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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F10%3A00046578%21RIV11-MSM-14310___
rdf:type
skos:Concept n9:Vysledek
dcterms:description
The aim of this work was to contribute to better understanding of feldspar weathering under surface conditions. Laboratory experiments were focused on dissolution stoichiometry and fluxes of single species into solution as a function of dissolution stages. The fluxes of Na and Al from feldspar exceeded that one of Si during the early stages. During the more advanced stages, the Na-fluxes was lower than the both Al- and Si-fluxes. Finally, the fluxes of individual species were nearly consistent with bulk feldspar stoichiometry. A conceptual dissolution model was proposed, based on three processes: (1) extremely fast hydrolysis of Na-O bonds, (2) fast hydrolysis of Al-O bonds, and (3) slow hydrolysis of SiO bonds. All the processes run concurrently, but one of them can dominate during different dissolution stages, based on instantaneous activities of single species (number of accessible bonds) on mineral surface. The aim of this work was to contribute to better understanding of feldspar weathering under surface conditions. Laboratory experiments were focused on dissolution stoichiometry and fluxes of single species into solution as a function of dissolution stages. The fluxes of Na and Al from feldspar exceeded that one of Si during the early stages. During the more advanced stages, the Na-fluxes was lower than the both Al- and Si-fluxes. Finally, the fluxes of individual species were nearly consistent with bulk feldspar stoichiometry. A conceptual dissolution model was proposed, based on three processes: (1) extremely fast hydrolysis of Na-O bonds, (2) fast hydrolysis of Al-O bonds, and (3) slow hydrolysis of SiO bonds. All the processes run concurrently, but one of them can dominate during different dissolution stages, based on instantaneous activities of single species (number of accessible bonds) on mineral surface. The aim of this work was to contribute to better understanding of feldspar weathering under surface conditions. Laboratory experiments were focused on dissolution stoichiometry and fluxes of single species into solution as a function of dissolution stages. The fluxes of Na and Al from feldspar exceeded that one of Si during the early stages. During the more advanced stages, the Na-fluxes was lower than the both Al- and Si-fluxes. Finally, the fluxes of individual species were nearly consistent with bulk feldspar stoichiometry. A conceptual dissolution model was proposed, based on three processes: (1) extremely fast hydrolysis of Na-O bonds, (2) fast hydrolysis of Al-O bonds, and (3) slow hydrolysis of SiO bonds. All the processes run concurrently, but one of them can dominate during different dissolution stages, based on instantaneous activities of single species (number of accessible bonds) on mineral surface.
dcterms:title
Dynamika a mechanismus interakce albit-voda za normálních podmínek Dynemics and mechanism of feldspar-šater interaction under ambient conditions Dynamika a mechanismus interakce albit-voda za normálních podmínek
skos:prefLabel
Dynamika a mechanismus interakce albit-voda za normálních podmínek Dynemics and mechanism of feldspar-šater interaction under ambient conditions Dynamika a mechanismus interakce albit-voda za normálních podmínek
skos:notation
RIV/00216224:14310/10:00046578!RIV11-MSM-14310___
n6:aktivita
n7:Z
n6:aktivity
Z(MSM0021622412)
n6:cisloPeriodika
1-2
n6:dodaniDat
n11:2011
n6:domaciTvurceVysledku
n16:6717373 n16:2069709
n6:druhVysledku
n18:J
n6:duvernostUdaju
n10:S
n6:entitaPredkladatele
n8:predkladatel
n6:idSjednocenehoVysledku
255586
n6:idVysledku
RIV/00216224:14310/10:00046578
n6:jazykVysledku
n13:cze
n6:klicovaSlova
feldapar; dissolution; flux; model; stoichiometry; weathering
n6:klicoveSlovo
n14:flux n14:stoichiometry n14:feldapar n14:model n14:dissolution n14:weathering
n6:kodStatuVydavatele
CZ - Česká republika
n6:kontrolniKodProRIV
[2DB1EFD596F0]
n6:nazevZdroje
Geologické výzkumy na Moravě a ve Slezsku
n6:obor
n17:DD
n6:pocetDomacichTvurcuVysledku
2
n6:pocetTvurcuVysledku
2
n6:rokUplatneniVysledku
n11:2010
n6:svazekPeriodika
XVII
n6:tvurceVysledku
Faimon, Jiří Šulák, Miroslav
n6:zamer
n12:MSM0021622412
s:issn
1212-6209
s:numberOfPages
3
n5:organizacniJednotka
14310