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Evaluation Of Voc Degradation In Photo-Catalytic Air Reactors: Tio2 Immobilization, Energy Efficiency And Kinetic Modeling, Cristina S. Lugo Vega 2016 The University of Western Ontario

Evaluation Of Voc Degradation In Photo-Catalytic Air Reactors: Tio2 Immobilization, Energy Efficiency And Kinetic Modeling, Cristina S. Lugo Vega

Electronic Thesis and Dissertation Repository

The high VOC emissions from anthropogenic sources are detrimental to both the environment and humans, contributing with ground-level ozone and particle matter formation. Heterogeneous photocatalysis provides significant potential for VOC degradation. However, the approaches to be used for photocatalyst immobilization in scaled and highly efficient photoreactors are still not well established. Furthermore, there is a lack of reported photonic efficiencies and a shortage of required methods to establish these efficiencies.

To address these issues, this PhD Dissertation reports the study of photonic efficiencies, TiO2 immobilization on a stainless steel mesh and kinetic models in a scaled-up Photo-CREC-Air Reactor. Acetone ...


Automated Control Flaw Generation Procedure: Cheakamus Dam Case Study, Bogdan Pavlovic 2016 The University of Western Ontario

Automated Control Flaw Generation Procedure: Cheakamus Dam Case Study, Bogdan Pavlovic

Electronic Thesis and Dissertation Repository

This thesis deals with the problem of aging hydropower infrastructure systems and system components, a problem that is very common across Canada. Flaws of common risk analysis methods are noted, and the need for new risk analysis approaches is identified. System dynamics simulation method is introduced as an implementation mechanism for the System Theoretic Process Analysis (STPA). STPA and its adaptation to complex hydropower systems are explained thoroughly. Fuzzy logic is used to model operator’s decision making. The main objectives of the research include the development of an automated generic approach that implements STPA and fuzzy logic for the ...


Metadata For Describing Water Models, Mohamed M. Morsy, Jonathan L. Goodall, Christina Bandaragoda, Anthony M. Castronova, Jane Greenberg 2016 University of Virginia

Metadata For Describing Water Models, Mohamed M. Morsy, Jonathan L. Goodall, Christina Bandaragoda, Anthony M. Castronova, Jane Greenberg

Anthony Castronova

Computer models are widely used in hydrology and water resources management. A large variety of models exist, each tailored to address specific challenges related to hydrologic science and water resources management. When scientists and engineers apply one of these models to address a specific question, they must devote significant effort to set up, calibrate, and evaluate that model instance built for some place and time. In many cases, there is a benefit to sharing these computer models and associated datasets with the broader scientific community. Core to model reuse in any context is metadata describing the model. A standardized metadata ...


A Life Cycle Assessment Of A Uranium Mine In Namibia, Janine Lambert 2016 University of South Florida

A Life Cycle Assessment Of A Uranium Mine In Namibia, Janine Lambert

Graduate Theses and Dissertations

Uranium mining and nuclear power is a controversial topic as of late, especially in light of the recent Fukushima event. Although the actual use of nuclear fuel has minimal environmental impact, its issues come at the very beginning and end of the fuel’s life cycle in both the mining and fuel disposal process. This paper focuses on a life cycle analysis (LCA) of uranium mine in the desert nation of Namibia in Southern Africa. The goal of this LCA is to evaluate the environmental effects of uranium mining. The LCA focuses on water and energy embodiment such that they ...


Impact Of Sludge Layer Geometry On The Hydraulic Performance Of A Waste Stabilization Pond, Faissal Romaric Ouedraogo 2016 University of South Florida

Impact Of Sludge Layer Geometry On The Hydraulic Performance Of A Waste Stabilization Pond, Faissal Romaric Ouedraogo

Graduate Theses and Dissertations

Improving the hydraulic performance of waste stabilization ponds (WSPs) is an important management strategy to not only ensure protection of public health and the environment, but also to maximize the potential reuse of valuable resources found in the treated effluent. To reuse effluent from WSPs, a better understanding of the factors that impact the hydraulic performance of the system is needed. One major factor determining the hydraulic performance of a WSP is sludge accumulation, which alters the volume of the pond.

In this study, computational fluid dynamics (CFD) analysis was applied to investigate the impact of sludge layer geometry on ...


