Ecological and Geochemical Assessment of the Chemical Composition of Drinking Waters of Bryansk Oblast with Application to Increased Risk of Thyroid Gland Diseases
| Autor: | I. N. Gromyak, V. N. Danilova, N. V. Korsakova, Lyudmila Kolmykova, Elena Korobova |
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| Rok vydání: | 2020 |
| Předmět: |
Ecology
business.industry 020209 energy Thyroid Water supply 02 engineering and technology Contamination 010502 geochemistry & geophysics Chernobyl Nuclear Accident 01 natural sciences Geophysics Increased risk medicine.anatomical_structure Geochemistry and Petrology 0202 electrical engineering electronic engineering information engineering medicine Formation water Environmental science business Chemical composition Groundwater 0105 earth and related environmental sciences |
| Zdroj: | Geochemistry International. 58:66-76 |
| ISSN: | 1556-1968 0016-7029 |
| Popis: | Combined ecological and geochemical assessment was performed for the major- and trace-element composition of groundwater of Bryansk oblast used for drinking water supply, and settlements and districts were ranked with respect to the contents of I, Se, and some other chemical elements and their concentrations were compared with the existing hygienic standards. It was shown that the I and Se contents of drinking water is controlled by the geochemical conditions of water formation and do not reach physiological optimum levels (10 mg/L for I and 2.5–3.3 mg/L for Se) in most districts of the oblast, which could intensify the adverse response of the thyroid gland (TG) to the contamination of the region with I-131 during the Chernobyl nuclear accident of 1986. Furthermore, we revealed other unfavorable hydrochemical factors, which may influence the distribution of natural endemic diseases among local inhabitants related to local elevated concentrations of Mn (up to 10 MPC), Fe (up to 26 MPC), Si, and Sr (up to 2 MPC) in drinking waters confined to certain hydrogeologic complexes. |
| Databáze: | OpenAIRE |
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