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Title: Recovering Titanium Dioxide (TiO2) after its Use to Treat Leachate for Reuse on Future Leachate Flows.
Creator: Coffman, Neil, Meeroff, Daniel E., Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: This thesis was about finding a recovery method for TiO2, using a TiO2 recovery technology, which was high enough to be economical ($10 - $15 per 1,000 gallons) to be adopted by wastewater treatment plants. When comparing recovery technologies, the top three which were investigated further through experimentation were a centrifuge, sedimentation tank, and microfilter membrane. Upon experimentation and research, the TiO2 recovery efficiencies of these technologies were 99.5%, 92.5%, and 96.3%,...
Show moreThis thesis was about finding a recovery method for TiO2, using a TiO2 recovery technology, which was high enough to be economical ($10 - $15 per 1,000 gallons) to be adopted by wastewater treatment plants. When comparing recovery technologies, the top three which were investigated further through experimentation were a centrifuge, sedimentation tank, and microfilter membrane. Upon experimentation and research, the TiO2 recovery efficiencies of these technologies were 99.5%, 92.5%, and 96.3%, respectively. When doing economic analysis on these technologies comparing TiO2 efficiencies and capital and operational costs, the centrifuge was the most preferred economic option. Also, its cost did were in the economical range ($10 - $15/1,000 gallons) which makes even this technology economical. Besides that, important and valuable information about TiO2: settling behavior, particle size and zeta potential, interactions with COD, and filter operations (particle characterization) were discovered for future research and future testing on this issue.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00004490, http://purl.flvc.org/fau/fd/FA00004490
Subject Headings: Environmental chemistry, Environmental engineering, Fluid dynamics, Microfluidic devices, Sewage disposal plants -- Management, Solution (Chemistry), Titanium dioxide -- Environmental aspects, Titanium dioxide -- Industrial applications
Format: Document (PDF)

Title: Climate change impacts on the secondary metabolite production in Caribbean coral reef sponges.
Creator: Vansach, Tifanie, Duckworth, Alan R., Hard, M., Stubler, A., West, Lyndon, Graduate College
Date Issued: 2011-04-08
PURL: http://purl.flvc.org/fcla/dt/3164802
Subject Headings: Climatic changes --Environmental aspects, Metabolism, Sponges --Caribbean Sea
Format: Document (PDF)

Title: Environmental and biogeographic factors influencing ichthyofaunal diversity: Indian River Lagoon.
Creator: Gilmore, R. G., Harbor Branch Oceanographic Institute
Date Issued: 1995
PURL: http://purl.flvc.org/FCLA/DT/3172869
Subject Headings: Indian River (Fla.: Lagoon), Fish surveys, Biodiversity, Environmental geomorphology, Biogeography
Format: Document (PDF)

Title: Acute toxicity of Tributyltin (TBT) to early life history stages of the hard shell clam, Mercenaria mercenaria.
Creator: Laughlin, R. B., Jr., Gustafson, R. G., Pendoley, Peter D., Harbor Branch Oceanographic Institute
Date Issued: 1989
PURL: http://purl.flvc.org/FCLA/DT/3333120
Subject Headings: Mercenaria mercenaria, Tributyltin, Tributyltin--Environmental aspects, Clams
Format: Document (PDF)

Title: Deep-water benthic habitat characterization and cable impact assessment for the South Florida Ocean Measurement Facility (SFOMF). Report to Naval Surface Warfare Center, Carderock Division.
Creator: Messing, Charles G., Walker, Brian K., Reed, John K., Harbor Branch Oceanographic Institute
Date Issued: 2012
PURL: http://purl.flvc.org/fau/fd/FA00007525
Subject Headings: Benthos Habitat, Fiber optic cables, Environmental impact analysis
Format: Document (PDF)

