Tracking silver, gold, and titanium dioxide nanoparticles through drinking water systems by single particle - inductively coupled plasma - mass spectrometry

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Donovan, Ariel Renee
Missouri University of Science and Technology
Drinking water treatment; Nanoparticle removal; Nanoparticles; Single particle ICP-MS; Drinking water treatment; Nanoparticle removal; Nanoparticles; Single particle ICP-MS; Analytical Chemistry; Environmental Sciences; Nanoscience and Nanotechnology
thesis / dissertation description
"Single particle (SP)-ICP-MS methods were developed to characterize and quantify Ti-containing, titanium dioxide, silver, and gold NP concentration, size, size distribution and dissolved metal element concentration in surface water and treated drinking water. The effectiveness of conventional drinking water treatments (including lime softening, alum coagulation, filtration, and disinfection) to remove NPs from surface water was evaluated using six-gang stirrer jar test simulations. Six-gang stirrers were used to simulate drinking water treatments including lime softening, alum coagulation, powdered activated carbon sorption, filtration, and disinfection by free chlorine. Lime softening effectively removed most nanoparticles added. Source and drinking waters from three large drinking water treatment facilities were collected and analyzed by the SP-ICP-MS methods. Ti-containing particles and dissolved Ti were present in the river water samples, but Ag and Au were not present. The facilities were able to effectively remove most of the Ti-containing particles found in the source water."--Abstract, page iv.