Theses and Dissertations at Montana State University (MSU)
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Item Nonlinear optical studies of gypsum dissolution mechanisms, surfactant adsorption on gypsum surface and analysis of environmentally related ions(Montana State University - Bozeman, College of Letters & Science, 2023) Yiyen, Galip; Chairperson, Graduate Committee: Robert Walker; This is a manuscript style paper that includes co-authored chapters.Southeastern Montana hosts one of the largest open-air coal mine sites in the world. Federal regulations after finalization of the open-air coal mining activities require reclamation, which creates buried spoils that may serve as aquifers at former mining sites. Once hosting an inland sea, the region's saline sedimentary rocks and soils contribute to the groundwater salinity, though at lower levels prior to mining. However, the creation of spoils through mining pulverizes soils, sediment, and rocks formerly overlying coal deposits, mixing them and increasing their surface area. In infiltrating waters from snow melt and heavy rain, minerals dissolve more readily due to this enhanced surface area in spoils, increasing the salinity in groundwater. A primary water quality concern in regional groundwater is high sulfate concentrations. Sulfate in water originates from weathering and dissolution of soluble secondary salts, such as calcium sulfate (dihydrate, hemihydrate and anhydrite), sodium sulfate and magnesium sulfate. Gypsum (CaSO 4 x 2H 2O) is thought to be a primary source of dissolved sulfate in the ground and surface waters in Southeastern Montana and 'gypsum dissolution' is at the focus of this dissertation. Vibrational sum frequency generation spectroscopy was used to understand the molecular level interactions at the gypsum surface upon interaction with bulk water. Additionally, surfactant adsorption on gypsum surface and its impacts of gypsum dissolution were investigated. Besides optical spectroscopy studies, an efficient and quick water analysis technique was adapted to determine the sulfate concentrations in environmental samples. Two different types of orientations of structural water molecules at the gypsum surface were observed. Results also showed that these water molecules are tightly bound to the surface. Surfactant adsorption was found to be only limited to the surfactants with sulfate headgroups and resulted in suppressed gypsum dissolution. A titration technique is found to be effective and accurate for sulfate analysis of environmental water samples.Item Coalbed methane reclamation activities in the Powder River Basin, Wyoming: social and policy dimensions of environmental legacy management(Montana State University - Bozeman, College of Letters & Science, 2020) Walsh, Kathryn Bills; Chairperson, Graduate Committee: Julia Hobson Haggerty; Julia H. Haggerty was a co-author of the article, 'Governing unconventional legacies: lessons from the coalbed methane boom in Wyoming' in 'Governing Shale Gas: Development, Citizen Participation and Decision Making in the US, Canada, Australia and Europe' which is contained within this dissertation.; Julia H. Haggerty was a co-author of the article, 'Social license to operate during Wyoming's coalbed methane boom: implications of private participation' in the journal 'Energy policy' which is contained within this dissertation.; Julia H. Haggerty was a co-author of the article, 'The 'learn as you go' approach: a cautionary tale of environmental legacy management in Wyoming's coalbed methane fields' which is contained within this dissertation.The United States is producing more oil and natural gas than ever before. Sites of production are contributing to the known land-use phenomenon of energy sprawl, though little is known about how these sites will be reclaimed and how legacy effects will be governed and managed. Reclamation returns degraded energy landscapes to some productive capacity in order to avoid permanent environmental harm. Thus far, the technical aspects of reclamation have been the topic of most research while the human dimensions are under-studied. This research draws attention to the social and political dimensions of environmental legacy management. A period of coalbed methane development in the Powder River Basin, Wyoming (1999-2009) provides an instructive case study to investigate the legacy effects of energy resource development. After a decade of coalbed methane production, about 5,700 orphaned wells remained without viable industry operators to fund and manage well-plugging and reclamation. This dissertation uses a qualitative case study approach including document analysis, policy analysis, and forty semi-structured interviews with local surface owners, attorneys, state and federal regulators, local government