Original title: Mechanism of the Water Clusters Formation in the Organic Phase in the Presence of Hydrated Ions
Authors: Holub, Karel ; Samec, Zdeněk ; Mareček, Vladimír
Document type: Papers
Conference/Event: Moderní elektrochemické metody /39./, Jetřichovice (CZ), 20190520
Year: 2019
Language: eng
Abstract: A two-electrode cell comprising a liquid/liquid interface is used to study the water clusters formation in the organic solvent phase following the extraction of tetraalkylammonium chloride (TAACl) from the aqueous phase. The change in the concentration of the common TAA+ ion on the aqueous side of the interface is monitored by the open circuit potential measurements. It is shown that the amount of TAACl extracted into the organic phase exceeds considerably the limit determined by the concentration of Cl- in the organic phase at a given interfacial potential difference and the electroneutrality condition. A mechanism is proposed including an accumulation of the excess TAACl in the water clusters formed from the hydration shell of the Cl- ions, water already dissolved in the organic phase, and additional water extracted from the aqueous phase. At higher concentration of TAACl in the aqueous phase this process leads to the formation of emulsion in the organic phase.
Keywords: emulsification; liquid/liquid interface; water co-extraction dynemics
Project no.: GA17-09980S (CEP)
Funding provider: GA ČR
Host item entry: XXXIX. Moderní elektrochemické metody. Sborník přednášek, ISBN 978-80-905221-7-6

Institution: J. Heyrovsky Institute of Physical Chemistry AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0296733

Permalink: http://www.nusl.cz/ntk/nusl-395979


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Research > Institutes ASCR > J. Heyrovsky Institute of Physical Chemistry
Conference materials > Papers