Abstract
The interplay of metal oxide nanoparticles, environmental pollution, and health risks is key to all industrial and drinking water treatment processes. In this work we present a study using gel filtration chromatography for the analytical investigation of metal oxide nanoparticles in water, their coating with polydopamine, and their encapsulation within lecithin liposomes. Polydopamine prevents TiO2 and ZnO nanoparticles from aggregation during chromatographic separation. Lecithin forms liposomes that encapsulate the nanoparticles and carry them through the gel filtration column, producing an increase of peak area for quantitative analysis without any change in retention time to affect qualitative identification. To the best of our knowledge, this is the first report that demonstrates the potential application of lecithin liposomes for cleaning up metal oxide nanoparticles in water treatment. Encapsulation of graphene quantum dots by liposomes would allow for monitoring of nanoparticle-loaded liposomes to ensure their complete removal by membrane ultrafiltration from treated water.
Highlights
Nanomaterials exhibit novel physicochemical properties that continue to promote their use in various industrial manufacturing processes
Their encapsulation within lecithin liposomes, their fluorescence properties were studied in and their encapsulation within lecithin liposomes, their fluorescence properties were studied in order order to determine the excitation and emission wavelengths for selective and sensitive detection
Ultrasonic homogenization was evaluated for facilitating the encapsulation of TiO2 -PDA nanoparticles homogenization was evaluated for facilitating the encapsulation of TiO2-PDA nanoparticles by by lecithin liposomes, by observing if reproducible peaks could be obtained from Gel filtration chromatography (GFC)-Fluorescence detection (FD) analysis lecithin liposomes, by observing if reproducible peaks could be obtained from GFC-FD analysis for forthe thechromatographic chromatographic characterization of lecithin liposome-encapsulated TiO2 -PDA
Summary
Nanomaterials exhibit novel physicochemical properties that continue to promote their use in various industrial manufacturing processes. The top applications of nanomaterials in North. Coatings, electronics, food products, paints, rubber tires, and textiles [1]. Three metal oxide nanoparticles having sizes between 1 and 100 nanometers, namely titania (TiO2 ), zinc oxide (ZnO), and ceria (CeO2 ), are produced in high tonnage for use as additives in nanomaterials worldwide. TiO2 nanoparticles are used as a fine whitener in cosmetics and sunscreen products because of their brightness, high refractive index, and resistance to discoloration. Long et al reported that TiO2 nanoparticles can produce reactive oxygen species that cause many diseases including immortalized brain microglia in mice [2,3].
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