1,720,966 research outputs found
Stratigraphic radiochemical analysis of short-core sediments from Portovesme (Sardinia) as a record of environmental pollution
No full textCorrelation between trace metal concentrations in sediments and in the mussel Mytilus Galloprovincialis
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Santa Gilla lagoon (Italy): a mercury sediment pollution case study. Contamination assessment and restoration of the site
No full textFallout distribution in Padua and Northeast Italy after the chernobyl nuclear reactor accident
No full textThe radioactive cloud from the Chernobyl nuclear reactor accident arrived in northeast Italy on 30 April 1986. Ground-level air activities detected in Padua reached maximum values of 28·6, 19·2, 3·3, 1·7 and 7·5 Bq m-3 for 131I, 132Te(132I), 137Cs and 103Ru, respectively, on 1 May; about 10 days later, the activities had fallen to less than 1% of peak values. Considerations of cloud homogeneity are reported. The distribution of fallout radionuclides in Padua was evaluated on the basis of radioactivity detected on natural surfaces. The average committed dose equivalent to the thyroid for adult people in Padua through 131I inhalation was estimated at 0·37 mSv. Soil activity was monitored daily in samples collected in Padua during the first weeks of May 1986. Fallout deposition over northeast Italy was measured on 75 surface soil samples collected during June 1986 and long-lived radionuclide distribution maps were derived. © 1988
The deposition of chernobyl fallout in North-east Italy
No full textSince April 29th 1986 air radioactivity measurements at ground level in relation to the Chernobyl accident, were performed in our Institute by high resolution gamma-ray spectrometry. Airborne dust samples were collected on 0.45 pm filters, with controlled flow samplers, on a 4 h time basis until May 1st. Afterwards, samples were collected on a daily basis. The maximum air radioactivity was observed on May 1st when the following average
values (mBq mp3) were detected: 131I = 15 577; 132I (132Te) = 10 550; 103Ru = 4070; 137Cs = 1783; 134Cs = 929; 106Ru=1100; 99mTc=969; 140Ba=944; 140La = 548
The use of 210Pb and 137Cs in the study of sediment pollution in the Lagoon of Venice
No full textThe activity of 137Cs per unit area in sediments of the central part of the Lagoon of Venice was determined with the aim of identifying boundaries of homogeneous depositional zones. the 210Pb dating technique was used to date vertical profiles of cores from the same area. A comparison of the total amounts of 137Cs and non-supported 210Pb present in each core and the atmospheric input allows us to identify different depositional areas inside the basin and to outline the possible drainage effect of industrial solid wastes used in past reclaiming operations. © 1988
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