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Carbon-Nzvi Nanocomposites For Dechlorination Of Halogenated Hydrocarbons, Jing Cheng
Carbon-Nzvi Nanocomposites For Dechlorination Of Halogenated Hydrocarbons, Jing Cheng
Electronic Thesis and Dissertation Repository
A family of hybrid nanocarbon/nanoiron composites has been developed with the aim to carry out simultaneous adsorption and dechlorination of chlorinated hydrocarbons from aqueous solutions. Several methodologies for the synthesis of these materials are evaluated in terms of their adsorption capacities and dechlorination activities. Detailed spectroscopic and microscopy studies indicate that the adsorption ability of the carbonaceous support is greatly improved after acid oxidization, attributed to the formation of oxygenated functional groups on their surfaces. When iron nanoparticles are incorporated on the composites, the materials show a much higher trichloroethylene (TCE) removal efficiency compared to bare metallic nanoiron particles or …
Simulation Of Mobility And Retention Of Selected Engineered Nanoparticles Beneath Landfills, Shumsun N. Siddique
Simulation Of Mobility And Retention Of Selected Engineered Nanoparticles Beneath Landfills, Shumsun N. Siddique
Electronic Thesis and Dissertation Repository
Engineered Nanoparticles (ENPs) have generated significant public and scientific excitement due to their unique physical, chemical, and electrical properties which has led to their application in a wide variety of industries. Landfills are a likely disposal site for ENPs at the end of their useful life, either encapsulated in a product as discrete nanoparticles or in nanoparticle agglomerates. Most countries and jurisdictions have landfill design regulations to provide an effective impermeable barrier between a landfill and soil/groundwater, however, landfills are still of concern due to the potential threat to groundwater resources. This study assesses the fate of selected ENPs (multi-walled …