Towards green flotation: Investigating the effect of rhamnolipid biosurfactant on single bubble adhesion dynamics

Kód výsledku v IS VaVaI

RIV/60461373:22340/23:43927785 - isvavai.cz

Výsledek na webu

https://www.sciencedirect.com/science/article/pii/S0167732223015647?via%3Dihub

DOI - Digital Object Identifier

10.1016/j.molliq.2023.122759

Jazyk výsledku

angličtina

Název v původním jazyce

Towards green flotation: Investigating the effect of rhamnolipid biosurfactant on single bubble adhesion dynamics

Popis výsledku v původním jazyce

In this study we performed an experimental analysis of the influence of rhamnolipid (RL) biosurfactant produced by Pseudomonas aeruginosa on the dynamics of bubble adhesion onto model surfaces of various hydrophobicity. The attachment time of a single bubble to a solid surface with contact angles of 6, 34, 49 and 80° was evaluated at different concentrations of RL in the range of 0 to 500 mg·dm−3, both at pH 5 (non-ionic form) and pH 10 (anionic form). The dependence of the three-phase contact (TPC) formation time on biosurfactant concentration was determined by monitoring the bubble-solid surface interactions using a high-speed camera. It was found that as the concentration of RL rises, the formation time of the TPC extends as a result of an increase in the film drainage time. A significant effect of RL on the process of TPC expansion (lower rate) and the size of the contact area between the bubble and the surface (smaller surface area) was also noted. This study provides a better understanding of the effect of one of the most popular biosurfactants on the fundamental act of the flotation process: attachment of the particle to the bubble. © 2023 The Author(s)

Název v anglickém jazyce

Towards green flotation: Investigating the effect of rhamnolipid biosurfactant on single bubble adhesion dynamics

Popis výsledku anglicky

In this study we performed an experimental analysis of the influence of rhamnolipid (RL) biosurfactant produced by Pseudomonas aeruginosa on the dynamics of bubble adhesion onto model surfaces of various hydrophobicity. The attachment time of a single bubble to a solid surface with contact angles of 6, 34, 49 and 80° was evaluated at different concentrations of RL in the range of 0 to 500 mg·dm−3, both at pH 5 (non-ionic form) and pH 10 (anionic form). The dependence of the three-phase contact (TPC) formation time on biosurfactant concentration was determined by monitoring the bubble-solid surface interactions using a high-speed camera. It was found that as the concentration of RL rises, the formation time of the TPC extends as a result of an increase in the film drainage time. A significant effect of RL on the process of TPC expansion (lower rate) and the size of the contact area between the bubble and the surface (smaller surface area) was also noted. This study provides a better understanding of the effect of one of the most popular biosurfactants on the fundamental act of the flotation process: attachment of the particle to the bubble. © 2023 The Author(s)

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF MOLECULAR LIQUIDS

ISSN

0167-7322

e-ISSN

1873-3166

Svazek periodika

388

Číslo periodika v rámci svazku

388

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

122759

Kód UT WoS článku

001059891000001

EID výsledku v databázi Scopus

2-s2.0-85167439057