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Full-Text Articles in Transport Phenomena
Synthesis Of Copper Oxide Nanoparticles In Droplet Flow Reactors, Christopher Reilly
Synthesis Of Copper Oxide Nanoparticles In Droplet Flow Reactors, Christopher Reilly
Honors Theses and Capstones
Synthesis of metal oxide nanoparticles within droplet flow reactors is advantageous over batch synthesis due to the elimination of concentration and temperature gradients inside the reactor and prevention of reactor fouling. We present results on the synthesis of copper oxide nanoparticles using aqueous droplets of copper acetate and acetic acid inside a bulk stream of sodium hydroxide in 1-octanol. Varying the copper acetate, acetic acid, and sodium hydroxide concentration resulted in needle-like and plate-like nanoparticles of varying sizes. The rate of mass transfer from the bulk to the droplet phase was found to increase with flow rate and addition of …
The Effects Of Carboxylic Acids In Aluminum Anodizing, Abby E. Koczera
The Effects Of Carboxylic Acids In Aluminum Anodizing, Abby E. Koczera
Honors Theses and Capstones
Hard-anodized alumina coatings were formed in sulfuric acid at low temperature and high current density in the presence of carboxylic acid additives. Citric acid, trimesic acid, mellitic acid and ethylenediaminetetraacetic acid (EDTA) were utilized in varying concentrations. The additives were chosen for their capacity to form complexes with tri-valent aluminum and hence impart chemical stability to the coatings. The coatings were sealed in boiling water, and corrosion resistance was observed in a high pH solution of potassium hydroxide. The coatings were examined using scanning electron microscopy (SEM) to assess coating thickness and pore dimensions. Thicker coatings were produced when the …
Octanol/Water Partitioning Coefficients Of Pcb Mixtures For Environmental Fate And Transport, Phylicia Cicilio
Octanol/Water Partitioning Coefficients Of Pcb Mixtures For Environmental Fate And Transport, Phylicia Cicilio
Honors Theses and Capstones
Polychlorinated biphenyls (PCBs) are a human and environmental toxin introduced to the environment from the 1920’s to the 1970’s from manufacturing items such as transformers and capacitors. PCBs remain in the environment today due to their low water solubility and resistance to chemical reaction. Due to their properties PCBs bioaccumulate in the environment and pose health risks to animals and humans, as they are deemed a probable carcinogen by the EPA. Octanol-water partitioning coefficients are a means of measuring how PCBs will travel in the environment, either partitioning to water or into organic carbon. Octanol-water partitioning coefficients will be determined …