandium present in silicate materials and in samples containing up to 10% Nb2O5 + Ta2O5 by flame atomic emission spectrometry has been developed. Scandium is separated from iron, yttrium and lanthanides by ion exchange chromatography using cation exchange resin Amberlite IR 120 and a mixture of 0.3 mol (-1) (NH4)2SO4 and 0.025 mol 1-1 H2SO4. In samples containing high content of iron or niobium and tantalum, separation with ammonium tartrate is carried out prior to ion exchange. The limit of determination for scandium is 0.2 ug ml-1 in the final solution. The method is precise with a RSD of 5.6% and a recovery of more than 93.7%.

PL

Opracowano metodę oznaczania skandu w krzemianach i w próbkach zawierających do 10% Nb(2)O(5) + Ta(2)O(5) za pomocą emisyjnej spektrometrii atomowej. Skand oddzielano od żelaza, itru i lantanowców metodą chromatografii jonowymiennej, stosując kationit Amberlit IR 120 oraz mieszaninę 0.3 mol 1(-1) (NH4)2SO4 i 0.025 mol 11 H2SO4. Próbki o dużej zawartości żelaza lub niobu i tantalu, poddawano rozdziałowi za pomocą winianu amonu, przed chromatografią jonowymienną. Granica oznaczalności dla skandu wynosi 0.2 ug ml-1 roztworu nanoszonego na kolumnę. Metoda jest precyzyjna, RSD wynosi 5.6%, a odzysk ponad 93.7%.