Long-term dynamics of watershed leaching and lake sediment sequestration of rare earth elements following deglaciation of two mountain watersheds.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F16%3A00459979" target="_blank" >RIV/60077344:_____/16:00459979 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10933-015-9872-0" target="_blank" >http://dx.doi.org/10.1007/s10933-015-9872-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10933-015-9872-0" target="_blank" >10.1007/s10933-015-9872-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Long-term dynamics of watershed leaching and lake sediment sequestration of rare earth elements following deglaciation of two mountain watersheds.

Popis výsledku v původním jazyce

Sediment cores from Sargent Mountain Pond (SMP), Maine, USA and Plešné Lake (PL), Czech Republic, record the entire post-glacial terrestrial vegetation and chemical dynamics of the watershed and lake from 16,600 and 14,600 Cal Yr BP, respectively, to the present. Total rare earth element (REE) concentrations and fluxes to the sediment declined from deglaciation until forest developed prior to the Younger Dryas (YD) (12,600–11,600 Cal Yr BP) at SMP, and immediately after the YD at PL, peaked in value just after the YD, and then declined to the present. Before the YD, REE concentrations were dominated by detrital, soluble apatite. Weathering of apatite contributed the phosphorus (P) sequestered in the lake sediment. After the YD, REE concentrations and fluxes behave coherently with NaOH-extractable aluminum (Al) and P after forestation in each catchment. Concentrations of extractable REEs, P, and Al peak after the YD and decline coherently to the present. After afforestation and development of organic-rich forest soils, concentrations of dissolved organic carbon (DOC) in soil water and runoff increased. Concurrently, the weathering of apatite released phosphate and Ca to runoff, raising pH about 8. The soil DOC complexed with and mobilized Al and REEs, which were transported to the lakes in runoff. There, photooxidation of the Al–DOC and REE–DOC complexes caused release of ionic, inorganic Al and REEs, precipitation of Al hydroxide in the higher-pH environment, adsorption of REEs and phosphate by the Al hydroxide, and irreversible sedimentation. REE concentrations and fluxes declined from the YD to the present because the apatite was progressively depleted in the soil by weathering, while REEs were increasingly retained by secondary Al and Fe hydroxides in the soil.

Název v anglickém jazyce

Long-term dynamics of watershed leaching and lake sediment sequestration of rare earth elements following deglaciation of two mountain watersheds.

Popis výsledku anglicky

Sediment cores from Sargent Mountain Pond (SMP), Maine, USA and Plešné Lake (PL), Czech Republic, record the entire post-glacial terrestrial vegetation and chemical dynamics of the watershed and lake from 16,600 and 14,600 Cal Yr BP, respectively, to the present. Total rare earth element (REE) concentrations and fluxes to the sediment declined from deglaciation until forest developed prior to the Younger Dryas (YD) (12,600–11,600 Cal Yr BP) at SMP, and immediately after the YD at PL, peaked in value just after the YD, and then declined to the present. Before the YD, REE concentrations were dominated by detrital, soluble apatite. Weathering of apatite contributed the phosphorus (P) sequestered in the lake sediment. After the YD, REE concentrations and fluxes behave coherently with NaOH-extractable aluminum (Al) and P after forestation in each catchment. Concentrations of extractable REEs, P, and Al peak after the YD and decline coherently to the present. After afforestation and development of organic-rich forest soils, concentrations of dissolved organic carbon (DOC) in soil water and runoff increased. Concurrently, the weathering of apatite released phosphate and Ca to runoff, raising pH about 8. The soil DOC complexed with and mobilized Al and REEs, which were transported to the lakes in runoff. There, photooxidation of the Al–DOC and REE–DOC complexes caused release of ionic, inorganic Al and REEs, precipitation of Al hydroxide in the higher-pH environment, adsorption of REEs and phosphate by the Al hydroxide, and irreversible sedimentation. REE concentrations and fluxes declined from the YD to the present because the apatite was progressively depleted in the soil by weathering, while REEs were increasingly retained by secondary Al and Fe hydroxides in the soil.

Druh

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

CEP obor

DJ - Znečištění a kontrola vody

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Paleolimnology

ISSN

0921-2728

e-ISSN

—

Svazek periodika

55

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

209-222

Kód UT WoS článku

000373304100002

EID výsledku v databázi Scopus

2-s2.0-84959142976