Characterization of two low-charge vermiculites after hydrochloric acid treatment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F15%3A86095603" target="_blank" >RIV/61989100:27360/15:86095603 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27740/15:86095603 RIV/61989100:27640/15:86095603
Result on the web
<a href="https://www.irsm.cas.cz/materialy/acta_content/2015_doi/Kupkova_AGG_2015_0027.pdf" target="_blank" >https://www.irsm.cas.cz/materialy/acta_content/2015_doi/Kupkova_AGG_2015_0027.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.13168/AGG.2015.0027" target="_blank" >10.13168/AGG.2015.0027</a>

Result language
angličtina
Original language name
Characterization of two low-charge vermiculites after hydrochloric acid treatment
Original language description
Two natural vermiculites (Ver) with very similar chemical composition but slightly different low charge on the layers were investigated to find an answer the question, how to change their structural and chemical properties after exposure to different concentrations of HCl solutions. Vermiculite from Bulgaria (Ver-B) with the layer charge 0.47 eq/O10(OH)2 and from Brazil (Ver-SL) with the layer charge 0.36 eq/O10(OH)2 were studied on their particle size fraction less than 40 ?m after treatment at different HCl concentrations (0.5 M HCl and 1 M HCl). Both samples represent a mixed-layer structure after incomplete transformation of mica (biotite) to vermiculite. Based on the XRD patterns, Ver-B may be considered as the mixed-layer vermiculite interstratified with small proportion of mica layers and Ver-SL as the mixed-layer mica-vermiculite. The leaching with 0.5 M HCl increased SA of Ver-B from 29.5 m2.g-1 to 261 m2.g-1 at Ver-B05 in comparison with the SA of Ver-SL from 14.0 m2.g-1 to 1
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JJ - Other materials
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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