Clay-based materials for passive control of ozone and reaction byproducts in buildings

dc.contributor.advisorCorsi, Richard L.
dc.contributor.committeeMemberBrown Wilson, Barbara
dc.contributor.committeeMemberJuenger, Maria
dc.contributor.committeeMemberNovoselac, Atila
dc.contributor.committeeMemberXu, Ying
dc.creatorDarling, Erin Kennedy
dc.date.accessioned2016-09-22T19:17:11Z
dc.date.available2016-09-22T19:17:11Z
dc.date.issued2016-05
dc.date.submittedMay 2016
dc.date.updated2016-09-22T19:17:11Z
dc.description.abstractTropospheric ozone that infiltrates buildings reacts readily with many indoor materials and compounds that are commonly detected in indoor air. These reactions lead to lower indoor ozone concentrations. However, the products of ozone reactions may be irritating or harmful to building occupants. While active technologies exist (i.e., activated carbon filtration in HVAC systems) to suppress indoor ozone concentrations, they can be costly and/or infeasible for dwellings that do not have these systems. Passive methods of ozone removal are an interest of building environment researchers. This dissertation involves (1) a review of the state of the knowledge on building materials and coatings that are intended to passively remove indoor ozone, especially clay-based materials; (2) a compilation of current data on ozone removal and reaction byproduct formation for these materials; (3) a model for ozone removal effectiveness for a selected clay-based material that is implemented in a hypothetical home; (4) a survey of the effects of a clay-based coating with and without ozone and a reactant source on human perceptions of air quality; (5) an investigation of the long-term potential for passive control of indoor ozone by two different clay-based surface coatings that were exposed to real indoor environments; and (6) development of a location-specific model to estimate the monetary benefits versus costs of indoor ozone control using passive removal materials. The above tasks were completed through ongoing reviews of the literature, experimental studies conducted in small and large environmental chambers, and in the field. Results of these studies suggest that clay or materials made from clay are a viable material for passive reduction of indoor pollution, due in part to clay’s ability to catalyze ozone. Human sensory perceptions of indoor air quality were shown to significantly improve when a clay-based plaster was present in an ozonated environment. Based on modeling efforts, effective passive removal of indoor ozone is possible for realistic indoor scenarios when clay-based materials are implemented. There is a growing number of papers that are published on the subject of clay materials and indoor environmental quality, but few that investigate the longer term impacts and performance of clay materials, especially ones that have been exposed to real indoor environments.
dc.description.departmentCivil, Architectural, and Environmental Engineering
dc.format.mimetypeapplication/pdf
dc.identifierdoi:10.15781/T2B853K0P
dc.identifier.urihttp://hdl.handle.net/2152/40970
dc.language.isoen
dc.subjectClay
dc.subjectModeling
dc.subjectIndoor air quality
dc.subjectLow-energy
dc.subjectPerceived air quality
dc.subjectPaint
dc.subjectPlaster
dc.subjectBuilding materials
dc.titleClay-based materials for passive control of ozone and reaction byproducts in buildings
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentCivil, Architectural, and Environmental Engineering
thesis.degree.disciplineEnvironmental and water resources engineering
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

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