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Title: Temperature effects on baralyme, sodasorb, and lithium hydroxide.
Creator: Wang, Tsen C., Harbor Branch Oceanographic Institute
Date Issued: 1975
PURL: http://purl.flvc.org/FCLA/DT/3318942
Subject Headings: Carbon dioxide removal, Alkali metal hydroxides, Lithium hydroxide, Alkali metals
Format: Document (PDF)

Title: The contribution of microorganisms to particulate carbon and nitrogen in surface waters of the Sargasso Sea near Bermuda.
Creator: Caron, D.A., Dam, H. G., Kremer, P., Lessard, E. J., Madin, L. P., Malone, Tom C., Napp, J. M., Peele, E. R., Roman, M. R., Youngbluth, Marsh J.
Date Issued: 1995
PURL: http://purl.flvc.org/FCLA/DT/3331907
Subject Headings: Carbon, Nitrogen, Seawater--Composition, Sargasso Sea, Microorganisms
Format: Document (PDF)

Title: Spatial and temporal changes in the partitioning of organic carbon in the plankton community of the Sargasso Sea off Bermuda.
Creator: Roman, M. R., Caron, D. A., Kremer, P., Lessard, E. J., Madin, L. P., Malone, Tom C., Napp, J. M., Peele, E. R., Youngbluth, Marsh J.
Date Issued: 1995
PURL: http://purl.flvc.org/FCLA/DT/3331905
Subject Headings: Plankton, Plankton--Vertical distribution, Carbon, Sargasso Sea
Format: Document (PDF)

Title: Water content, organic content, and carbon and nitrogen composition of medusae from the northeast Pacific.
Creator: Larson, R. J., Harbor Branch Oceanographic Institute
Date Issued: 1986
PURL: http://purl.flvc.org/FCLA/DT/3353781
Subject Headings: Medusae, Biochemistry, Carbon, Nitrogen, Water, Organic and biological chemistry
Format: Document (PDF)

Title: Temporal and spatial variation in habitat characteristics of tilefish (Lopholatilus chamaeleonticeps) off the east coast of Florida.
Creator: Able, Kenneth W., Grimes, Churchill B., Jones, Robert S., Twichell, David C., Harbor Branch Oceanographic Institute
Date Issued: 1993
PURL: http://purl.flvc.org/FCLA/DT/3172857
Subject Headings: Tilefish, Marine sediments --Florida, Carbonates, Sidescan sonar, Oceanographic submersibles
Format: Document (PDF)

Title: Effects of Carbon Dioxide Levels on Growth and Pigments of Freshwater Algae.
Creator: Bermudez, Jeanne, Louda, J. W., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
Abstract/Description: This project was designed to investigate the effects of carbon dioxide (CO2) levels on the growth and pigment ratios (chemotaxonomy) of freshwater algal species typical to the south Florida surface waters. Green algae, diatoms, and cyanobacteria were cultured under 400 or 800 ppm CO3 in air for several weeks. Growth monitoring used a cell counter, hemocytometer, and chlorophyll fluorescence. Pigments were analyzed using HPLC-PDA. Experiments with certified CO2 concentrations (400, 600, 800,...
Show moreThis project was designed to investigate the effects of carbon dioxide (CO2) levels on the growth and pigment ratios (chemotaxonomy) of freshwater algal species typical to the south Florida surface waters. Green algae, diatoms, and cyanobacteria were cultured under 400 or 800 ppm CO3 in air for several weeks. Growth monitoring used a cell counter, hemocytometer, and chlorophyll fluorescence. Pigments were analyzed using HPLC-PDA. Experiments with certified CO2 concentrations (400, 600, 800, 1200 ppm) were conducted with helium degassed ultrapure water and each of three culture media. Theoretical and experimental pH values with water matched exactly. However, each culture media proved to exhibit significant buffer capacity. Cell growth monitoring was problematic except for the cyanobacterium Microcystis aeruginosa. That species responded to increased CO2 (800 ppm) with increased growth rates as predicted. The other species gave erratic results mainly due to difficulties in obtaining valid consistent cell counts.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013170
Subject Headings: Freshwater algae--Growth, Chemotaxonomy, Carbon dioxide, Pigments (Biology)
Format: Document (PDF)