officials, and industry personnel. Contextual research revealed that management of post-production oil and gas is a highly complex governance challenge made more complicated by the split estate property regime that characterizes the American West. Empirical research found that environmental legacy issues are exacerbated by 'private participation'. Applying a framework tied to the concept of social license to operate, investigation of surface owner-industry relations revealed that individuals played a critical role in decision-making processes. Surface owner's private participation resulted in decisions to forgo reclamation and integrate CBM-related infrastructure into ranching operations, therefore contributing to the scale and extent of environmental legacies. This dissertation also found that an adaptive, or 'learn as you go', policy approach in Wyoming enabled cost-shifting mechanisms to gain foothold, creating serious long-term environmental costs. Three specific cost-shifting mechanisms for CBM were identified: regulatory misalignment, overadaptation to the oil and gas industry, and industry bankruptcy. Together this dissertation highlights the importance of studying the social and political dimensions of post-production oil and gas activities for more effective environmental legacy management.Item The influence of mine reclamation and highway reconstruction activities on grizzly bear habitat selection in the Cooke City basin, Montana(Montana State University - Bozeman, College of Agriculture, 2016) Rossi, Joao Luiz; Chairperson, Graduate Committee: Bok SowellThe grizzly bear (Ursus arctos) population of the Greater Yellowstone Ecosystem is increasing in numbers and expanding its range. In this scenario, the number of conflicts between humans and grizzly bears is likely to increase. Understanding how grizzly bear habitat selection is affected by concentrated high human use, such as construction projects, plays a major role in management decisions for this species. In this research, we combined bear sign data collected in 27 permanent transects during 11 years (1990-91, 1996-97, 2003-04, and 2007-11) with food habits analysis to provide a description of grizzly bear habitat use in 91km 2 of the Cooke City Basin, Montana. Data were collected during years of mine reclamation (2003-04), highway reconstruction (2007-09), and years when no major human activities occurred (1990-91, 1996-97, and 2010-11). The main objectives of this study were to quantify grizzly bear spatial avoidance to mine reclamation and highway reconstruction activities and provide knowledge about environmental factors influencing grizzly bear habitat in the Basin. Resource selection functions were used to address these goals. Results showed that, in the Cooke City Basin, grizzly bears selected for mid-high elevation, forested, south-west facing slopes (areas where whitebark pine seeds are most abundant) and avoided areas of high tertiary road density. Mine reclamation occurred near whitebark pine forests. The estimated grizzly bear use of areas within 1 km and 2 km of reclamation epicenters decreased 83% and 52%, respectively, in years of mine reclamation. Grizzly bears did not avoid areas beyond 2 km of mine reclamation or areas within 4 km of highway reconstruction in years when these activities occurred. The lack of avoidance associated with highway reconstruction is likely explained by the fact that this occurred in the lowest elevation areas (below 2500 m) that are used less by grizzly bears. Grizzly bears use in the Cooke City Basin were mostly uninterrupted by two major construction projects. However, temporary and localized habitat loss occurred when construction was focused near whitebark forests with high bear use. Temporary habitat loss was not observed when construction occurred in areas distant from whitebark forests and used less by bears.Item Reclamation practices in the Northern Great Plains(Montana State University - Bozeman, 1977) Jennings, Lewis PeterItem Rehabilitation of pronghorn habitat on surface mines of the northern Great Plains(Montana State University - Bozeman, 1983) Zimmerman, George MichaelItem Interactive effects between lime, organic matter, and bacteria in the establishment of Leymus cinereus in mine tailings(Montana State University - Bozeman, College of Agriculture, 2015) Sanchez Espinoza, Deicy Noemi; Chairperson, Graduate Committee: Anthony HartshornThe landscape legacy of historical metal-mining activity can persist for decades. The most frequent strategies used for the remediation of contaminated soils include: the use of synthetic membranes to isolate contaminants (>$0.5 million/acre), direct revegetation (less expensive but difficult to sustain), or lime amendments ($5000/acre). Looking for more cost-effective bioremediation