Title: Does participation in the It’s Not Easy Being Green Camp Program at the Miami Seaquarium lead to improvement in student’s knowledge of endangered animals and marine habitats as well as their attitudes towards conservation and preservation.
Creator: Scarlatelli, Summer, Meltzer, Carol, Graduate College
Date Issued: 2011-04-08
PURL: http://purl.flvc.org/fcla/dt/3164792
Subject Headings: Wildlife conservation --Florida --Public opinion, Marine resources conservation, Environmental education
Format: Document (PDF)

Title: Cultivation biology of Gracilaria tikvahiae in the United States.
Creator: Hanisak, M. Dennis, Ryther, John H.
Date Issued: 1984
PURL: http://purl.flvc.org/FCLA/DT/3333076
Subject Headings: Gracilaria, Mariculture--Environmental aspects, Marine algae culture, Seaweed
Format: Document (PDF)

Title: Behavioral Enrichment of Captive Black Bears (Ursus americanus).
Creator: Gonzalez, Jasmine, Allard, Stephanie, Earles, Julie, Wetterer, James K.
Date Issued: 2012-04-06
PURL: http://purl.flvc.org/fcla/dt/3348822
Subject Headings: Bears, Captive wild animals, Animal welfare, Environmental enrichment, Ursus americanus
Format: Document (PDF)

Title: Bioaccumulation of tributyltin: the link between environment and organism.
Creator: Laughlin, R. B., Jr., Harbor Branch Oceanographic Institute
Date Issued: 1986
PURL: http://purl.flvc.org/FCLA/DT/3351929
Subject Headings: Tributyltin, Bioaccumulation, Environment, Organisms, Tributyltin--Environmental aspects
Format: Document (PDF)

Title: Determining peat thickness in subtropical peatlands using ground penetrating radar.
Creator: McNabb, Tyler, Comas, Xavier, Sumner, David
Date Issued: 2012-04-06
PURL: http://purl.flvc.org/fcla/dt/3349032
Subject Headings: Environmental geology, Earth sciences, Natural resources, Peatlands, Stratigraphy
Format: Document (PDF)

Title: God, man, nature and Michel de Montaigne's rhetoric of human fallibility.
Creator: Brooten, Gary, Comparative Studies Program, Dorothy F. Schmidt College of Arts and Letters
Date Issued: 2008-10-24
PURL: http://purl.flvc.org/fau/fd/FADT165264p
Subject Headings: Montaigne, Michel de 1533-1592 Essais, Environmentalism, Rhetoric
Format: Set of related objects

Title: American perceptions of allergies.
Creator: Hilpert, Micheline M., Dorothy F. Schmidt College of Arts and Letters, Department of Anthropology
Abstract/Description: Allergies have taken on cultural meanings other than those offered by biomedicine. Interviews with allergic and non-allergic Americans were used to investigate the explanatory models of the lay population. This thesis uses ethnographic data to examine explanatory models of allergic conditions, highlighting metaphorical uses of allergies in American culture. The explanatory models of the subjects were contrasted to the biomedical model and the stereotypes created by the media in the United...
Show moreAllergies have taken on cultural meanings other than those offered by biomedicine. Interviews with allergic and non-allergic Americans were used to investigate the explanatory models of the lay population. This thesis uses ethnographic data to examine explanatory models of allergic conditions, highlighting metaphorical uses of allergies in American culture. The explanatory models of the subjects were contrasted to the biomedical model and the stereotypes created by the media in the United States. Important topics addressed in the analysis of the interview material were: what are the explanatory models of allergies in America, how do allergies influence the selfimage of someone with that condition, and how Americans with and without allergies perceive the allergic individual.
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Date Issued: 2011
PURL: http://purl.flvc.org/FAU/3171399
Subject Headings: Allergy, Environmental aspects, Hypersensitivity, Medical anthropology, Social medicine, Philosophy
Format: Document (PDF)

