Stability of nanobubbles generated in water using porous membrane system

Karol Ulatowski , Paweł Sobieszuk , Andrzej Mróz , Tomasz Ciach

Abstract

The focus of this work was to examine the stability of gas nanobubbles in water. The generation of nanobubbles was carried out in two porous-membrane modules for two distinct values of liquid flow rate. Gas phase was nitrogen or oxygen, and the liquid phase was distilled water. Samples of nanodispersions were stored for 10 to 35 days. Half of them were stored open and other half closed to ensure or deny contact with the atmosphere, respectively. During storage Sauter diameter and zeta potential of nanobubbles were measured. Additionally, in the case of oxygen the dissolved gas concentration was measured. The result shows that stability and size of nanobubbles did not depend on whether samples were left open or closed. Obtained nanobubbles were stable for over a month and their Sauter diameter approached the value in the range 250–350 nm from different initial sizes. Additionally, the average zeta potential of nanobubbles in stable dispersions was between -10mV and -15mV in pure water without any frother additions. Furthermore, the discussion of reasons of stability of bubbles was carried out.
Author Karol Ulatowski (FCPE / DBBE)
Karol Ulatowski,,
- Department of Biotechnology and Bioprocess Engineering
, Paweł Sobieszuk (FCPE / DBBE)
Paweł Sobieszuk,,
- Department of Biotechnology and Bioprocess Engineering
, Andrzej Mróz - [NET Water Technologies]
Andrzej Mróz,,
-
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, Tomasz Ciach (FCPE / DBBE)
Tomasz Ciach,,
- Department of Biotechnology and Bioprocess Engineering
Journal seriesChemical Engineering and Processing : Process Intensification, ISSN 0255-2701, (A 30 pkt)
Issue year2019
Vol136
Pages62-71
Publication size in sheets0.5
Keywords in Englishnanobubble, stability, long lifetime, zeta potential, DO concentration
ASJC Classification2209 Industrial and Manufacturing Engineering; 1508 Process Chemistry and Technology; 2102 Energy Engineering and Power Technology; 1500 General Chemical Engineering; 1600 General Chemistry
DOIDOI:10.1016/j.cep.2018.12.010
URL https://www.sciencedirect.com/science/article/pii/S0255270118308973?via%3Dihub
Languageen angielski
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Ulatowski K. (i in.) - Stability of nanobubbles....pdf of 15-01-2019
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Score (nominal)30
ScoreMinisterial score = 30.0, 23-07-2019, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.205; WoS Impact Factor: 2017 = 2.826 (2) - 2017=3.096 (5)
Citation count*1 (2019-08-18)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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