Facultatea de Chimie şi Tehnologie Chimică / Faculty of Chemistry and Chemical Technology

Permanent URI for this communityhttps://msuir.usm.md/handle/123456789/5

Browse

Author: search.filters.author.Bunduchi, ElenaSubject: search.filters.subject.hydrogen peroxide

Search Results

Now showing 1 - 7 of 7
  • Thumbnail Image
    Item
    ASSESSMENT OF KINETIC PARAMETERS IN THE WATERS OF THE NISTRU COURSE IN THE SECTION NASLAVCEA – DUBASARI
    (2006) Bunduchi, Elena; Duca, Gheorghe; Gladchi, Viorica; Goreaceva, Nelli; Mardari, Igor
    The current work represents the results of a monitoring executed on Nistru River waters between October 2003 and September 2005. The water quality was evaluated on the basis of such kinetic indicators as redox state and capacity of inhibition. The obtained results shows that Nistru River water in the segment Naslavcea village – Dubasari barrage are continuously polluted with reducing substances that diminish the H2O2 content, that actually determines the redox state of natural waters and the content of free radicals
  • Thumbnail Image
    Item
    THE STUDY OF REDOX CONDITIONS IN THE DNIESTER RIVER
    (2008) Gladchi, Viorica; Goreaceva, Nelli; Duca, Gheorghe; Bunduchi, Elena; Romanciuc, Lidia; Mardari, Igor; Borodaev, Ruslan
    The work presented in the paper discusses the contribution of the Novodnestrovsc water system to the formation of redox conditions in the lower Dniester. The conclusions were drawn on the basis of a long-term protocol of analyses that included the analysis of the oxygen regime, evaluation of the content of hydrogen peroxide,rH2, biological oxygen demand as well as other additional parameters.
  • Thumbnail Image
    Item
    ESTIMATION OF THE NATURAL WATER SELF-PURIFICATION CAPACITY FROM THE KINETIC STANDPOINT
    (2008) Duca, Gheorghe; Bunduchi, Elena; Gladchi, Viorica; Romanciuc, Lidia; Goreaceva, Nelli
    The current paper contains a synthesis of the processes of chemical auto-purification that take place in natural waters; examples of mechanisms of such processes occurring with participation of dissolved organic matter, oxidants of the biogeochemical cycle of oxygen and of transition metals including copper and iron are presented. The kinetic indicators of natural water quality are presented as well.
  • Thumbnail Image
    Item
    EVALUAREA, ÎN BAZA P RODUSELOR DE ACTIVAR E ALE OXIGENULUI, A POLUĂRII ŞI A AUTOP URIFICĂRII PRIN PROC ESE REDOX A UNOR APE NATURALE
    (CEP USM, 2020) Bunduchi, Elena; Gladchi, Viorica
    Lucrarea de faţă prezintă rezultate ale supravegherii proceselor de poluare şi autopurificare a unor ape naturale sus ţinute de H 2 O 2 şi radicalii OH, din perioada anului 2019. Obiectele monitorizate au fost fl. Nistru, afluenţii săi r. Răut şi r. Ichel, la gurile de confluenţă cu fluviul, precum şi două lacuri de acumulare amplasate în bazinul hidrografic al fl. Nistru, Ghidighici şi Dănceni. Valorile atestate indică la existenţa unor cantităţi scăzute sau chiar lipsa peroxidului de hidrogen, precum şi la prezenţa unor concentraţii importante de substanţe ce întrerup lanţul de autopurificare cu radicalii OH. Acest fapt demonstrează că a existat un consum constant de produse de activare ale oxigenului în procesele redox ce susţin capacitatea de autopurifi care a apelor naturale monitorizate.
  • Thumbnail Image
    Item
    THE STUDY OF REDOX CONDITIONS IN THE DNIESTER RIVER
    (Academia de Știinițe a Moldovei, 2008) Gladchi, Viorica; Goreaceva, Nelli; Duca, Gheorghe; Bunduchi, Elena; Romanciuc, Lidia; Mardari, Igor; Borodaev, Ruslan
    The work presented in the paper discusses the contribution of the Novodnestrovsc water system to the formation of redox conditions in the lower Dniester. The conclusions were drawn on the basis of a long-term protocol of analyses that included the analysis of the oxygen regime, evaluation of the content of hydrogen peroxide, rH2, biological oxygen demand as well as other additional parameters.
  • Thumbnail Image
    Item
    ESTIMATION OF THE NATURAL WATER SELF-PURIFICATION CAPACITY FROM THE KINETIC STANDPOINT
    (Academia de Știinițe a Moldovei, 2008) Duca, Gheorghe; Bunduchi, Elena; Gladchi, Viorica; Romanciuc, Lidia; Goreaceva, Nelli
    The current paper contains a synthesis of the processes of chemical auto-purification that take place in natural waters; examples of mechanisms of such processes occurring with participation of dissolved organic matter, oxidants of the biogeochemical cycle of oxygen and of transition metals including copper and iron are presented. The kinetic indicators of natural water quality are presented as well.
  • Thumbnail Image
    Item
    ASSESSMENT OF KINETIC PARAME TERS IN THE WATERS OF THE NISTRU COURSE IN THE SECT ION NASLAVCEA – DUBASARI
    (Academia de Știinițe a Moldovei, 2006) Bunduchi, Elena; Duca, Gheorghe; Gladchi, Viorica; Goreaceva, Nelli; Mardari, Igor
    The current work represents the results of a monitoring executed on Nistru River waters between October 2003 and September 2005. The water quality was valuated on the basis of such kinetic indicators as redox state and capacity of inhibition. The obtained results shows that Nistru River water in the segment Naslavcea village – Dubasari barrage are continuously polluted with reducing substances that diminish the H2O2 content, that actually determines the redox state of natural waters and the content of free radicals