Title: Using Hydrogeophysical Methods for Investigating Carbon Dynamics in the Greater Everglades Watershed: Implications for the Spatial and Temporal Variability in Carbon Stocks and Biogenic Gas Fluxes.
Creator: McClellan, Matthew D., Comas, Xavier, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description: Peat soils store a large fraction of the global soil carbon (C) pool and comprise 95% of wetland C stocks. They also have the capability to produce and release significant amounts of greenhouse gasses (CO2, CH4) into the atmosphere. Most studies of wetland soil C and gas flux dynamics have been done in expansive peatlands in northern boreal and subarctic biomes. However, wetlands in temperate and tropical climates are vastly understudied despite accounting for more than 20% of the global...
Show morePeat soils store a large fraction of the global soil carbon (C) pool and comprise 95% of wetland C stocks. They also have the capability to produce and release significant amounts of greenhouse gasses (CO2, CH4) into the atmosphere. Most studies of wetland soil C and gas flux dynamics have been done in expansive peatlands in northern boreal and subarctic biomes. However, wetlands in temperate and tropical climates are vastly understudied despite accounting for more than 20% of the global peatland C stock and storing large amounts of biogenic gasses Although studies investigating greenhouse gas dynamics from peatlands have increased during the last decade, the spatial and temporal distribution of these gases still remains highly uncertain, mainly due to the limitations in terms of spatial and temporal resolution and invasive nature of most methods traditionally used. This thesis combines a series of field and laboratory studies at several sites in the Greater Everglades as examples to show the potential of hydrogeophysical methods to better understand: 1) the belowground C distribution and overall contribution to the global C stocks of certain wetlands (Chapter 2); and 2) the spatial and temporal variability in both C accumulation and releases from peat soil monoliths from several wetland sites in the Greater Everglades (Chapter 3 and 4). To estimate belowground C in the field, I used a combination of indirect non-invasive geophysical methods (GPR), aerial imagery, and direct measurements (coring) to estimate the contribution of subtropical depressional wetlands to the total C stock of pine flatwoods landscape at the Disney Wilderness Preserve (DWP, Orlando, FL). Three-dimensional (3D) GPR surveys were used to define the thickness of stratigraphic layers from the wetland surface to the mineral soil interface within depressional wetlands. Depth-profile cores in conjunction with C core analysis were utilized to visually confirm depths of each interface and estimate changes in soil C content with depth and were ultimately used to estimate total peat volume and C stock for each depressional wetland. Aerial photographs were used to develop a relationship between surface area and total wetland C stock, that were applied to estimate total landscape C stock of all depressional wetlands throughout the entire preserve. Additionally, low-frequency GPR surveys were conducted to image the stratigraphy underneath the peat basin of depressional wetlands to depict lithological controls on the formational processes of depressional wetlands at the DWP. Spatial and temporal variability in biogenic greenhouse gas (i.e. methane and carbon dioxide) production and release were investigated at the laboratory scale. Two 38 liter (0.5 m x 0.23 m x 0.3 m) peat monoliths from two different wetland ecosystems in central Florida (sawgrass peatland and a wet prairie) were compared in order to understand whether changes in matrix properties influence gas dynamics in a controlled environment (i.e. constant temperature). Gas content variability (i.e. build-up and release) within the peat matrix was estimated using a series of high frequency (1.2 GHz) GPR transects along each sample about three times a week. An array of gas traps (eight per sample) fitted with time-lapse cameras were also used in order to constrain GPR measurements and capture gas releases at 15-minute intervals. Gas chromatography was performed on gas samples extracted from the traps to determine CH4 and CO2 content. Also, at the lab scale, temporal variability in biogenic gas accumulation and release was investigated in a large 0.073 m3 peat monolith from the Blue Cypress Preserve in central Florida. An autonomous rail system was constructed in order to estimate gas content variability (i.e. build-up and release) within the peat matrix using a series of continuous GPR transects along the sample. This system ran virtually nonstop using high frequency (1.2 GHz) antennas. GPR measurements were again constrained with an array of gas traps (6) fitted with time-lapse cameras and gas chromatography. The aim of this study is to better constrain temporal scale, and better understand the heterogeneous nature (both in time and space) of gas releases from peat soils.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013238
Subject Headings: Greenhouse gases, Everglades (Fla.), Peatlands, Carbon, Bogenic gas
Format: Document (PDF)

