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SUMMARY:Technogenic Fallout of Uranium and Thorium in Novosibirsk vicinity
  (Russia\, West Siberia)
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20260520T040156Z
UID:indico-contribution-1209@indico.inp.nsk.su
DESCRIPTION:Speakers: Svetlana Artamonova (IGM SB RAS)\nThe article is dev
 oted to the problem of technogenic pollution of environment: the results o
 f the mineralogical and geochemical investigation of suspension content of
  melted snow and soils samples of Novosibirsk vicinity are considered.  Co
 ntent of U\, Th and heavy metals were determined by means of X-ray fluores
 cence elemental analysis with synchrotron radiation (SR-XRF) method. For t
 he 235U and 238U isotope analysis is used mass-spectrometry with inductive
 ly coupled plasma (ICP-MS) method. Mineral formations of aerosol particles
  were studied with scanning electron microscopy.\nPreviously shown that th
 e V\, Mn\, I\, Ga are the main geochemical indicators of emission of Novos
 ibirsk heat and electric power plants (HEPP -2\, -3\, -5) [Artamonova\, 20
 11]. But the Th and U is revealed to be the geochemical indicators of HEPP
  emission too. Brown coal of Kuzbas and Kansk-Achinsk coal basin are used 
 as firewood of Novosibirsk TETs. Coal of these deposit basin is known to b
 e enriched by heavy metals and natural radionuclides during their geologic
 al origin time. So\, Th and U are significant in technogenic fallout of vi
 cinity. This fact is confirmed by studies results: U and Th content in aer
 osols and soil of HEPP vicinity are a few times greater than in pure backg
 round cite.   \nThe second source of U fallout are the emissions of the No
 ¬vosibirsk Chemical Concentrates Plant (NCCP) of Rosatom State Nuclear En
 ergy Corporation. Namely the isotope 238U/235U ratio is used as the main i
 ndicator of NCCP aerosol pollution. The maximal distance of NCCP emission 
 plume is revealed to arrive by 70 km\, where 238U/235U ratio of aerosol is
  132.1  3.3. The 238U/235U increases up to about natural ratio 138.4 at
  110 km far from NCCP emission northern east plume only. In the NCCP vicin
 ity the particles of uranium oxides in technogenic aerosol were establishe
 d by means of scanning electron microscopy.\nThus the U\, Th technogenic p
 ollution of Novosibirsk vicinity is revealed. The ecological situation may
  be developed by heat and electric power plant modernization\, by gaseous 
 will stand the dominating firewood of Novosibirsk HEPP. The elemental SR-X
 RF analysis of snow precipitation and soil can be used to carry out a time
 ly and reliable environmental assessment of an urban territory. \nThe work
  was supported by the Russian Foundation for Basic Research under project 
 No. 14-05-00289.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1209/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1209/
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