Migration of macro- and microelements in the ecosystems of the Dniester river
Închide
Articolul precedent
Articolul urmator
645 11
Ultima descărcare din IBN:
2024-02-16 14:37
SM ISO690:2012
ZUBCOV, Elena, BILEŢCHI, Lucia, CIORNEA, Victor, ZUBCOV, Natalia, BAGRIN, Nina. Migration of macro- and microelements in the ecosystems of the Dniester river. In: Ecological and environmental chemistry : - 2017, Ed. 6, 2-3 martie 2017, Chișinău. Chisinau, Republic of Moldova: Academy of Sciences of Moldova, 2017, Ediția 6, p. 78.
EXPORT metadate:
Google Scholar
Crossref
CERIF

DataCite
Dublin Core
Ecological and environmental chemistry
Ediția 6, 2017
Conferința "Ecological and environmental chemistry 2017"
6, Chișinău, Moldova, 2-3 martie 2017

Migration of macro- and microelements in the ecosystems of the Dniester river


Pag. 78-78

Zubcov Elena, Bileţchi Lucia, Ciornea Victor, Zubcov Natalia, Bagrin Nina
 
Institute of Zoology ASM
 
Disponibil în IBN: 8 martie 2019


Rezumat

The dynamics of micro- and microelements (As, Al, B, Ba, Be, Bi, Hg, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, Pb, Se, Sr, V, Zn, etc.) was analysed in the waters of the Dniester River, Dubasari and Cuciurgan reservoirs. For a range of alkaline and alkaline-earth elements (Al, B, Ba, K, Li, Mg, Na, Sr) there was recorded an obvious increase of their content along the Dniester River due to both natural and anthropic factors. Of a high concern is the fact that the microelements, which are included by the World Health Organization in the list of the most dangerous toxic substances, as As, Bi, Cd, Pb, were registered in investigated waters in almost 100% of cases. The highest concentrations of toxic elements were observed in Cuciurgan reservoir. The metals, as metalloids (As) and some nonmetals (Se), are a numerous group of chemical elements, which have a significant biochemical role in the functioning of aquatic ecosystems, their influence on live systems being often similar to that of catalysts in chemical reactions. In the case of a large number of elements, as Cu, Zn, Mn, Pb, Cd, Ni, Mo, V, Co, Pb, Ni, Se, the regularities of accumulation in the aquatic plants and animals, including fish were determined. Such investigations allow assessing both the functional role of hydrobionts in the biogenic migration of metals and the role of chemical elements in the development of aquatic organisms. They form the scientific ground for the determination of support capacity of aquatic ecosystems and working out the procedures of sustainable use of aquatic resources.