Repozitorij Univerze v Novi Gorici

Iskanje po repozitoriju
A+ | A- | Pomoč | SLO | ENG

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju

Opcije:
  Ponastavi


1 - 5 / 5
Na začetekNa prejšnjo stran1Na naslednjo stranNa konec
1.
Introduction of a Redox-Responsive Switch into calix[4]arene-based Covalent Organic Nanosheets for Environmental Applications
Tina Skorjanc, 2018, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: redox chemistry, viologen, covalent organic polymers, calixarene, dye adsorption, iodine adsorption
Objavljeno v RUNG: 11.09.2020; Ogledov: 2551; Prenosov: 0
Gradivo ima več datotek! Več...

2.
Redox-Tunable Polycationic Polymers for Environmental Applications
Tina Skorjanc, Goinda Das, Selbi Nuryyeva, Thirumurugan Prakasam, Ali Trabolsi, 2017, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: covalent polymers, viologen, redox chemistry, pollutant removal, dye adsorption, iodine capture
Objavljeno v RUNG: 10.09.2020; Ogledov: 2571; Prenosov: 0
Gradivo ima več datotek! Več...

3.
4.
5.
Variations in U concentrations and isotope signatures in two Canadian lakes impacted by U mining: A combination of anthropogenic and biogeochemical processes
Wei Wang, Duc Huy Dang, Breda Novotnik, Thai T. Phan, R. Douglas Evans, 2019, izvirni znanstveni članek

Opis: Temporal and vertical variations in uranium (U) concentrations and U isotope (δ238U, ‰) signatures were examined in sediment cores collected seven times over a one year period, from two lakes in Ontario, Canada, which are contaminated with U by historical mining activities. Bow Lake is holomictic, experiencing seasonal anoxia, while the sediments of meromictic Bentley Lake are permanently anoxic. Average annual peak concentrations of U in Bow Lake subsurface sediments were approximately 300 μg L−1 and 600 μg g−1 in porewater and bulk sediments, respectively. Similar ranges of concentrations (900 μg L−1 and 600 μg g−1, respectively) were observed in Bentley Lake sediments. The exceedingly high levels of U observed in the porewaters of both lakes, as well as the seasonal variability in U levels, challenge the traditional paradigm regarding U chemistry, i.e., that reduced U(IV) should be insoluble under anoxic conditions. The average annual δ238U ‰ values at the sediment-water interface of both lakes were similar (i.e., 0.47 ± 0.09‰ and 0.50 ± 0.16‰, relative to IRMM-184). The deep sediments in both Bentley Lake and Bow Lake record U isotope composition with a typical fractionation of 0.6‰ relative to the surface water, confirming authigenic U accumulation, i.e., negligible contribution of particulate material from the tailings. Also, the δ238U values in porewater have an average offset of ca. −0.1‰ relative to bulk sediments in anoxic zones and are reversed in the oxic sediment layer.
Ključne besede: Uranium Isotope composition Uranium tailings Biogeochemical cycling Redox chemistry
Objavljeno v RUNG: 09.10.2019; Ogledov: 3120; Prenosov: 0
Gradivo ima več datotek! Več...

Iskanje izvedeno v 0.04 sek.
Na vrh