Your browser does not allow JavaScript!
JavaScript is necessary for the proper functioning of this website. Please enable JavaScript or use a modern browser.
Open Science Slovenia
Open Science
DiKUL
slv
|
eng
Search
Browse
New in RUL
About RUL
In numbers
Help
Sign in
Anomalies detected during hydrodynamic cavitation when using salicylic acid dosimetry to measure radical production
ID
Zupanc, Mojca
(
Author
),
ID
Petkovšek, Martin
(
Author
),
ID
Zevnik, Jure
(
Author
),
ID
Kozmus, Gregor
(
Author
),
ID
Šmid, Alenka
(
Author
),
ID
Dular, Matevž
(
Author
)
PDF - Presentation file,
Download
(1,96 MB)
MD5: 82C554ED8F4CD859F4C8E36F004CCD65
URL - Source URL, Visit
https://www.sciencedirect.com/science/article/pii/S1385894720313814
Image galllery
Abstract
Cavitation used to be associated with negative outcomes in hydraulic turbomachinery but nowadays it is often used for water cleaning, microorganism’s destruction and degradation of organic compounds. This study investigated the amount of ·OH formed during hydrodynamic cavitation using salicylic acid dosimetry. The radical’s amount was evaluated by quantifying the concentration of 2,3-dihydroxybenzoic acid, catechol and 2,5-dihydroxybenzoic acid. Two concentrations of the dosimeter in tap water were investigated, 50 and 300 mg L$^{−1}$ (pH approx. 2.5). After 90 min of cavitation using a Venturi constriction a sum of the three products was determined at 0.97 µg mL$^{−1}$ and 1.81 µg mL$^{−1}$, respectively. However, during the investigation the anomalies were detected in the cavitation development when higher concentration of salicylic acid was used – cavitation appeared more gentle, with less intense collapses, unrelated to the one in pure water. Detailed observations of cavitation and additional bubble dynamics simulations revealed that the decreased surface tension of the acidified salicylic acid solution is the most influential physical characteristic. Further experiments on nucleation and coalescence showed that high concentration of salicylic acid also leads to longer stability of the bubbles and prevents their coalescence due to short-range repulsive forces (steric hindrance), which results in less violent bubble collapse. We also discuss the importance of an appropriate amount of the dosimeter for correct evaluation of ·OH production in a given cavitation device (50 mg L$^{−1}$ for the present one). This is essential for further cavitation exploitation studies to avoid false interpretation of the gathered results.
Language:
English
Keywords:
cavitation
,
nucleation
,
coalescence
,
salicylic acid dosimetry
,
anomalies
,
physical characteristics
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
FFA - Faculty of Pharmacy
Publication status:
Published
Publication version:
Version of Record
Year:
2020
Number of pages:
11 str.
Numbering:
Vol. 396, art. 125389
PID:
20.500.12556/RUL-116143
UDC:
532.528(045)
ISSN on article:
1385-8947
DOI:
10.1016/j.cej.2020.125389
COBISS.SI-ID:
15039491
Publication date in RUL:
18.05.2020
Views:
1743
Downloads:
612
Metadata:
Cite this work
Plain text
BibTeX
EndNote XML
EndNote/Refer
RIS
ABNT
ACM Ref
AMA
APA
Chicago 17th Author-Date
Harvard
IEEE
ISO 690
MLA
Vancouver
:
Copy citation
Share:
Record is a part of a journal
Title:
Chemical engineering journal
Shortened title:
Chem. eng. j.
Publisher:
Elsevier
ISSN:
1385-8947
COBISS.SI-ID:
2110998
Licences
License:
CC BY 4.0, Creative Commons Attribution 4.0 International
Link:
http://creativecommons.org/licenses/by/4.0/
Description:
This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Secondary language
Language:
Slovenian
Keywords:
kavitacija
,
nukleacija
,
koalescenca
,
dozimetrija salicilne kisline
,
anomalije
,
fizikalne lastnosti
Projects
Funder:
EC - European Commission
Funding programme:
H2020
Project number:
771567
Name:
An investigation of the mechanisms at the interaction between cavitation bubbles and contaminants
Acronym:
CABUM
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0401
Name:
Energetsko strojništvo
Funder:
ARRS - Slovenian Research Agency
Project number:
P1-0208
Name:
Farmacevtska kemija: načrtovanje, sinteza in vrednotenje učinkovin
Funder:
ARRS - Slovenian Research Agency
Project number:
J7-1814
Name:
Kavitacija - rešitev za problematiko mikroplastike?
Similar documents
Similar works from RUL:
Similar works from other Slovenian collections:
Back