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Dispersion of radon in the atmosphere around old uranium mill tailings

Molchanov O., Soroka Y., Podrezov A., Soroka M., Buzinny M., Pavlenko T.

Nukleonika

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2010

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Vol. 55, No. 4

535-538

EN

This paper presents the results of investigations of radon levels in the atmosphere around old uranium tailings aiming to estimate the influence of inactive uranium sites to the population and personnel. These tailings are situated in the area of a former uranium processing activity of a Pridniprovsk Chemical Plant in the city of Dniprodzierzhinsk. The radon-222 measurements have been carried out using an etched track system TRACK 2010Z. The minimum detectable activity of radon-222 has made up 2 Bq/m3 with the exposure of 30 days. Corresponding data sets of radon-222 and its daughters have been analysed. We have calculated distribution of the radon equilibrium factor (F), i.e. the ratio between radon and radon daughters for the investigated site. Our study shows a contrast spatial radon-222 dispersion in the atmosphere, while radon-222 is lowered to the background levels. The average value of the F makes up 0.146 for the undisturbed open atmosphere. Atmospheric inversions cause a significant rise of F that goes up to 0.487. The present research has been carried out within the frameworks of the STCU project no. 3290.

2

Otrzymywanie poliwinyloaminy przez degradację Hofmana poliakryloamidu

Soroka M., Stochaj A.

Prace Naukowe Instytutu Technologii Organicznej i Tworzyw Sztucznych Politechniki Wrocławskiej. Konferencje

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2003

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Vol. 52, nr 25

241-243

PL

Zbadano reakcję degradacji (przegrupowania) Hofmana poliakrylamidu i stwierdzono, że w przeciwieństwie do rozlicznych doniesień literaturowych poliakrylamid nie ulega degradacji do poliwinyloaminy. W reakcji poliakrylamidu z podchlorynem lub podbrominem sodu otrzymuje się nowy polimer zawierający fragment N, N' -dipodstawionego mocznika, który jest wyjątkowo odporny na hydrolizę kwaśną i alkaliczną.

EN

The reaction of polyacrylamide with sodium hypobromite or hypochlorite (the Hofmann degradation) has been reinvestigated. Contrary to the literature statements instead of polivinylamine the N-polyubstituted polyurea seems to be retracted. The manufacturing of polyvinylamine by Hofmann degradation of polyacrylamide seems to be wrong way, since its complex chemistry, low atomic yield and problems with isolation and purification of the final polymer. Since polymerization of N-vinylamides has also most of the same problems, the preparation of PVA is still awaiting for its prophet.

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Application of Silicon-Phosphorus Based Reagents in Synthesis of Aminophosphonates. Part 2: Reactions of N-(Triphenylmethyl-aldimines with the Silylated Phosphorus Acid Esters

Boduszek B., Soroka M.

Polish Journal of Chemistry

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2002

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Vol. 76 / nr 8

1105-1111

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Samouczek BHP w laboratorium chemii organicznej

Soroka M.

LAB Laboratoria, Aparatura, Badania

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2002

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R. 7, nr 3

24-31