Title: A Low-Level USV Controller Incorporating an Environmental Disturbance Observer.
Creator: Diddams, Michael Albert, Dhanak, Manhar R., Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: Modeling, system identification and controller design for a 16’ catamaran is described with the objective of enhanced operation in the presence of environmental disturbances including wind, waves and current. The vehicle is fully-actuated in surge, sway and yaw degrees of freedom. Analytical and experimental system identification is carried out to create a numerical model of the vehicle. A composite system of a Multiinput multi-output Proportional-Derivative (PD) controller and a nonlinear...
Show moreModeling, system identification and controller design for a 16’ catamaran is described with the objective of enhanced operation in the presence of environmental disturbances including wind, waves and current. The vehicle is fully-actuated in surge, sway and yaw degrees of freedom. Analytical and experimental system identification is carried out to create a numerical model of the vehicle. A composite system of a Multiinput multi-output Proportional-Derivative (PD) controller and a nonlinear disturbance observer is used for station-keeping and transiting modes of operation. A waypoint transiting algorithm is developed to output heading and cross-track error from vehicle position and waypoints. A control allocation method is designed to lower azimuthing frequency and incorporate angle saturation and rate limits. Validation is achieved with improvement in simulation with the addition of the nonlinear observer.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013022
Subject Headings: Unmanned surface vehicles, Environmental disturbances, Catamarans--Design and construction
Format: Document (PDF)

Title: Chloride Diffusivity and Aging Factor Determined on Field Simulated Concrete Exposed to Seawater.
Creator: Raof, Farhad Fakheri, Presuel-Moreno, Francisco, Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: Chloride diffusivity in high performance concrete is influenced by the exposure environment, aside from the concrete mixture properties like, water to cementitious ratio (w/cm) and presence of add-on pozzolans. In this study, a set of concrete specimens (eleven-different concrete mixtures) were cast and exposed to three different environmental conditions (Tidal, Splash and Barge) in which the solution was seawater or brackish water. These exposures simulated environmental field conditions....
Show moreChloride diffusivity in high performance concrete is influenced by the exposure environment, aside from the concrete mixture properties like, water to cementitious ratio (w/cm) and presence of add-on pozzolans. In this study, a set of concrete specimens (eleven-different concrete mixtures) were cast and exposed to three different environmental conditions (Tidal, Splash and Barge) in which the solution was seawater or brackish water. These exposures simulated environmental field conditions. After the specimens had been wet cured for 32 days (on average), the specimens were exposed to three different field simulation conditions for up to 54 months. The specimens under the field simulated conditions were cored at 6, 10, 18, 30 and 54 months at four elevations and then the chloride profiles were obtained from the cores. The apparent diffusivity values for each profile were calculated based on Fick’s 2nd law. Then, the aging factor “m” was calculated by regression analysis of the diffusivity values vs. time (days) plotted in the log10-log10 scale. This was done for samples exposed to the three different exposure conditions and then the results were compared side-by-side. First, the “m” values were calculated using the exposure duration. Then, to study the effect of including the curing time on “m” value, the curing time was added to the exposure time and a new calculation and “m” value was obtained and compared with the previous results. Moreover, upon inspecting the chloride diffusivity values vs. time plots, it was observed that in some cases, a number of data points showed significantly higher or lower values in comparison with the rest of the data points. It was decided to recalculate the “m” values for these cases, and to only use selected data points instead of all data points (i.e., remove outlier data points). In terms of chloride diffusivity value, it was found that in most cases the specimens with higher water to cementitious (w/cm) ratio showed higher diffusivity, as expected. Further, the presence of pozzolans had a noticeable impact on the chloride diffusivity by decreasing the diffusion rate due to microstructure changes that occurred with time. In terms of “m” values, the result for the field simulated conditions showed a range of “m” values dependent on the specimen’s mixture composition and the elevation at which the specimens were cored. It was observed that the chloride diffusivity declined with time and after a certain amount of time (in this research, almost after 30 months) the diffusivity reduction became small and a transition in the slope of the diffusivity trend appeared in a number of cases. After the transition, the diffusivity trend reached either a plateau zone or continued with a significantly lower slope, depending on the time, composition and exposure. It was found that the specimens under tidal and splash field simulation conditions that had only fly ash in their mixtures showed higher “m” values when compared with samples that contained fly ash and silica fume or fifty percent slag.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013254
Subject Headings: Concrete--Environmental testing, Seawater, Chlorides, Diffusion, Concrete--Deterioration
Format: Document (PDF)

