Browsing by Author "Phillips, Daniel"
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Item Characterization of Carbon Dioxide Removal using Ionic Liquids in Novel Geometries(47th International Conference on Environmental Systems, 2017-07-16) Arquilla, Katya; Rundle, Tessa; Phillips, Daniel; Lampe, Alexander; Shaffer, Brett; Lima, Anthony; Fritz, Trevor; Denton, Jacob; Dixon, Jordan; Holquist, Jordan; Lotto, Michael; Nabity, JamesThe Cabin Atmosphere Revitalization through Ionic Liquids (CARIL) project is part of NASA's Exploration Systems and Habitation Academic Innovation Challenge program to provide enabling technologies for future long-duration space missions. Current atmosphere revitalization technologies require frequent maintenance and spare parts – these are not manageable issues for technologies used on missions travelling to Mars and beyond. As the possibility for resupply decreases with long-duration missions, regenerable technologies become increasingly important. CARIL is focused on the characterization of the removal of carbon dioxide (CO2) from the cabin atmosphere using two different absorption bed configurations: a 3-D printed capillary-driven contactor and a hollow-fiber contactor. A flat plate contactor will be used as an experimental control, and all designs will use the ionic liquid (IL) 1-butyl-3-methylimidazolium acetate. ILs were chosen due to their low vapor pressure and selectivity between CO2 and oxygen, making them a viable option for absorbing CO2 in micro-gravity. The focus of this research is to characterize the absorption of CO2 using specific contactor materials and geometries to provide a broad range of data to analyze and inform the future development of supported ionic liquid membranes.Item Integrating Stormwater Ecosystem Services into Local Governance: Content Analysis of Municipal Comprehensive Plans and Land Development Regulations in the Austin-San Antonio Corridor(2023-08) Craig, Danielle; Phillips, Daniel; Horsford, Jared; Hardberger, AmyContinued population growth in Texas drives urban development. Conventional development patterns typically produce large quantities of impervious surfaces that disrupt natural hydrological processes when it rains. Increased impervious surfaces tend to increase the volume and rate of stormwater runoff, leading to flooding conditions and decreasing stormwater quality as stormwater flows across urban surfaces and picks up pollutants. Precipitation events in urban areas thus provide opportunities for addressing quantity and quality issues of stormwater runoff at the local level through municipal planning and regulation. Ecosystem services related to stormwater (i.e., flood prevention, flood mitigation, and stormwater purification) have been recognized as valuable assets that provide irreplaceable services, but these invaluable services are not consistently recognized and incorporated into stormwater management systems in Texas municipalities. This study seeks to address whether cities in the Austin-San Antonio corridor, have political and legal frameworks established that enable the implementation of stormwater ecosystem services in current and future land development by examining comprehensive plans and land development regulations using content analysis.Item Introducing GI to improve water quality of public waterbodies in Dhaka(2022-08) Datta, Shuvo; Phillips, Daniel; Monsur, Muntazar; Bernard, Eric; Horsford, JaredThe human and ecological health problems associated with water pollution in developing countries are central. The surface water area of densely populated Dhaka, the capital of Bangladesh, is about 10-15% of the city’s total land area. However, the primary surface water bearer (canals, lakes, ponds, and rivers) is severely degraded due to indiscriminate discharge of untreated sewage, solid waste, and industrial effluent. Past approaches to water security and management through predominantly gray infrastructure solutions are inadequate given the impacts of climate change and the adverse environmental effects of gray water infrastructure. Green Infrastructure (GI) is a strategically planned network of natural and semi-natural areas designed and managed to mitigate floods, improve water quality, stop green gentrification, and protect biodiversity in urban settings. Plants are an essential part of GI, and the idea to purify water through plants methodically is a new idea for Dhaka. Some plants remove nutrients from the stormwater and transpire water, while their roots help maintain the porosity of the filter media. This research hypothesized that introducing nature-based solutions like GI would improve water quality increasing people's engagement with the public water bodies in the city. Through modeling and simulations using ArcGIS pro and PCSWMM, this study will design GI prototypes in strategic locations and measure quantitative impact to convince future designers to propose GI inside the city. The proposal will be constructed by collaborating with private firms and stakeholders to test the authenticity of the simulation and what adjustments need to be made in further research.