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Full-Text Articles in Engineering

Hybrid Anion Exchange Nanotechnology (Haix-Nano) For Concurrent Trace Contaminant Removal With Partial Desalination: Laboratory And Field-Scale Investigations, Michael Scott German Jan 2017

Hybrid Anion Exchange Nanotechnology (Haix-Nano) For Concurrent Trace Contaminant Removal With Partial Desalination: Laboratory And Field-Scale Investigations, Michael Scott German

Theses and Dissertations

Millions of people across the Indian subcontinent are at risk of chronic exposure to arsenic and fluoride in aquifers with excess TDS (>500 mg/L). Hybrid anion exchange resins with nanoparticles of zirconium oxide (HAIX-NanoZr) were created for effective fluoride removal; zirconium oxide selectively bound fluoride, silica, and phosphate. The zeta potential of HAIX-NanoZr was directly correlated to the fluoride removal capacity. Thus, to increase fluoride capacity and achieve partial desalination concurrently, a weak acid cation (WAC) exchange pretreatment was used to lower alkalinity, hardness, pH, and TDS. Consistent partial desalination (~50%) occurred in proportion to influent alkalinity and hardness ...


Chloride Migration Variability In Reinforced Concrete Highway Structures In Pennsylvania, Connor Kane Bradley Jan 2017

Chloride Migration Variability In Reinforced Concrete Highway Structures In Pennsylvania, Connor Kane Bradley

Theses and Dissertations

To assess the potential design life for reinforced concrete highway infrastructure in the Northeastern United States, the resistance to corrosion must be known. Reinforced concrete structures in both cold and marine environments are exposed to chloride, an ion with the potential to migrate through concrete and corrode steel. Chloride content can be assessed relative to the chloride migration coefficient determined at an age of 28-days using methods defined in NT Build 492. This approach is a departure from traditional rapid chloride permeability testing methods used for qualification of concrete mix designs by state departments of transportation. To investigate the impact ...


Investigation Of Indoor Air Pollution And Volatile Organic Compounds Present In Hospitals And Their Treatment Via Photocatalytic Oxidation, Michael John Celente Jan 2017

Investigation Of Indoor Air Pollution And Volatile Organic Compounds Present In Hospitals And Their Treatment Via Photocatalytic Oxidation, Michael John Celente

Theses and Dissertations

While preexisting research regarding cigarette smoke, carbon monoxide poisoning, dust/allergens and other air pollutants exits, studying volatile organic compound (VOC) contamination indoors is a relatively recent endeavor. While certain VOCs are considered carcinogens with known detrimental health effects, new research involves investigating VOC sources, contaminant concentration in ambient indoor air and possible treatment technologies. This paper will not only detail different types of air pollutants, their sources, and health effects, but also delve deeper into VOC contamination in health related facilities (mainly hospitals) and address possible treatment methods such as photocatalytic (PCO) oxidation. Particulate matter, VOCs, biological contaminants, and ...


Real Time Quantification Of Activated Carbon Adsorption Of Butanol And Evaluation Of Influencing Adsorbent Characteristics, Dylan Friedgen-Veitch Jan 2017

Real Time Quantification Of Activated Carbon Adsorption Of Butanol And Evaluation Of Influencing Adsorbent Characteristics, Dylan Friedgen-Veitch

Theses and Dissertations

This paper uses a real-time data collection technique to analyze VOC adsorption onto activated carbon. Specifically, butyl alcohol is run through a column of extruded or granular activated carbon until it reaches an equilibrium concentration. These results are measured by a Photo-ionization Detector (PID) and reported to a computer for easy processing. Twenty-one total types of carbon were tested for capacity and time to breakthrough, with breakthrough being designated as 350 ppm as reported by the PID. Upon analyzing results of these tests, it is confirmed that surface area is proportional to adsorption capacity. It is also found that density ...