Wpływ Prędkości I Kierunku Wiatru Na Jakość Powietrza W Krakowie, Robert Oleniacz, Marek Bogacki, Adriana Szulecka, Mateusz Rzeszutek, Marian Mazur 2016 AGH University o Science and Technology

Wpływ Prędkości I Kierunku Wiatru Na Jakość Powietrza W Krakowie, Robert Oleniacz, Marek Bogacki, Adriana Szulecka, Mateusz Rzeszutek, Marian Mazur

Robert Oleniacz

The paper discusses the role of wind speed and direction in shaping the levels of pollutant concentrations in the air in Krakow. For this purpose, the hourly averaged measurements of meteorological parameters and concentrations of selected air pollutants (PM10, PM2,5, NOx, NO2, SO2, CO, O3, and C6H6) derived from the period of 2014-2015 and recorded within the area of Krakow city were used, with the differentiation associated with the type and location of measuring stations. Impact assessment of the meteorological parameters on air pollutant concentrations was determined with a nonparametric Spearman’s rank correlation coefficient values and on the ...


Przykład Wykorzystania Próbników Pasywnych Do Oceny Przestrzennego Zróżnicowania Stężeń Zanieczyszczeń W Powietrzu Miejskim, Paulina Bździuch, Angelika Zemełka, Kamil Kozieł, Joanna Żołyniak, Ewelina Bączek, Barbara Rososińska, Robert Oleniacz, Marek Bogacki 2016 AGH University o Science and Technology

Przykład Wykorzystania Próbników Pasywnych Do Oceny Przestrzennego Zróżnicowania Stężeń Zanieczyszczeń W Powietrzu Miejskim, Paulina Bździuch, Angelika Zemełka, Kamil Kozieł, Joanna Żołyniak, Ewelina Bączek, Barbara Rososińska, Robert Oleniacz, Marek Bogacki

Robert Oleniacz

The paper presents the estimation of the spatial differentiation of selected gaseous pollutant concentrations in urban air using measurement results performed with the passive method. The research was conducted in the city of Sucha Beskidzka in the winter season (2014/2015) and in the city of Krakow in the summer season (2015). Analysis comprised three major air pollutants for which it was possible to use the passive samplers – nitrogen dioxide (NO2), sulfur dioxide (SO2), and additionaly benzene. Exposure time of passive samplers lasted one month. In Sucha Beskidzka and Krakow respectively two and three measurement series of NO2 and SO2 ...


Effect Of Pet Wrapping On Shear Performance Of Corroded Reinforced Concrete Columns, Dawei Zhang, Yuxi Zhao, Weiliang Jin, Tamon Ueda 2016 Zhejiang University

Effect Of Pet Wrapping On Shear Performance Of Corroded Reinforced Concrete Columns, Dawei Zhang, Yuxi Zhao, Weiliang Jin, Tamon Ueda

International Conference on Durability of Concrete Structures

In this paper, an experimental study is presented on the influence of PET warping on shear performance, such as diagonal shear cracking load, peak load, and energy dissipation of RC columns with stirrup corrosion before strengthening. The experimental program involved an electrochemical process to accelerate the migration of chlorides from an external electrolyte into the tested columns, a wetting–drying cycle process with a controlled current to speed up the corrosion of the stirrup in the tested columns, the strengthening of corroded columns with PET warping, and a pseudostatic test to determine the shear capacity of the tested beams. The ...


Identification Of Groundwater Discharge Along The Shoreline Of Large Inland Lakes In Southern Ontario, Tao Ji 2016 The University of Western Ontario

Identification Of Groundwater Discharge Along The Shoreline Of Large Inland Lakes In Southern Ontario, Tao Ji

Electronic Thesis and Dissertation Repository

Groundwater discharge may be an important pathway for delivering pollutants into nearshore waters of large inland lakes, including the Great Lakes and Lake Simcoe in Southern Ontario, Canada. This pathway however is poorly understood and quantified. While field methods for evaluating groundwater discharge to surface waters in tributary and marine settings have been widely applied and are well tested, there are limited field methods available for evaluating groundwater discharge to large inland lakes, particularly at the regional scale (i.e. 5-100 km). The objective of this thesis was to evaluate suitable field methods for quantifying groundwater discharge into large inland ...


Aqueous Photochemistry Of Glyoxylic Acid, Alexis J. Eugene, Sha-Sha Xia, Marcelo I. Guzman 2016 University of Kentucky

Aqueous Photochemistry Of Glyoxylic Acid, Alexis J. Eugene, Sha-Sha Xia, Marcelo I. Guzman

Chemistry Faculty Publications

Aerosols affect climate change, the energy balance of the atmosphere, and public health due to their variable chemical composition, size, and shape. While the formation of secondary organic aerosols (SOA) from gas phase precursors is relatively well understood, studying aqueous chemical reactions contributing to the total SOA budget is the current focus of major attention. Field measurements have revealed that mono-, di-, and oxo-carboxylic acids are abundant species present in SOA and atmospheric waters. This work explores the fate of one of these 2-oxocarboxylic acids, glyoxylic acid, which can photogenerate reactive species under solar irradiation. Additionally, the dark thermal aging ...