Title: Effects of a Disturbance Event on a Local Recreational Fishery on the East Coast of Florida.
Creator: Noble, Jessica, Baldwin, John D., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Disturbance events occur outside the normal disturbance regime of a system and can cause changes in behavior of some organisms. The 2010 cold event is an example of a disturbance event that influenced the behavior of Common Snook (Centropomus undecimalis). Common snook are euryhaline sportfish native to Florida, Texas, and the Caribbean. Florida is the northern most part of their distribution, based on the 15o C winter isotherm. They move between offshore areas during spawning season and...
Show moreDisturbance events occur outside the normal disturbance regime of a system and can cause changes in behavior of some organisms. The 2010 cold event is an example of a disturbance event that influenced the behavior of Common Snook (Centropomus undecimalis). Common snook are euryhaline sportfish native to Florida, Texas, and the Caribbean. Florida is the northern most part of their distribution, based on the 15o C winter isotherm. They move between offshore areas during spawning season and freshwater coastal rivers during non-spawning season. With the use of previously collected acoustic telemetry and biological data this project identifies the impact on population dynamics and movement near the time of the event. The goal is to understand fine scale movements and physiological conditions under normal and abnormal conditions to further inform management of the species.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013040
Subject Headings: Fishing--Florida, Snook, Centropomus undecimalis, Environmental disturbances
Format: Document (PDF)

Title: Immunoassay test strip for Microcystin-LR detection.
Creator: Xu, Jiesi., Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
Abstract/Description: Microcystin-LR (MCLR) is hepatotoxic to animals and humans with disruption of liver structure causing cytoskeletal damage, necrosis and pooling of blood in the liver, leading to large increase in liver weight. It is also a strong liver tumor promoter and protein phosphatase inhibitor. Microcysin-LR binds protein phosphatases 1 and 2A, and influences regulation of cellular protein phosphorylation. In the present study, a colloidal gold based immunoassay test strip was developed for Microcystin...
Show moreMicrocystin-LR (MCLR) is hepatotoxic to animals and humans with disruption of liver structure causing cytoskeletal damage, necrosis and pooling of blood in the liver, leading to large increase in liver weight. It is also a strong liver tumor promoter and protein phosphatase inhibitor. Microcysin-LR binds protein phosphatases 1 and 2A, and influences regulation of cellular protein phosphorylation. In the present study, a colloidal gold based immunoassay test strip was developed for Microcystin-LR detection. The detection limit was found to be 1 ng/mL. 5 nm colloidal gold test strips exhibits more efficient for detection, compared with 20 nm colloidal gold test strips. The interaction between Microcystin-LR antibody (immunoglobulin G) and colloidal gold nanoparticles was investigated by various analytical methods, including Ultraviolet/Visible (UV/VIS), Fourier Transform Infrared (FTIR) and Fluorescence spectroscopy as well as transmission electron microscopy (TEM).
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Date Issued: 2010
PURL: http://purl.flvc.org/FAU/2683532
Subject Headings: Immunoassay, Biosensors, Environmental chemistry, Cyanobacterial toxins, Drinking water, Microbiology
Format: Document (PDF)

