Nano-sized bubbles in solution of hydrophobic dyes and the properties of the water/air interface

Mchedlov‐Petrossyan, Nikolay O.; Marfunin, Mykyta O.; Klochaniuk, Oleg R.

doi:10.1016/j.molliq.2018.11.073

Cited by 7 publications

(8 citation statements)

References 51 publications

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“…41 It should be noted that the described method is used not only for the investigation of micellar-like systems, such as calixarene aggregates, 42 cucurbiturils, 43 polyelectrolytes, 44 and phospholipid bilayers, 45,46 but for a variety of different systems as well, such as detonated nanodiamond particles, 47 fullerenols, 48 metal surfaces, 49 and air bubbles. 50 Proteins were also examined with this method, 51 up to a complete bacteriophage virus capsid. 52 Interestingly, the same factors accounted for in eq 2 cause the so-called "protein error", hindering pH determination with indicators.…”

Section: Measurement Of Electrophoretic Mobilitymentioning

confidence: 99%

Estimation of Nanoparticle’s Surface Electrostatic Potential in Solution Using Acid–Base Molecular Probes I: In Silico Implementation for Surfactant Micelles

et al. 2023

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Surface electrostatic potential Ψ is a key characteristic of colloid particles. Since the surface of the particles adsorbs various compounds and facilitates chemical reactions between them, Ψ largely affects the properties of adsorbed reactants and governs the flow of chemical reactions occurring between them. One of the most popular methods for estimating Ψ in hydrophilic colloids, such as micellar surfactant solutions and related systems, is the application of molecular probes, predominantly acid−base indicator dyes. The Ψ value is calculated from the difference of the probe's indices of the apparent acidity constant between the examined colloid solution and, usually, some other colloid solution with noncharged particles. Here, we show how to implement this method in silico using alchemical free energy calculations within the framework of molecular dynamics simulations. The proposed implementation is tested on surfactant micelles and is shown to predict experimental Ψ values with quantitative accuracy depending on the kind of surfactant. The sources of errors in the method are discussed, and recommendations for its application are given.

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Section: Measurement Of Electrophoretic Mobilitymentioning

confidence: 99%

Estimation of Nanoparticle’s Surface Electrostatic Potential in Solution Using Acid–Base Molecular Probes I: In Silico Implementation for Surfactant Micelles

et al. 2023

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“…OH − ions adsorption at the air/water interface was also shown by fluorescent spectroscopy with specific fluorescent dyes use, i.e., n -decylfluorescein and n -decyleosin. After demonstrating that dyes were most likely located at the air/water interface, the authors showed that above pH 3, dyes were negatively charged, which demonstrated OH − are adsorbed at the interface [ 99 ].…”

Section: Emulsifier-free Oil/water Interface Organizationmentioning

confidence: 99%

Review of High-Frequency Ultrasounds Emulsification Methods and Oil/Water Interfacial Organization in Absence of any Kind of Stabilizer

Perrin

Desobry‐Banon

Gillet³

et al. 2022

Foods

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Emulsions are multiphasic systems composed of at least two immiscible phases. Emulsion formulation can be made by numerous processes such as low-frequency ultrasounds, high-pressure homogenization, microfluidization, as well as membrane emulsification. These processes often need emulsifiers’ presence to help formulate emulsions and to stabilize them over time. However, certain emulsifiers, especially chemical stabilizers, are less and less desired in products because of their negative environment and health impacts. Thus, to avoid them, promising processes using high-frequency ultrasounds were developed to formulate and stabilize emulsifier-free emulsions. High-frequency ultrasounds are ultrasounds having frequency greater than 100 kHz. Until now, emulsifier-free emulsions’ stability is not fully understood. Some authors suppose that stability is obtained through hydroxide ions’ organization at the hydrophobic/water interfaces, which have been mainly demonstrated by macroscopic studies. Whereas other authors, using microscopic studies, or simulation studies, suppose that the hydrophobic/water interfaces would be rather stabilized thanks to hydronium ions. These theories are discussed in this review.

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“…Due to their broad color spectrum, increased fastness (i.e., resistance to color fading), and application versatility, reactive dyes are the most widely used dyes in the textile industry [1]. Several conventional physical, chemical, and biological treatments are used to speed up dye breakdown and reduce sludge [8]. The textile industry's liquid waste processing technology has advanced since 1995, starting with conventional chemical oxidation, activated carbon, coagulation-flocculation, and other decolorization methods.…”

Section: Introductionmentioning

confidence: 99%

“…According to research by Nikolay et al (2019), dye adsorption was at the water air interface. This adsorption was significantly influenced by the difference between the potentials of H + and OH − and the pH, which substantially influenced the affinity of HO − and H + consequently affecting the dye's ionization [8]. The potential to exploit the unique properties of NBs for improving water treatment is their ability to produce quasi-stable reactive oxygen species (ROS) on the surface of NBs to oxidize pollutants and pathogens in water.…”

Section: Introductionmentioning

confidence: 99%

Hydroxyl Radical-Based Advanced Oxidation Processes of Red Reactive Dyes by Ultrafine Bubbles Method

Sofia,

Hanam,

Sunardi

et al. 2024

Water

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The breakdown of dyes, which are environmentally hazardous substances and notoriously difficult to degrade, presents the main treatment challenge for wastewater from textile industries. Most advanced oxidation processes (AOPs) for dye degradation usually use costly decolorizing agents, whose residue from Wastewater Treatment Plants may be hazardous to the environment. The present study aimed to apply ultrafine bubbles (UFBs) for water AOPs to degrade textile dyes. Our most recent innovation, ultrafine bubbles, enables the production of reactive oxygen species recently introduced as oxidants in AOPs. First, the disc diffuser was optimized by introducing various flow rates of 1–5 L Per Minute (LPM) to generate UFBs with unique characteristics observed from Zeta Potential, pH, Dissolved Oxygen (DO), and Oxidation–Reduction Potential (ORP). The air UFBs using a disc diffuser with 3 LPM were selected to degrade the Navacron Ruby S-3B dye solution (1000 Pt-Co). The treatment was optimized on the coagulant dosage (0.25, 0.5, 0.75, and 1 ppm) and bubbling times (0–120 min). As a result, the UFBs were successful in degrading the Navacron Ruby S-3B dye solution, resulting in a 45% reduction in Pt-Co color scale with a bubbling time of only 120 min and minimal coagulant dosage (0.5 ppm) compared to the Navacron Ruby S-3B dye solution treatment commonly using a coagulant dosage of 1.5 ppm without UFBs. Based on FTIR, XRF, and PL analysis, we propose the AOP mechanism of hydroxyl radicals for the Navacron Ruby S-3B dye solution. It is emphasized that UFB water AOPs (UFBs–WAOPs) represent a promising alternative technology for treating textile wastewater without chemicals or decolorizing agents. Thus, the UFBs-WAOPs are economical and environmentally benign textile wastewater treatment methods.

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Nano-sized bubbles in solution of hydrophobic dyes and the properties of the water/air interface

Cited by 7 publications

References 51 publications

Estimation of Nanoparticle’s Surface Electrostatic Potential in Solution Using Acid–Base Molecular Probes I: In Silico Implementation for Surfactant Micelles

Estimation of Nanoparticle’s Surface Electrostatic Potential in Solution Using Acid–Base Molecular Probes I: In Silico Implementation for Surfactant Micelles

Review of High-Frequency Ultrasounds Emulsification Methods and Oil/Water Interfacial Organization in Absence of any Kind of Stabilizer

Hydroxyl Radical-Based Advanced Oxidation Processes of Red Reactive Dyes by Ultrafine Bubbles Method

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