Speciace Al, Fe a P v recentních sedimentech tří jezer v Maine, USA

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F08%3A00317706" target="_blank" >RIV/60077344:_____/08:00317706 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Speciation of Al, Fe, and P in recent sediment from three lakes in Maine, USA

Popis výsledku v původním jazyce

Sequential extraction of sediments from short cores from three lakes in Maine USA demonstrates that the ratios Al:Fe and Al:P for upper sediment for two oligo-mesotrophic lakes exceeds 3 and 25, the thresholds for preventing substantial release of P fromsediments during hypolimnetic anoxia. Hypolimnetic water chemistry verifies this effect. The third lake, currently eutrophic, has values for the ratios that are below the thresholds and this lake has substantial release of P from recent sediment. The sediment characteristics remain relatively constant over the last 150+ years, indicating that the processes responsible for P retention have operated long before atmospheric acidification of watersheds. Photo-oxidation of Al-DOC and Fe-DOC in the lake, liberation of Al and Fe, precipitation of their hydroxides, adsorption of P by the hydroxides, and sedimentation are responsible for the changes in water quality and long-term sediment characteristics.

Název v anglickém jazyce

Speciation of Al, Fe, and P in recent sediment from three lakes in Maine, USA

Popis výsledku anglicky

Sequential extraction of sediments from short cores from three lakes in Maine USA demonstrates that the ratios Al:Fe and Al:P for upper sediment for two oligo-mesotrophic lakes exceeds 3 and 25, the thresholds for preventing substantial release of P fromsediments during hypolimnetic anoxia. Hypolimnetic water chemistry verifies this effect. The third lake, currently eutrophic, has values for the ratios that are below the thresholds and this lake has substantial release of P from recent sediment. The sediment characteristics remain relatively constant over the last 150+ years, indicating that the processes responsible for P retention have operated long before atmospheric acidification of watersheds. Photo-oxidation of Al-DOC and Fe-DOC in the lake, liberation of Al and Fe, precipitation of their hydroxides, adsorption of P by the hydroxides, and sedimentation are responsible for the changes in water quality and long-term sediment characteristics.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DA - Hydrologie a limnologie

OECD FORD obor

—

Projekt

<a href="/cs/project/GA206%2F06%2F0410" target="_blank" >GA206/06/0410: Fotochemické změny speciace kovů a fosforu v přírodních vodách</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Science of the Total Environment

ISSN

0048-9697

e-ISSN

—

Svazek periodika

404

Číslo periodika v rámci svazku

2-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

000260701900008

EID výsledku v databázi Scopus

—