E-viri
Recenzirano
Odprti dostop
-
Vejvodová, Kateřina; Vaněk, Aleš; Mihaljevič, Martin; Ettler, Vojtěch; Trubač, Jakub; Vaňková, Maria; Drahota, Petr; Vokurková, Petra; Penížek, Vít; Zádorová, Tereza; Tejnecký, Václav; Pavlů, Lenka; Drábek, Ondřej
Environmental pollution, October 2020, 2020-10-00, 20201001, Letnik: 265Journal Article
We studied the key geochemical and mineralogical factors that could affect the fractionation of stable thallium (Tl) isotopes in soil. A set of grassland soil samples enriched in geogenic Tl in combination with selected Tl-containing mineral materials from the Czech Republic (Kluky) were investigated for this purpose. The results demonstrate significant incorporation of Tl in pedogenic (specific) Mn-oxide, which led to a large accumulation of the heavy 205Tl isotope (∼+14 ε205Tl units), presumably resulting from oxidative Tl sorption. Consequently, we concluded that the Mn-oxide-controlled Tl uptake is the primary cause of the observed 205Tl enrichment in the middle profile zone, at the A/B soil horizon interface, with up to +4 of ε205Tl. Furthermore, our results displayed a clear relationship between the Tl isotopic fractionation degree and the Mn-oxide soil concentration (R2 = 0.6), as derived from the oxalate-extractable data. A combination of soil and mineralogical considerations suggests that 205Tl enrichment in respective soil samples is also partly due to the Tl present in micaceous clay minerals, mainly illite, which is the predominant pedogenic Tl host phase. In line with our previous results, this Tl behavior can be inferred from systematic Mn-oxide degradation and the associated Tl (enriched in 205Tl) cycling in the studied soils and thus, presumably in the redoximorphic soils in general. Display omitted •Manganese-oxide was found to be the key control for Tl isotopic fractionation.•We identified up to +14 ε205Tl units in pedogenic Mn-oxide nodules.•The soil Mn-oxide concentration affected the Tl isotopic fractionation degree.•Heavy 205Tl isotope enrichment was present at the soil A/B horizon interface.•The heavy 205Tl isotope was probably enriched in illite as well. Manganese (III,IV)-oxides represent the key control for Tl isotopic fractionation in soil.
Vnos na polico
Trajna povezava
- URL:
Faktor vpliva
Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
---|
Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
---|
Vir: Osebne bibliografije
in: SICRIS
To gradivo vam je dostopno v celotnem besedilu. Če kljub temu želite naročiti gradivo, kliknite gumb Nadaljuj.