[en] A new method for determination of sup(114m)In-EDTA in water was developed. This method consists in the decomposition of sup(114m)In-EDTA complex in the presence of ferric ion in an alkaline medium and in the co-precipitation of sup(114m)In(OH)₃ with Fe(OH)₃ and non-radioactive In(OH)₃ as a carrier. The activity of the precipitated deposit is determined by mixing it with a liquid gelling scintillator and then it is measured by means of scintillating spectrometer with low background. Prior to the preparation, the samples are purified from cations by means of a strongly acid cation exchanger. The minimum detectable concentration of sup(114m)In-EDTA in water is 5.7.10^-14 Ci/dm³ water sample. This value is better at least by an order of magnitude than the results obtained so far by other authors. The efficiency of measurement is 2.82 cpm per pCi at the natural background of about 35 cpm. The investigations were carried out from the viewpoint of using sup(114m)In-EDTA as a tracer for underground and surface waters. (author)

[en] A new tracer for watching for movement of underground or surface waters was developed together with a method for its measurement which is featured by a higher sensitivity than the methods known thus far, and allows the results to be very rapidly obtained. This is a complex compound In-EDTA traced with the radioactive isotope sup(114m)In. Its detectability is so high that the use of the tracer presents no problems for radiation protection. (author)

[en] The method of determination indium in form In-EDTA in mineralized water by neutron activation analysis was described. The Cf-252 neutron source was used. The different activation and determination techniques were applied, depending on mineralization of water. For low mineralized waters the samples were activated in form of water solutions and In-EDTA was separated on the anionite after activation. In the case of strongly mineralized water indium was separated before activation by co-precipitation of In(OH)₃ with Fe(OH)₃. The sensitivity of determination for 1 mg Cf-252 source was estimated at about 10^-9 g/g. (author)

[en] The article describes purification of radium containing water in coal mines. Author concludes that water purification is relatively simple and effective way to decrease environmental pollution caused by coal mining. The amount of radium disposed with type A radium water has been significantly decreased. The results of investigations show that it will be soon possible to purify also type B radium water. Article compares the amounts of radium disposed by coal mines in 1990, 1995 and forecast for 2000

[en] The methods of radon and its daughter products measurement have been discussed. The radiation protection rules and recommendation for minimization of health hazard for miners, control systems and the Polish regulations in this subject have been performed. The cumulative doses for miners in Polish mines have been also assessed. 54 refs, 7 figs, 3 tabs

[en] A new, very sensitive method for determination of sup(114m)InEDTA in water was developed. It consists in the decomposition of sup(114m)In³⁺EDTA complex in the acidic medium in the presence of Fe³⁺ ions and in coprecipitation of sup(114m)In(OH)₃ with nonradioactive In(OH)₃ as a carrier. The activity of precipitated deposit is determined by mixing it with a liquid gelling scintillator and then it is measured by means of scintillation spectrometer. The sensitivity of the measurement was as high as 1.27 counts per 1 disintegration of sup(114m)In. This enables to achieve the detection limit of sup(114m)In 18 mBq/dm³ for water samples of 1 cm³ volume. The method was carried out from the view point of using sup(114m)InEDTA as a tracer for undegraund and surface water. (author)

[en] The method enables the determination of ²¹⁰Pb in water samples or in aqueous solutions. Therefore, it can be also applied to determination of ²¹⁰Pb in biological and mineral samples after their solubilization. Using samples of 1 dm³ in volume and 30 minutes of counting, a detection limit of 20 Bq/m³ was achieved. The method consists of chemical separation of lead and radium isotopes making use of the different stability of EDTA complexes formed by Pb²⁺, Ba²⁺, and Ra²⁺. ²¹⁰Pb is coprecipitated with a Pb²⁺ carrier in the form of PbSO₄ and then mixed with a liquid scintillator and measured with low-background liquid scintillation spectrometer 'Quantulus'. The described method enables also a simultaneous determination of ²¹⁰Pb, ²²⁴Ra and ²²⁶Ra. (author) 3 tabs., 2 figs., 4 refs

No abstract available

[en] Natural waters with a high radium content occuring in underground workings of coal mines in Upper Silesia are described. Above 1500 water samples from carbonifereous aquifers were taken and the concentration of ²²⁶Ra was measured. In about 100 samples also uranium was determined. The ²²⁶Ra concentration varied in a wide range from 0.01 kBq/m³ to 270 kBq/m³, while the uranium content was usually much lower than one could expect from the equilibrium between radium and uranium. It was observed that the ²²⁶Ra concentration increases with mineralization of water, however the correlation was rather poor. Two types of radium-bearing waters were distinguished. Waters type A - containing Ba²⁺ ions and waters type B - containing SO₄^2- ions. Waters type A are always reach in radium and usually have higher concentration of ²²⁶Ra than waters type B. The described waters have one of the highest radium concentration which have been found so far in the natural environment. (author)

[en] Presented paper is continuation of previous work published on the Conference in Beijing, 1987. During two years observations of changes in radon concentration have been extended to different workings, including sandstone. The radon emission from long drainage boreholes was measured, and the results have been used for the estimation of degasification of boreholes impact. The most essential result is the real possibility to use this phenomenon, that is the changes in radon emission, to forecast outbursts in coal seams and as a means of warning in sandstones