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Liquid ToF-SIMS revealing the oil, water, and surfactant interface evolution

Journal Article · · Physical Chemistry Chemical Physics. PCCP (Print)
DOI:https://doi.org/10.1039/D0CP00528B· OSTI ID:1603368

Bilge water from ships is regarded as a major pollutant in the marine environment. Bilge water exists in a stable oil-in-water (O/W) emulsion form. However, little is known about the O/W liquid–liquid (l–l) interface. Traditional bulk characterization approaches are not capable of capturing the chemical changes at the O/W l–l interface. Although surfactants are deemed essential in droplet formation, their roles in bilge water stabilization have not been fully revealed. We have utilized novel in situ chemical imaging tools including in situ scanning electron microscopy (SEM) and in situ time-of-flight secondary ion mass spectrometry (ToF-SIMS) to study the evolving O/W interface using a NAVY bilge model for the first time. The droplet size distribution (DSD) does not change significantly without the addition of X-100 surfactants under static or rocking conditions. Both the oil components and the water clusters are shown to evolve over time at the O/W droplet interface by in situ liquid SIMS imaging. Of particular interest to droplet stabilization, the contribution of surfactants to the aged bilge droplets becomes more significant as the droplet size increases. The higher mass surfactant component does not appear on the droplet surface immediately while many lower mass surfactants are solvated inside the droplet. We have provided the first three-dimensional images of the evolving O/W interface and demonstrated that in situ surface chemical mapping is powerful enough to reveal the complex and dynamic l–l interface in the liquid state. Our observational insights suggest that surfactants are important in mediating droplet growth and facilitating effective separation of bilge water emulsion.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1603368
Alternate ID(s):
OSTI ID: 1639917
Report Number(s):
PNNL-SA--147881
Journal Information:
Physical Chemistry Chemical Physics. PCCP (Print), Journal Name: Physical Chemistry Chemical Physics. PCCP (Print) Journal Issue: 21 Vol. 22; ISSN 1463-9076; ISSN PPCPFQ
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (45)

Zwitterionic Nanohydrogel Grafted PVDF Membranes with Comprehensive Antifouling Property and Superior Cycle Stability for Oil-in-Water Emulsion Separation journal August 2018
C60-ToF SIMS imaging of frozen hydrated HeLa cells: C60-ToF SIMS imaging of frozen hydrated HeLa cells journal February 2012
Improving in situ liquid SEM imaging of particles journal September 2019
Shipboard bilge water treatment by electrocoagulation powered by microbial fuel cells journal May 2019
A review on the application of different treatment processes for emulsified oily wastewater journal October 2018
Does interfacial photochemistry play a role in the photolysis of pyruvic acid in water? journal October 2018
The effect of pH and salt on the stability and physicochemical properties of oil-in-water emulsions prepared with gum tragacanth journal April 2016
In situ H2O2 generation for de-emulsification of fine stable bilge water emulsions journal March 2018
Predicting sizes of toluene-diluted heavy oil emulsions in turbulent flow. Part 1—Application of two adsorption kinetic models for σ E in two size predictive models journal November 2006
Surface evolution of synthetic bilgewater emulsion journal December 2019
Direct quantification of mono- and di-d-α-tocopherol polyethylene glycol 1000 succinate by high performance liquid chromatography journal December 2011
Electrochemical oil/water demulsification and purification of bilge water using Pt/Ir electrodes journal August 2010
Fish oil-loaded emulsions stabilized by synergetic or competitive adsorption of gelatin and surfactants on oil/water interfaces journal March 2020
Gelatin molecular structures affect behaviors of fish oil-loaded traditional and Pickering emulsions journal March 2020
Effect of preparation factors and storage temperature on fish oil-loaded crosslinked gelatin nanoparticle pickering emulsions in liquid forms journal October 2019
An experimental study of stability of oil–water emulsion journal February 2005
Comparative study of electrochemical wastewater treatment processes for bilge water as oily wastewater: A kinetic approach journal June 2015
Biodegradation of bilge water: Batch test under anaerobic and aerobic conditions and performance of three pilot aerobic Moving Bed Biofilm Reactors (MBBRs) at different filling fractions journal July 2018
TOF–SIMS surface analysis of chemical components of size–fractioned urban aerosols in a typical heavy air pollution event in Beijing journal July 2018
Temperature-dependent diffusion coefficient of oil from different sunflower seeds during extraction with hexane journal July 2011
Effects of surfactant type and preparation pH on the droplets and emulsion forms of fish oil-loaded gelatin/surfactant-stabilized emulsions journal January 2020
A review of petroleum emulsions and recent progress on water-in-crude oil emulsions stabilized by natural surfactants and solids journal June 2018
Identification and characterization of bilgewater emulsions journal November 2019
d -α-tocopheryl Polyethylene Glycol 1000 Succinate: A View from FTICR MS and Tandem MS journal January 2014
In Situ Molecular Imaging of the Biofilm and Its Matrix journal October 2016
Evolution of aqSOA from the Air–Liquid Interfacial Photochemistry of Glyoxal and Hydroxyl Radicals journal July 2019
Mesoscopic Structure Facilitates Rapid CO 2 Transport and Reactivity in CO 2 Capture Solvents journal September 2018
In Situ Characterization of Oil-in-Water Emulsions Stabilized by Surfactant and Salt Using Microsensors journal August 2017
Mussel-Inspired Hybrid Coatings that Transform Membrane Hydrophobicity into High Hydrophilicity and Underwater Superoleophobicity for Oil-in-Water Emulsion Separation journal April 2015
Chitosan-Based Aerogel Membrane for Robust Oil-in-Water Emulsion Separation journal October 2015
Design and Characterization of PEG-Derivatized Vitamin E as a Nanomicellar Formulation for Delivery of Paclitaxel journal June 2013
Fatty Acid Surfactant Photochemistry Results in New Particle Formation journal October 2017
Dark air–liquid interfacial chemistry of glyoxal and hydrogen peroxide journal August 2019
Synthesis and characterization of TPGS–gemcitabine prodrug micelles for pancreatic cancer therapy journal January 2016
Superhydrophilic and underwater superoleophobic nanofibrous membrane with hierarchical structured skin for effective oil-in-water emulsion separation journal January 2017
Deciphering the aqueous chemistry of glyoxal oxidation with hydrogen peroxide using molecular imaging journal January 2017
Two coexisting liquid phases in switchable ionic liquids journal January 2017
Molecular evidence of a toxic effect on a biofilm and its matrix journal January 2019
Probing liquid surfaces under vacuum using SEM and ToF-SIMS journal January 2011
Self-diffusion coefficients of water in pure water and in aqueous solutions of several electrolytes with 18O and 2H as tracers journal January 1978
Comparison of six particle size distribution models on the goodness-of-fit to particulate matter sampled from animal buildings journal February 2012
Surface Sensitivity in Cluster-Ion-Induced Sputtering journal June 2006
Making a hybrid microfluidic platform compatible for in situ imaging by vacuum-based techniques journal November 2011
Electrocoagulation and nanofiltration integrated process application in purification of bilge water using response surface methodology journal May 2016
The Viscosity and Combustion Characteristics of Single-Droplet Water-Diesel Emulsion journal May 2019

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