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Factors influencing the increased 90 Sr radioisotope migration in highly alkaline groundwater at Chornobyl NPP site.

التفاصيل البيبلوغرافية
العنوان: Factors influencing the increased 90 Sr radioisotope migration in highly alkaline groundwater at Chornobyl NPP site.
المؤلفون: Kovalenko IO; Institute for Safety Problems of Nuclear Power Plants National Academy of Sciences of Ukraine, Kirova str 36a, Chornobyl, 07270, Ukraine. Electronic address: maddoc01001@gmail.com., Panasiuk MI; Institute for Safety Problems of Nuclear Power Plants National Academy of Sciences of Ukraine, Kirova str 36a, Chornobyl, 07270, Ukraine. Electronic address: nipanasyuk53@gmail.com., Sosonna NV; Institute for Safety Problems of Nuclear Power Plants National Academy of Sciences of Ukraine, Kirova str 36a, Chornobyl, 07270, Ukraine. Electronic address: natalyasosonnaya@gmail.com., Khan VE; Institute for Safety Problems of Nuclear Power Plants National Academy of Sciences of Ukraine, Kirova str 36a, Chornobyl, 07270, Ukraine. Electronic address: v.khan@ispnpp.kiev.ua., Buzynnyi MG; SI «O.M. Marzieiev Institute for Public Health», NAMSU, 50 Popudrenko Street, Kyiv, 02094, Ukraine. Electronic address: michael.buzinny@gmail.com., Koliabina ІL; Institute of Geological Science of Ukraine National Science Academy, 54 Volodymyrska Street, Kyiv, 01030, Ukraine. Electronic address: kolira_igns@i.ua., Оnyshchenko IP; Institute of Geological Science of Ukraine National Science Academy, 54 Volodymyrska Street, Kyiv, 01030, Ukraine. Electronic address: iony@meta.ua.
المصدر: Journal of environmental radioactivity [J Environ Radioact] 2024 May; Vol. 275, pp. 107431. Date of Electronic Publication: 2024 Apr 15.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Applied Science Publishers Country of Publication: England NLM ID: 8508119 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1700 (Electronic) Linking ISSN: 0265931X NLM ISO Abbreviation: J Environ Radioact Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Barking, Essex : Elsevier Applied Science Publishers,
مواضيع طبية MeSH: Strontium Radioisotopes*/analysis , Groundwater*/chemistry , Water Pollutants, Radioactive*/analysis , Chernobyl Nuclear Accident* , Radiation Monitoring*, Ukraine ; Soil Pollutants, Radioactive/analysis
مستخلص: This paper analyses the formation of high Sr 2+ concentration in strong alkaline (pH = 9.5-12.5) groundwater using data of the 27 years of observations around the destroyed Chernobyl NPP Unit 4. It appears that the formation of strong alkaline groundwater in different monitoring wells is consistent with the distribution of 90 Sr, pH and main ions. The reason for the increase in 90 Sr concentrations is the process of its migration from the sources of contamination - leaks of highly active water localized in certain premises inside the «Shelter » object. These computational experiments showed that for the groundwater in pH range 9.5-12.4, the concentration of strontium in the form of SrOH  +  increases and in the form of Sr 2+ - decreases. In addition, the fraction of 90 Sr in the form of a soluble neutral complex compound SrCO 3 0 , which is not sorbed, reaches 14-35%. Increased fractions of 90 Sr in forms of SrOH + and SrCO 3 are factors which reduce the isotope ability to be sorbed by soils and therefore increase its migration ability. In strongly alkaline groundwater a sharp increase in 90 Sr volumetric activity may also be caused by ionic strength (IS) increase above 5 mmol/L. Thus, the factors that influence the increase in 90 Sr volumetric activity in strongly alkaline groundwater are the formation of its complex compounds and an increase in ionic strength (IS), which reduces the thickness of the double electric layer and, as a result, reduces the sorption capacity of soils.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
فهرسة مساهمة: Keywords: Ca(2+); ChNPP industrial site; Groundwater; Ionic strength; K(+); Migration of (90)Sr; Migration of (90)Sr in the forms of SrCO(3) and SrOH(+); Na(+); Strongly alkaline environment; Thermodynamical modelling
المشرفين على المادة: 0 (Strontium Radioisotopes)
0 (Water Pollutants, Radioactive)
5TZZ77Z4ER (Strontium-90)
0 (Soil Pollutants, Radioactive)
تواريخ الأحداث: Date Created: 20240416 Date Completed: 20240424 Latest Revision: 20240424
رمز التحديث: 20240425
DOI: 10.1016/j.jenvrad.2024.107431
PMID: 38626658
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-1700
DOI:10.1016/j.jenvrad.2024.107431