Measurement and modelling of calcium diffusion in a sandstone

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00322360" target="_blank" >RIV/68407700:21110/18:00322360 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.5047613" target="_blank" >http://dx.doi.org/10.1063/1.5047613</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5047613" target="_blank" >10.1063/1.5047613</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement and modelling of calcium diffusion in a sandstone

Popis výsledku v původním jazyce

In the present study, we measured through-diffusion of calcium ions Ca2+ in aquatic solutions for a selected sandstone sample of porosity 27 % from the area of eastern Bohemia. The experiment was performed under laboratory conditions in a two-side plexiglass box at ambient temperature 20 ± 2 °C for a period of 264 hours. Calcium concentrations were analyzed chelatometrically. The experimental data were analyzed by the time-lag method and both the bulk and surface diffusion coefficients were estimated as Db = 3.65 x 10–9 m2s–1 and Ds = 3.22 x 10–10 m2s–1. In fact this is a maximal value that Ds attains, corresponding to about 0.6 % of the pore volume to be occupied by the surface diffusion of calcium. A strong sensitivity of the time-lag method for migrating particles with a slightly non-linear adsorption isotherm is pointed out.

Název v anglickém jazyce

Measurement and modelling of calcium diffusion in a sandstone

Popis výsledku anglicky

In the present study, we measured through-diffusion of calcium ions Ca2+ in aquatic solutions for a selected sandstone sample of porosity 27 % from the area of eastern Bohemia. The experiment was performed under laboratory conditions in a two-side plexiglass box at ambient temperature 20 ± 2 °C for a period of 264 hours. Calcium concentrations were analyzed chelatometrically. The experimental data were analyzed by the time-lag method and both the bulk and surface diffusion coefficients were estimated as Db = 3.65 x 10–9 m2s–1 and Ds = 3.22 x 10–10 m2s–1. In fact this is a maximal value that Ds attains, corresponding to about 0.6 % of the pore volume to be occupied by the surface diffusion of calcium. A strong sensitivity of the time-lag method for migrating particles with a slightly non-linear adsorption isotherm is pointed out.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Kumulativní časově závislé procesy ve stavebních materiálech a konstrukcích</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

THERMOPHYSICS 2018: 23rd International Meeting of Thermophysics 2018

ISBN

9780735417045

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

AIP Publishing, APL, the American Institute of Physics

Místo vydání

Melville, NY

Místo konání akce

Smolenice

Datum konání akce

7. 11. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—