Title: THE IMPACT CORROSION HAS ON THE DEGRADATION OF MECHANICAL PROPERTIES OF CARBON STEEL REBARS IN HIGH PERFORMANCE CONCRETE.
Creator: Rosa-Pagan, Angel R., Presuel-Moreno, Francisco, Florida Atlantic University, Department of Ocean and Mechanical Engineering, College of Engineering and Computer Science
Abstract/Description: A significant amount of reinforced concrete structures in the USA are reaching the design life span of 50 years. Degradation of these infrastructure due to corrosion presents an economical, safety and quality of life challenge for our society. Being able to study and determine the conditions of our infrastructure, perform maintenance before failure and predict failure before occurrence has become critical for our society and our way of life. This study was performed to add to existing...
Show moreA significant amount of reinforced concrete structures in the USA are reaching the design life span of 50 years. Degradation of these infrastructure due to corrosion presents an economical, safety and quality of life challenge for our society. Being able to study and determine the conditions of our infrastructure, perform maintenance before failure and predict failure before occurrence has become critical for our society and our way of life. This study was performed to add to existing research in the understanding of the relationships between the corrosion current of the embedded carbon steel rebars in reinforced concrete, rebar mass loss due to corrosion and the degradation of the mechanical properties of the carbon steel embedded in high performance concrete structures. The study also aimed to study the influence of different independent variables such as the chloride solution reservoir size and the concrete composition of the prepared specimens for the study. Specimens for the study were prepared by embedding three carbon steel size #4 rebars in blocks of high performing concrete with different admixture to enhance their performance against corrosion. To initiate corrosion specimens were exposed to accelerated chloride transport method (electromigration). To accelerate corrosion some samples were selected for anodic polarization and additional electromigration. After corrosion initiation, the rebars Open Circuit Potential (OCP) and corrosion current (Icorr) were periodically measured using a galvanostat device from April 2017 to August 2021. The OCP average values showed that all the rebars considered in this study were in active corrosion. Faraday’s law was used to determine the rebar calculated mass loss from the measured corrosion current and the elapse time between measurements. The rebar mass loss was in turn used to model the loss of the physical properties of the rebar (yield strength, ultimate strength, and ultimate strain) using (Vanama & Ramakrishnan, 2020) model. Analysis of these parameters results showed a direct relationship between the measured corrosion current and the calculated mass loss of the corroding rebar. The study also showed a direct relationship between the calculated mass loss of the corroding rebar and the degradation of the physical properties of the rebar.
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Date Issued: 2021
PURL: http://purl.flvc.org/fau/fd/FA00013843
Subject Headings: Corrosion, Reinforced concrete--Deterioration, Carbon steel, High strength concrete
Format: Document (PDF)

Title: DEVELOPING NOVEL ADSORBENT MATERIALS FOR CARBON DIOXIDE REMOVAL FROM ENCLOSED ENVIRONMENTS.
Creator: Ahsan, Sara, Masoud Jahandar Lashaki, Florida Atlantic University, Department of Civil, Environmental and Geomatics Engineering, College of Engineering and Computer Science
Abstract/Description: Exposure to high CO2 levels in enclosed environments may result in adverse health impacts. To provide a safe breathing environment, the exhaled gases must be removed. Currently, NASA uses a multi-bed system known as the Carbon Dioxide Removal Assembly (CDRA) for CO2 removal. The process involves cyclic adsorption-desorption using zeolite-5A molecular sieves. Owing to the presence of a wet gaseous mixture and the hydrophilic nature of zeolite-5A, the removal of CO2 and water vapor must be...
Show moreExposure to high CO2 levels in enclosed environments may result in adverse health impacts. To provide a safe breathing environment, the exhaled gases must be removed. Currently, NASA uses a multi-bed system known as the Carbon Dioxide Removal Assembly (CDRA) for CO2 removal. The process involves cyclic adsorption-desorption using zeolite-5A molecular sieves. Owing to the presence of a wet gaseous mixture and the hydrophilic nature of zeolite-5A, the removal of CO2 and water vapor must be conducted in two separate vessels, resulting in additional costs. Therefore, the objective of this study was to integrate and intensify the process utilizing amine-grafted silica. Adsorbent performance was gauged on equilibrium CO2 uptake and kinetics, activation temperature, CO2 desorption temperature, and consecutive cycling in the presence of 1 vol.% CO2 in N2 at 25 °C. Aminosilica outperformed 5A and achieved similar equilibrium CO2 uptake while exhibiting faster kinetics, and lower desorption and regeneration temperature requirements.
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Date Issued: 2021
PURL: http://purl.flvc.org/fau/fd/FA00013844
Subject Headings: Carbon dioxide, Adsorption, Air--Purification, Silica, Zeolites
Format: Document (PDF)