Title: WORLD HERITAGE SITES: EXPLORING VULNERABILITY VIA ENVIRONMENTAL HAZARDS AND POLICY INITIATIVES.
Creator: Feliciano, Patricia Eileen, Mitsova, Diana, Florida Atlantic University, Department of Urban and Regional Planning, Charles E. Schmidt College of Science
Abstract/Description: This research examines historic preservation, sustainability, and environmental hazards in the face of climate change in reference to World Heritage Sites; particularly focusing on the question: Can UNESCO World Heritage Sites be conserved and protected in the face of climate change and environmental hazards? There are 1,121 World Heritage Sites listed by UNESCO and are categorized as cultural, natural, or a mix of both. The majority of these sites are at risk from different environmental...
Show moreThis research examines historic preservation, sustainability, and environmental hazards in the face of climate change in reference to World Heritage Sites; particularly focusing on the question: Can UNESCO World Heritage Sites be conserved and protected in the face of climate change and environmental hazards? There are 1,121 World Heritage Sites listed by UNESCO and are categorized as cultural, natural, or a mix of both. The majority of these sites are at risk from different environmental hazards that could threaten their existence or long-term survival; however, policy initiatives can mitigate some of these impacts. It was discovered that every continental region, with the exception of Oceania, had a site considered to be the most vulnerable. There were 27 sites deemed most vulnerable, only 2.4% of the World Heritage Sites. Most of these sites were located along the Pacific Coasts of Asia, and both North and South America.
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Date Issued: 2020
PURL: http://purl.flvc.org/fau/fd/FA00013605
Subject Headings: World Heritage sites, Environmental hazards, Historic preservation, Cultural resources management
Format: Document (PDF)

Title: UNDERSTANDING CLIMATE RESILIENCE TO ENVIRONMENTAL HAZARDS: HOW A BROWARD COUNTY COMMUNITY ASSESSMENT HELPS TO COMPLETE THE PICTURE.
Creator: Huston, Bridget, Polsky, Colin, Florida Atlantic University, Environmental Studies Program, Charles E. Schmidt College of Science
Abstract/Description: Climate patterns over the past century served to amplify the frequency and intensity of environmental hazards, including flooding, wind and heat. While indicators like SoVi and BRIC begin to characterize how people and places fair against hazards, they can be limited in scope. Through the administration of household surveys, I investigate the usefulness of such indicators by examining the roles communication, infrastructure, institutional efforts, financial independence, knowledge, mobility...
Show moreClimate patterns over the past century served to amplify the frequency and intensity of environmental hazards, including flooding, wind and heat. While indicators like SoVi and BRIC begin to characterize how people and places fair against hazards, they can be limited in scope. Through the administration of household surveys, I investigate the usefulness of such indicators by examining the roles communication, infrastructure, institutional efforts, financial independence, knowledge, mobility and social capital play in producing resilience within the Estates of Fort Lauderdale Community in Dania Beach, FL. While results confirm BRIC’s Medium-High Resilience community classification, they push beyond Census data to pinpoint underlying resilience processes. Responses indicate community classification, they push beyond Census data to pinpoint underlying resilience processes. Responses indicate that place attachment and community connectedness encourage weather-related information sharing, limited experiences and skills impede weather preparedness and response actions, and weather preparedness and response experiences are associated with less evacuation than expected. Findings prove to be richer and more policy and program actionable.
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Date Issued: 2020
PURL: http://purl.flvc.org/fau/fd/FA00013474
Subject Headings: Environmental hazards, Climate, Household surveys, Resilience, Hazard mitigation
Format: Document (PDF)

