StatusThe thesis was presented on the 28 November, 2022
Approved by NCAA on the 21 December, 2022
Abstract– 1.74 Mb / in romanian
– 1.70 Mb / in english
ThesisCZU 504.45.06(043.2) +579.22:546.3(043.2)
9.51 Mb /
Structure of the thesis: Annotation (English, Romanian, Russian), Introduction, Five Chapters, Conclusions and Recommendations, Bibliography of 506 titles, 66 figures, 45 tables, and 212 pages of basic texts. The results of the thesis were published in 50 papers, including 24 articles with impact factor, 2 books and 4 book chapters. Field of research: 145.01. Ecological Chemistry
The scope and objectives of the thesis: The main objective of the thesis is the analysis of the content of some chemical elements using neutron activation analysis in order to determine the biological value of the environment, to assess the risk on human health and state of ecological systems, as well as to develop the technology of metals removal from industrial effluents using different types of sorbents.
The novelty and scientific originality: For the first time in the Republic of Moldova neutron activation analysis was used to determine the content of elements in mosses, soils, fruits, vines, medicinal plants. The originality of the thesis consists in the simultaneous determination of a considerable number of chemical elements and estimation of the state the environment on the basis of these data. The technology of metal removal from mono- and multicomponent systems was proposed.
The obtained result, which contributes to the creation of the new scientific direction: Application of neutron activation analysis in estimation of the biological value of the habitat for life based on the determination of the elemental composition of the different environmental samples.
The theoretical importance of the work. A new theoretical and practical approach in the field of ecological chemistry has been proposed, which allow based on the chemical composition evaluation of the non-carcinogenic risk, calculation of hazard coefficient for air, soil, agricultural crops polluted with metals and the values of transfer factor in soil-agricultural crops systems. The optimal physico-chemical conditions for metals maximum removal using different types of biological sorbents have been established.
The applied value of the work. The inclusion of the results of the biomonitoring study of air pollution in the Republic of Moldova in the „European Atlas of Heavy Metal Atmospheric Deposition” edited by „ICP Vegetation Programme Coordination Center” indicate the value of ang high appreciation of the performed research. Determination of the elemental composition of fruits, wines, and medicinal plants is extremely important for the assessment of their quality and effect on the consumers’ health as well as identification of their origin. The results obtained for different sorbents can be used for the elaboration of the methods of metals removal with the purpose to reduce their concentration to maximum admissible levels.
The implementation of the results: The obtained results can be implemented in the training of the local producers of medicinal and aromatic plants, for analysis of the agricultural products and for the development of the new technique of metal removal using biological sorbents. The results were implemented at Public Institution “Central laboratory for testing alcoholic/non-alcoholic beverages and canned goods”, Moldovan Association of Aromatic and Medicinal Plant Producers "AROMEDA", Institute of Chemistry, and Institute of Microbiology and Biotechnology, Chisinau, Republic of Moldova.