Naslov
Raspodjela kemijskih vrsta bakra u vodenom okolišu
(Copper redox speciation in aqueous environment)

Autori
Crmarić, Dora ; Bura-Nakić, Elvira

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
6. simpozij studenata doktorskih studija PMF-a : knjiga sažetaka / Schneider, Petra - Zagreb, 2022, 302-303

ISBN
978-953-6076-93-2

Skup
6th Faculty of Science PhD Student Symposium

Mjesto i datum
Zagreb, Hrvatska, 23.04.2022. - 24.04.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
bakar, redoks specijacija, L-cistein, 3-merkaptopropionska kiselina
(copper, redox speciation, L-cysteine, 3-mercaptopropionic acid)

Sažetak
Copper (Cu) is an essential micronutrient to the most aquatic organisms. However, at high concentrations free copper ion is toxic to the most living species. It is predicted that free copper concentrations will increase due to the anthropogenic pollution by 50% by the end of the century. Many aquatic organisms are producing ligands as defense mechanism against the toxicity of the free copper. Ligands such as thiols and humic substances are binding Cu, reducing its bioavailability. Copper in oxygenated systems such as oceans is primarily present as Cu(II), leading to speciation models assuming only Cu(II) as significant Cu state. Only few studies reported detectable amounts of Cu(I) in estuaries and oceans, with Cu(I) concentrations ranging from 5- 10% in oceans and up to 80% in estuaries. In this work research on copper reduction from Cu(II) to Cu(I) under different conditions, such as pH and ligand concentrations, will be presented. Cu(I) complex stability will also be discussed. Multimethod approach is used for determination of Cu(I) and for studies of Cu(I) complexes, including chromatographic and spectrophotometric methods.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA