Dynamika a mechanismus interakce albit-voda za normálních podmínek

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F10%3A00046578" target="_blank" >RIV/00216224:14310/10:00046578 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

čeština

Název v původním jazyce

Dynamika a mechanismus interakce albit-voda za normálních podmínek

Popis výsledku v původním jazyce

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 bulkfeldspar 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, butone of them can dominate during different dissolution stages, based on instantaneous activities of single species (number of accessible bonds) on mineral surface.

Název v anglickém jazyce

Dynemics and mechanism of feldspar-šater interaction under ambient conditions

Popis výsledku anglicky

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 bulkfeldspar 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, butone of them can dominate during different dissolution stages, based on instantaneous activities of single species (number of accessible bonds) on mineral surface.

Druh

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

CEP obor

DD - Geochemie

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Geologické výzkumy na Moravě a ve Slezsku

ISSN

1212-6209

e-ISSN

—

Svazek periodika

XVII

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

3

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—