Carbon Nanotubes Affect The Toxicity Of Cuo Nanoparticles To Denitrification In Marine Sediments By Altering Cellular Internalization Of Nanoparticle, Xiong Zheng, Yinglong Su, Yinguang Chen, Rui Wan, Mu Li, Haining Huang, Xu Li 2016 Tongji University, Shanghai, China

Carbon Nanotubes Affect The Toxicity Of Cuo Nanoparticles To Denitrification In Marine Sediments By Altering Cellular Internalization Of Nanoparticle, Xiong Zheng, Yinglong Su, Yinguang Chen, Rui Wan, Mu Li, Haining Huang, Xu Li

Civil Engineering Faculty Publications

Denitrification is an important pathway for nitrate transformation in marine sediments, and this process has been observed to be negatively affected by engineered nanomaterials. However, previous studies only focused on the potential effect of a certain type of nanomaterial on microbial denitrification. Here we show that the toxicity of CuO nanoparticles (NPs) to denitrification in marine sediments is highly affected by the presence of carbon nanotubes (CNTs). It was found that the removal efficiency of total NOX-N (NO3-N and NO2-N) in the presence of CuO NPs was only 62.3%, but it increased to ...


Wpływ Rodzaju Spalanych Paliw I Działań Termomodernizacyjnych Na Oddziaływanie Budynku Jednorodzinnego Na Jakość Powietrza, Robert Oleniacz, Magdalena Kasietczuk, Magdalena Kępka 2016 AGH University o Science and Technology

Wpływ Rodzaju Spalanych Paliw I Działań Termomodernizacyjnych Na Oddziaływanie Budynku Jednorodzinnego Na Jakość Powietrza, Robert Oleniacz, Magdalena Kasietczuk, Magdalena Kępka

Robert Oleniacz

The paper discusses the overall impact of the type of burned fuel and thermal renovation actions within a detached house on the emission of some pollutants into the air. It shows also an example of the assessment of the impact on air quality for residential building with a heated area of 185 m2, which came into use in 1997, for three periods of its operation with different way of heating and preparing domestic hot water, and heat loss to the environment (due to the changes made in this range by thermal renovation). This assessment takes into account the maximum and ...


Ocena Ekspozycji Budynku Wielorodzinnego Na Wpływ Emisji Benzenu Ze Stacji Paliw Oraz Transportu Drogowego W Okresie Letnim, Marek Bogacki, Robert Oleniacz, Adriana Szulecka 2016 AGH University o Science and Technology

Ocena Ekspozycji Budynku Wielorodzinnego Na Wpływ Emisji Benzenu Ze Stacji Paliw Oraz Transportu Drogowego W Okresie Letnim, Marek Bogacki, Robert Oleniacz, Adriana Szulecka

Robert Oleniacz

Concentration level of benzene in urban air in the summer is determined primarily (excluding the industrial areas) by emissions originating from road vehicles and fuel stations. The aim of the study was to assess the exposure of a multifamily, five-storey residential building located in the Krakow city centre to the influence of benzene emitted from a nearby fuel station and road transport. Determination of the spatial distribution of benzene concentrations in the vicinity of evaluated building was conducted using measurement procedure with 10 passive samplers exposed over a period of 32 days at the turn of May and June 2015 ...


Zastosowanie Systemu Modelowania Aermod W Obliczeniach Dyspersji Zanieczyszczeń Powietrza W Warunkach Polskich, Mateusz Rzeszutek, Robert Oleniacz 2016 AGH University of Science and Technology

Zastosowanie Systemu Modelowania Aermod W Obliczeniach Dyspersji Zanieczyszczeń Powietrza W Warunkach Polskich, Mateusz Rzeszutek, Robert Oleniacz

Robert Oleniacz

The study assesses the possibility of implementing the AERMOD modeling system on Polish territory. Attention was drawn to the availability and the quality of meteorological and spatial data required for impact assessment of the emission sources on air quality. The potentiality of application of individual modeling system tools was discussed and the alternative data preparation methods were defined. The effects of application of the modeling system were exemplified by air quality impact assessment conducted for the existing facility – Sewage Sludge Incineration (SSI) Plant in Lodz – with different sources of meteorological data assumed. Discussion of the analysis results points to consequences ...


Potential For Biofuel Production From Algae Based Wastewater Treatment In California: Can Algal Biofuels Be Cost-Competitive With Traditional Petroleum Based Diesel?, Amanda Rupiper 2016 Master's Student

Potential For Biofuel Production From Algae Based Wastewater Treatment In California: Can Algal Biofuels Be Cost-Competitive With Traditional Petroleum Based Diesel?, Amanda Rupiper

Master's Projects

Neither the use of algae to clean wastewater, nor the use of photosynthetic organisms to generate biodiesel, are new concepts on their own. By combining these two processes, algal-based wastewater treatment with algal biofuel production, additional benefits can be derived, among which could be a cost-savings. In California the average estimated base production cost per gallon for algal biodiesel is $5.98/gallon. Compared to the adjusted production cost of petroleum-based diesel of $1.53/gallon, biodiesel is not cost-competitive. Coupling wastewater treatment and algal cultivation reduces the net energy use of the two processes separately and, if accounted for ...