Title: AQUEOUS ARSENIC REMOVAL USING NOVEL CARBON ADSORBENTS THAT ARE DERIVED FROM WASTE ALGAE.
Creator: Rawal, Rishabh, Meeroff, Dan, Florida Atlantic University, Department of Civil, Environmental and Geomatics Engineering, College of Engineering and Computer Science
Abstract/Description: Human exposure to arsenic from natural as well as anthropogenic sources can lead to a detrimental impact to the nervous system, cardiovascular system and can also cause cancer. Historical agricultural runoff has led to an accumulation of arsenic in groundwater and soils around Lake Okeechobee and many golf courses in Florida. This research involved studying the removal of aqueous arsenic via adsorption using activated carbon derived from algae. Carbon derived from Sargassum removed 41.47% of...
Show moreHuman exposure to arsenic from natural as well as anthropogenic sources can lead to a detrimental impact to the nervous system, cardiovascular system and can also cause cancer. Historical agricultural runoff has led to an accumulation of arsenic in groundwater and soils around Lake Okeechobee and many golf courses in Florida. This research involved studying the removal of aqueous arsenic via adsorption using activated carbon derived from algae. Carbon derived from Sargassum removed 41.47% of arsenic after a contact time of 2 hours. Adsorbents created from blue-green algae showed essentially no arsenic removal under the same conditions. Various chemical additives were tested to improve arsenic adsorption as well. Modification of the adsorbent surface with magnesium chloride demonstrated an arsenic removal efficiency of 98.6% when added to commercial activated carbon. However, when magnesium chloride was used to modify the surface of Sargassum-derived carbon adsorbents, the arsenic removal efficiency after 2 hours was 26.7%. It is recommended to investigate other surface modification agents that can potentially improve adsorption of arsenic.
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Date Issued: 2022
PURL: http://purl.flvc.org/fau/fd/FA00014036
Subject Headings: Arsenic, Adsorption, Algae, Carbon, Activated, Groundwater--Purification--Arsenic removal
Format: Document (PDF)

Title: CORROSION MONITORING AND ANALYSIS OF REINFORCED CONCRETE: CORROSION RESISTANT ALLOYS AFTER LONG TERM EXPOSURE TO CHLORIDES.
Creator: Taylor, Redmayne, Presuel-Moreno, Francisco, Florida Atlantic University, Department of Ocean and Mechanical Engineering, College of Engineering and Computer Science
Abstract/Description: Reinforced concrete (RC) is the building block of modern architecture and industry. The failure of which is costly and dangerous. Typically made with carbon steel rebars, corrosion resistant alloys provide an alternative method of delaying failure. Stainless steels, while more expensive than carbon steels, provide excellent corrosion resistance, but less is known about the long term monitoring of corrosion activity for stainless steel than for carbon steel. This study looks at samples...
Show moreReinforced concrete (RC) is the building block of modern architecture and industry. The failure of which is costly and dangerous. Typically made with carbon steel rebars, corrosion resistant alloys provide an alternative method of delaying failure. Stainless steels, while more expensive than carbon steels, provide excellent corrosion resistance, but less is known about the long term monitoring of corrosion activity for stainless steel than for carbon steel. This study looks at samples prepared between 2005 and 2009 using 304SS, 316SS, and 2304SS rebars, as well as SMI and Stelax stainless steel clad carbon steel reinforcements embedded in three different concrete mixes. These selected samples are split into two exposure environments, inside humidity chambers within the laboratory and outdoor exposure. Measurements reported here were made monthly over the course of 250 plus days using the Galvanostatic Pulse method, Electrochemical Impedance Spectroscopy, and a Gecor 8 device. These methods were used to determine corrosion current, isolated corrosion current density, and solution resistance. Corrosion current density values calculated from measurements by the Galvanostatic Pulse and Electrochemical Impedance Spectroscopy method are too small to indicate corrosion, based on value ranges provided by Andrade. However, Gecor 8 corrosion current density values indicate low levels or moderate levels of corrosion for all samples compared to the Andrade’s value ranges. The area used by the Gecor is unknown, so it’s possible this is driving up the measured values.
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Date Issued: 2023
PURL: http://purl.flvc.org/fau/fd/FA00014258
Subject Headings: Reinforced concrete, Corrosion resistant alloys, Carbon steel, Corrosion
Format: Document (PDF)

Title: Production and off-bank transport of carbonate sediment, black rock, southwest Little Bahama Bank.
Creator: Hoskin, Charles M., Reed, John K., Mook, David H.
Date Issued: 1986
PURL: http://purl.flvc.org/FCLA/DT/3353776
Subject Headings: Little Bahama Bank (Bahamas), Sediments (Geology), Carbonates, Echinometra lucunter, Halimeda, Chitons
Format: Document (PDF)

Title: LiOH absorber model testing in underwater life support systems.
Creator: Wang, Tsen C., Liou, M. C., Hendry, C., Harbor Branch Oceanographic Institute
Date Issued: 1988
PURL: http://purl.flvc.org/fau/fd/FA00007496
Subject Headings: Lithium hydroxide, Axial flow, Scrubber (Chemical technology), Carbon dioxide, Ocean engineering, Life Support Systems
Format: Document (PDF)

