Targeted nanoparticle binding & detection in petroleum hydrocarbon impacted porous media

Area of Science:

• Materials Science
• Environmental Science
• Nanotechnology

Background:

• Targeted nanoparticle binding is crucial for efficient payload delivery in pharmaceuticals and medical imaging.
• Similar challenges in environmental remediation and geophysical monitoring can benefit from targeted nanoparticle strategies.

Purpose of the Study:

• To demonstrate engineered nanoparticles' ability to selectively bind to crude oil-impacted silica sand.
• To investigate the influence of amphiphilic polymer coatings on nanoparticle binding behavior.
• To explore the application of these targeted nanoparticles in environmental remediation.

Main Methods:

• Utilized engineered nanoparticles with amphiphilic polymer coatings.
• Quantified nanoparticle attachment to clean and oil-impacted silica sand.
• Modified surface coatings to influence binding hydrophobicity.
• Employed Orbital Emission Spectroscopy and Vibrating Scanning Magnetometry for quantitative analysis.
• Used X-ray micro-computed tomography (CT) for qualitative 3-D visualization.

Main Results:

• Engineered nanoparticles showed selective adsorption to oil-impacted silica sand (8 mg/kg) compared to clean sand (2 mg/kg).
• Increased binding affinity was observed with more hydrophobic polymer coatings.
• Successful targeting and visualization of nanoparticles within a crude oil and silica sand mixture were achieved.

Conclusions:

• Engineered nanoparticles with amphiphilic coatings can effectively target crude oil in porous media.
• This targeted binding approach offers a viable solution for environmental remediation and monitoring.
• Non-destructive characterization techniques facilitate efficient analysis and imaging of nanoparticles in complex environmental samples.