Volatile Organic Compound (Voc) Emission During Cured-In-Place-Pipe (Cipp) Sewer Pipe Rehabilitation, Elena Bourbour Ajdari 2016 University of New Orleans

Volatile Organic Compound (Voc) Emission During Cured-In-Place-Pipe (Cipp) Sewer Pipe Rehabilitation, Elena Bourbour Ajdari

University of New Orleans Theses and Dissertations

The maintenance or replacement of deteriorated pipes and culverts is a constant and significant concern for municipalities and transportation agencies in the United States (Donaldson and Wallingford, 2010). Trenchless technologies and especially the Cured-in-place pipe (CIPP) method have become increasingly common ways to preserve infrastructures owing to their feasibility, cost-effectiveness, and fewer social impacts (Jung and Sinha, 2007). Therefore, there is a growing need to understand the direct and indirect effects of pipeline rehabilitation activities on the environment. Nearly all past CIPP studies have focused on its mechanical properties, and its environmental impacts are poorly investigated and documented (Allouche et ...


Odor Monitoring At The New Orleans East Bank Wastewater Treatment Plant, Felicia R. Figinsky 2016 University of New Orleans, New Orleans

Odor Monitoring At The New Orleans East Bank Wastewater Treatment Plant, Felicia R. Figinsky

University of New Orleans Theses and Dissertations

Hydrogen Sulfide is a corrosive, odorous, and hazardous gas that can cause issues for wastewater collection systems and treatment plants. When evaluating hydrogen sulfide concentrations it is important to consider the source, odor causing mechanism, and its level of toxicity. In this study, continuous hydrogen sulfide monitoring was performed for 8 locations within the New Orleans East Bank Wastewater Treatment Plant for a span of 5 months. Hot spots within the plant are located and data analysis is performed based on daily and hourly averages of hydrogen sulfide concentrations. The data was configured to show peak hydrogen sulfide concentrations at ...


A Systems Approach To Modelling The Effects Of Climate Change On Agroforestry: A Case Study In Western Tanzania, Elaine M. Samuel 2016 The University of Western Ontario

A Systems Approach To Modelling The Effects Of Climate Change On Agroforestry: A Case Study In Western Tanzania, Elaine M. Samuel

Electronic Thesis and Dissertation Repository

Climate change is anticipated to have significant effects on agricultural production in sub-Saharan Africa as the magnitude of weather events increase in severity. Smallholder farmers in western Tanzania are potentially vulnerable to climate change impact as crops rely on precipitation as the only source of water. It is prudent to evaluate different modes of agricultural adaptations, such as agroforestry, that these farmers can easily adopt to improve their resiliency to the effects of climate change. System dynamics modelling is a cost-effective tool to simulate the long-term behaviour of agroforestry systems under future climate conditions. Water, Nutrient, and Light Capture in ...


Comparing Mode Shares For Non-Residential Destinations In Urban And Suburban Environments, Tasnia Subrin 2016 Portland State University

Comparing Mode Shares For Non-Residential Destinations In Urban And Suburban Environments, Tasnia Subrin

Student Research Symposium

To ensure facility for multimodal transportation is one of the most important concerns in today’s transportation sector, with initiatives being taken to make multimodal transportation popular. The built environment variables have a strong relationship with transportation mode choice, but whether that relationship holds true in urban and suburban neighborhoods in the same manner has not been considered. Using data for three non-residential land uses, this research explores whether the built environment variables in suburban areas influences mode share like it does in urban areas. We used survey data conducted at the establishments regarding respondents’ travel characteristics from a previous ...


Microbial Degradation Of Sulfonamide Antibiotics, Rachel Levine 2016 University of Nebraska-Lincoln

Microbial Degradation Of Sulfonamide Antibiotics, Rachel Levine

Civil Engineering Theses, Dissertations, and Student Research

Certain microbes can transform antibiotics in the environment. However, little is known about the identity of these microbes and their antibiotic biotransformation processes. The objectives of this study were to (1) isolate bacterial strains capable of transforming antibiotics, (2) determine the biotransformation kinetics of antibiotics, (3) characterize the effects of background carbons on the biotransformation kinetics, and (4) identify biotransformation products under various environmental conditions. Sulfadiazine (SDZ) was used as the model antibiotic in this study due to its frequent occurrence in livestock wastes. Surface soil from a cattle feedlot was collected to enrich potential SDZ degrading bacteria. A mixed ...


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