approaches, we performed a set of greenhouse studies to determine what combinations of soil amendments would lead to the best vegetative response, and potentially associated reductions in soil arsenic (As) levels, in "slickens" collected from the Lampert Ranch along the upper Clark Fork near Warm Springs, MT. In our first greenhouse experiment, we planted Leymus cinereus (basin wildrye) and compared (after 12 weeks) plant growth and foliar metal concentrations across treatments. Amendments included single or factorial additions of 5% lime, organic matter (+OM), and an arsenic-oxidizing (+oxbact) strain of Agrobacterium tumefaciens (Agtu). Surprisingly, the OM+oxbact treatment revealed among the best plant growth and arsenic uptake response. We then performed a second greenhouse experiment with two levels of OM (1.5% and 5%) and an additional treatment: a mutant (reducing strain) of Agtu. Basin wildrye grown in soils amended with 5% OM generally did better than those grown in soils amended with 1.5% OM. At the same time, foliar As uptake (biomass multiplied by As concentration) was unexpectedly high (0.020 mg pot-1) for plants grown in soils amended with 5% OM + oxbact, 3 times greater than foliar arsenic uptake in plants grown in soils amended with 5% OM+ lime and 4 times greater than foliar uptake by plants grown in soils amended with 5% OM and the reducing strain of Agtu. These results suggest the combination of OM and Agtu oxbact strain could provide a potentially cost- effective approach to remediating As-contaminated soils. Finally, our study results imply that soil restoration approaches could be improved through a greater consideration of microbial communities supported by these re-establishing vegetation communities, which could lead to more sustainable ecosystem successional trajectories.Item Reclamation of abandoned bentonite mine spoils with phosphogypsum and magnesium chloride amendments(Montana State University - Bozeman, College of Agriculture, 1988) Smith, Steven Carl; Chairperson, Graduate Committee: Douglas J. DollhopfAbandoned bentonite mine spoils are scattered over southeast and north central Montana. The clayey, saline-sodic nature of these spoils creates adverse physicochemical properties. Invasion of native plant species is precluded and revegetation is difficult. Infiltration of surface water is severely limited due to surface crusting and shrink-swell processes. Chemical amendments have recently been shown to be effective in ameliorating adverse physical and chemical spoil properties. Chemical amendment use increases reclamation costs significantly, therefore effective, low cost amendments are needed. Phosphpgypsum and magnesium chloride brine are low cost industrial wastes that have not been tested for use in land reclamation. Experimental field plots were implemented to evaluate the effects of phosphogypsum (40.4 mt/ha) and magnesium chloride brine (36.2 mt/ha) incorporated to a 35 cm depth. Effects of nitrogen fertilizer (0, 67 kg/ha, and 134 kg/ha) on seedling emergence were also tested. Representative unamended spoil at the site had a sodium adsorption ratio (SAR) of 33.8 and an electrical conductivity (EC) of 8.0 mmhos/cm. Over a 14 month sampling period, SAR (0-5 cm) declined to 24.5 on phosphogypsum treated plots, and to 21.3 on magnesium chloride brine treated plots. Electrical conductivity (0-5 cm) increased to 10.1 mmhos/cm on phosphogypsum treated plots, and to 15.9 mmhos/cm on magnesium chloride brine treated plots. Following 30 minutes of simulated rainfall, minesoil infiltration rates were 2.8 cm/hr on phosphogypsum treated plots and 3.8 cm/hr on magnesium chloride brine treated plots, compared to .1 cm/hr on unamended spoil. Nitrogen fertilizer at 67 kg/ha resulted in significantly greater seedling density among fertilizer treatments, at 192 seedlings/m^2. Plant canopy cover of 39% estimated on magnesium chloride brine treated plots was significantly greater than 28% on phosphogypsum treated plots. Above ground plant production was 1753 kg/ha on phosphogypsum treated plots and 2717 kg/ha on magnesium chloride brine treated plots. Production of pioneering (non-seeded) annual forbs comprised 60% of total production on phosphogypsum treated plots and 83% on magnesium chloride brine treated plots.Item Reclamation of calcareous saline-sodic soils in southcentral Montana with by-product sulfuric acid(Montana State University - Bozeman, College of Agriculture, 1979) Cates, Richard LymanItem The potential for dryland alfalfa on minesoils in southeastern Montana(Montana State University - Bozeman, College of Agriculture, 1985) Postle, Robert CairnsItem A Comparison of greenhouse methods as diagnostic tools for reclamation planning(Montana State University - Bozeman, College of Agriculture, 1984) Byron, Timothy Martin