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Uporaba različnih elektrokemijskih tehnik in elektrod pri študiju interakcij ionov težkih kovin v okoljuGrabec Švegl, Irena ; Ogorevc, Božidar ; Hudnik, VidaV našem prispevku je predstavljen metodološki pristop k elektrokemijskemu študiju vpliva ligandov na akumulacijo ionov težkih kovin iz modelnih raztopinna trdo fazo tal. Za detekcijo kovinskih ionov ... smo uporabljali dve vrsti delovnih elektrod kapljajočo Hg elektrodo in elektrodo iz ogljikove paste modificirano z glinenim mineralom vermikulitom in prstjo, ter različne elektrokemijske tehnike npr. diferencialno pulzno polarografijo, ciklično voltametrijo in "square wave" voltametrijo. Raztopino kovinskih ionov smo pri različnih eksperimentalnih pogojih titrirali z ligandi kot so pesticidi (atrazin in njegovi naravni razgradni produkti, bromofenoksim, phenmedipham, fenamifos) in huminska kislina. Na osnovi rezultatov titracij lahko opredelimo vpliv izbranih ligandov na kovinske ione npr. pH odvisnost interakcij, koordinacijsko število in pogojne konstante stabilnosti kompleksov, kompeticija za vezivna mesta na vermikulitu, interference drugih kationov. Predstavljeno eksperimentalno delo prikazuje enostavnost in priročnost elektrokemijskih tehnik pri detekciji ionov težkih kovin v okolju. Hkrati predstavlja to delo tudi nov pristop k študiju transporta in interakcij težkih kovin v tleh, kar je pomembno za boljše razumevanje vpliva teh elementov na žive organizme in pri sanaciji s težkimi kovinami onesnaženih tal.Source: Zbornik referatov s posvetovanja (Str. 191-196)Type of material - conference contributionPublish date - 1996Language - slovenianCOBISS.SI-ID - 710426
Author
Grabec Švegl, Irena |
Ogorevc, Božidar |
Hudnik, Vida
Topics
elektrokemija |
elektrode |
tehnike |
ioni težkih kovin |
okolje |
electrochemistry |
electrodes |
techniques |
heavy metal ions |
environment
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Grabec Švegl, Irena | 11596 |
Ogorevc, Božidar | 02285 |
Hudnik, Vida | 01027 |
Source: Personal bibliographies
and: SICRIS
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