Title: Computer program for lithium hydroxide - carbon dioxide absorption in underwater life support systems.
Creator: Wang, Tsen C., Liou, M. C., Hendry, C., Harbor Branch Oceanographic Institute
Date Issued: 1989
PURL: http://purl.flvc.org/fau/fd/FA00007497
Subject Headings: Lithium hydroxide, Carbon dioxide--Absorption and adsorption, Life Support Systems, Ocean engineering
Format: Document (PDF)

Title: Modeling of axial flow canisters for carbon dioxide-lithium hydroxide absorption in underwater life support systems.
Creator: Liou, M. C., Wang, Tsen C., Harbor Branch Oceanographic Institute
Date Issued: 1987
PURL: http://purl.flvc.org/fau/fd/FA00007494
Subject Headings: Life Support Systems, Carbon dioxide--Absorption and adsorption, Lithium hydroxide, Axial flow, Ocean engineering
Format: Document (PDF)

Title: Organic-free water for total organic carbon determination.
Creator: Peterson, Gary N., Montgomery, John R., Harbor Branch Oceanographic Institute
Date Issued: 1980
PURL: http://purl.flvc.org/FCLA/DT/3331814
Subject Headings: Water--Organic compound content, Water--Carbon content--Measurement, UV radiation
Format: Document (PDF)

Title: Combined temperature and water vapor effects on the lithium hydroxide-carbon dioxide reaction in underwater life support systems.
Creator: Wang, Tsen C., Bricker, J. L., Harbor Branch Oceanographic Institute
Date Issued: 1979
PURL: http://purl.flvc.org/FCLA/DT/3353725
Subject Headings: Carbon dioxide, Lithium hydroxide, Life Support Systems, Temperature, Water vapor, Humidity
Format: Document (PDF)

Title: A 13C/12C comparison of food webs in Caribbean seagrass meadows and coral reefs.
Creator: Fry, B., Lutes, R., Northam, M., Parker, P. L., Harbor Branch Oceanographic Institute
Date Issued: 1982
PURL: http://purl.flvc.org/FCLA/DT/3331838
Subject Headings: Carbon--Isotopes--Analysis, Seagrasses, Coral reefs and islands--Caribbean Area, Food webs
Format: Document (PDF)

Title: Carbon dioxide capture by engineering a self-sustained coral reef park with renewable energy.
Creator: Quiray, Paulane C., Raja, Umar, Athey, David, Savage, Tabatha, Suzuki, Hiroko, Egeland, Matthew, Su, Tsung-Chow
Date Issued: 2012-04-06
PURL: http://purl.flvc.org/fcla/dt/3349042
Subject Headings: Carbon Dioxide, Renewable Energy, Self-sustained coral reef park, Bio-diversity
Format: Document (PDF)

Title: Measuring temporal variability in biogenic gas content in peat soils using moisture probes.
Creator: Heij, Gerhard, Comas, Xavier
Date Issued: 2012-04-06
PURL: http://purl.flvc.org/fcla/dt/3348827
Subject Headings: Peatlands, Carbon cycle, Soil science, Environmental conditions, Geosciences, Soil moisture, Soils --analysis, Biogenic gas
Format: Document (PDF)

FAU Theses and Dissertations (42)	+ -
HBOI Faculty Contributions (30)	+ -
HBOI Technical Reports (3)	+ -
FAU Graduate Student Research (2)	+ -
FAU Undergraduate Student Research (2)	+ -

Carbon (14)	+ -
Carbon dioxide (9)	+ -
Carbon fibers (7)	+ -
Lithium hydroxide (7)	+ -
Nitrogen (7)	+ -

Life Support Systems (6)	+ -
Carbon dioxide--Absorption and adsorption (5)	+ -
Adsorption (4)	+ -
Carbon cycle (Biogeochemistry) (4)	+ -
Carbon dioxide mitigation (4)	+ -
Carbon, Activated (4)	+ -
Lithium cells (4)	+ -
Submersibles (4)	+ -
Surface chemistry (4)	+ -
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Carbon steel (3)	+ -
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Electronic Thesis or Dissertation (42)	+ -
article (30)	+ -
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poster (2)	+ -

Florida Atlantic University (40)	+ -
College of Engineering and Computer Science (28)	+ -
Department of Ocean and Mechanical Engineering (22)	+ -
Harbor Branch Oceanographic Institute (21)	+ -
Wang, Tsen C. (12)	+ -

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