Title: Sanitary sewer evaluation of inflow/infiltration reduction techniques.
Creator: VanAllen, Geoffrey Trent, Bloetscher, Frederick, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Substantial savings in operations can be achieved by reducing the amount of wastewater that must be pumped and treated. Utilities have long dealt with the infiltration and inflow (I and I) issues in their system by televising their pipes and identifying leak points, but this primarily addresses only the infiltration part of “I and I.” Inflow, which creates hydraulic issues during rain events, leads to sanitary sewer overflows and can subject the utility to fines from regulatory agencies. As a...
Show moreSubstantial savings in operations can be achieved by reducing the amount of wastewater that must be pumped and treated. Utilities have long dealt with the infiltration and inflow (I and I) issues in their system by televising their pipes and identifying leak points, but this primarily addresses only the infiltration part of “I and I.” Inflow, which creates hydraulic issues during rain events, leads to sanitary sewer overflows and can subject the utility to fines from regulatory agencies. As a result, dealing with the inflow portion of I and I is needed. The goal of this thesis is to differentiate inflow and infiltration from baseflow and to determine the effectiveness of different methods used to reduce inflow and infiltration in sanitary sewer lines. An analysis was conducted on the benefits and cost effectiveness of different inflow/infiltration approaches (slip-lining sewer lines, stormwater manhole inserts, replacing sewer lines, smoke testing, etc.) and cost savings municipalities can expect to receive from each.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00004416, http://purl.flvc.org/fau/fd/FA00004416
Subject Headings: Environmental engineering, Sanitary engineering, Sewerage -- Maintenance and repair
Format: Document (PDF)

Title: PHOSPHORUS SEQUESTRATION AND BIOREMEDIATION: PHOSPHORUS-31 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY.
Creator: Duersch, Bobby G., Louda, J. William, Florida Atlantic University, Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science
Abstract/Description: Eutrophication is an increase in primary plant nutrients (Nitrogen [N] and Phosphorus [P]) in oceans, estuaries and lakes. The consequences of eutrophication are harmful algal blooms (HABs), resulting in algal toxin production and the depletion of oxygen as the extensive biomass decays. P is often the limiting nutrient and is viewed as a significant environmental problem. Most of the excess P that enters aquatic ecosystems originates from anthropogenic sources such as fertilizers, sewage,...
Show moreEutrophication is an increase in primary plant nutrients (Nitrogen [N] and Phosphorus [P]) in oceans, estuaries and lakes. The consequences of eutrophication are harmful algal blooms (HABs), resulting in algal toxin production and the depletion of oxygen as the extensive biomass decays. P is often the limiting nutrient and is viewed as a significant environmental problem. Most of the excess P that enters aquatic ecosystems originates from anthropogenic sources such as fertilizers, sewage, animal wastes, compost, crop residues, and wastewater. Over time, one of the main reservoirs of P becomes organic P (Po). We investigated the chemical nature and dynamics of P in cyanobacteria, horse manure, stormwater treatment areas, and rice fields. To better understand the chemical nature of P, the identification of specific P compounds was required, which was achieved through 31P nuclear magnetic resonance (NMR) spectroscopy. We investigated how paramagnetic metals and quadrupolar nuclei cause severe line broadening, peak shifts, and decreased the signal to noise ratio. Results revealed that certain Po forms are readily bioavailable to Microcystis aeruginosa. Additionally, the potential heterotrophic use of the organic portion (e.g., glucose, glycerol) of these P compounds are indicated for the growth and persistence of Microcystis aeruginosa. We showed that the cultivation of rice (Oryza sativa L.) had been found to effectively reduce P from agrarian soil and water through plant uptake and, therefore, minimizing downstream eutrophication. Soil, water, sugarcane, and rice plants at two different stages were analyzed for twelve different elements. Finally, we examined how a “relic” agrarian ditch in Stormwater Treatment Area 1 East (STA-1E) can be used for the retention and sequestration of P and other nutrients. The STAs were established to capture P from agricultural and other sources before reaching the Everglades. Retained P is primarily stored in the wetland soils and sediments, generated through a collection of interrelated physical, chemical, and biological processes.
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Date Issued: 2020
PURL: http://purl.flvc.org/fau/fd/FA00013594
Subject Headings: Nuclear magnetic resonance spectroscopy, Eutrophication, Phosphorus--Environmental aspects, Bioremediation
Format: Document (PDF)

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