Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"carbon mineralization"”.
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Microbial ecology of anaerobic carbon mineralization in Namibian shelf sediments
… the primary aims of the thesis are to study carbon transformation processes within the sediment, determine the reactivity of organic carbon in the sediment and, investigate the control of microbial community structure and activity by the amount and accessibility of carbon sources. The …
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Investigation of Ex-Situ Carbon Mineralization Fundamentals andScalability in Wet Supercritical Carbon Dioxide
… is an urgent yet technically complex goal. Carbon mineralization, the trapping of carbon dioxide in the mineral phase via reaction with magnesium/calcium-rich silicates to form carbonates, is a promising method to offset carbon emissions. In addition to the reaction with carbon dioxide …
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A Measurement of Conservation Agriculture’s Effect on Nitrogen and Carbon Mineralization Rates for Agricultural Recommendations in Haiti’s Central Plateau
… help provide soil cover and increase nutrient mineralization are one of the most potentially beneficial changes that could be made on most smallholder farms. However, before specific cover crop recommendations can be made, their potential benefits need to be quantified. One field experiment in …
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MULTI-MODAL INTEGRATED CARBON DIOXIDE CAPTURE AND MINERALIZATION PATHWAYS FOR SUSTAINABLE HYDROGEN PRODUCTION
Scalable decarbonization efforts require the production of low-carbon hydrogen energy alternatives. Currently, more than 80% of hydrogen is produced via steam methane reforming (SMR) followed by water gas shift reaction (WGSR) pathway that produces significant CO2 emissions, regardless of the use …
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Carbon dioxide emissions from selected soils in Zambia : effects of nitrogenous fertilizer and agricultural lime.
… can serve as sources or sinks of atmospheric carbon dioxide (CO2) depending on how they are managed. As atmospheric CO2 concentrations continue to rise there is need to find ways of reducing CO2 emissions from soils. This study was conducted to assess the effects of applying agricultural lime …
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Aluminium stabilizes dissolved organic matter by precipitation
It is well known that carbon mineralization in acidic forest soils can be reduced by large Al concentrations. Precipitation of dissolved organic matter (DOM) by dissolved Al could contribute substantially to C retention in acidic forest soils. However, no information is available on the properties …
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Numerical Investigations of Geologic CO2 Sequestration Using Physics-Based and Machine Learning Modeling Strategies
Carbon capture and sequestration (CCS) is an engineering-based approach for mitigating excess anthropogenic CO2 emissions. Deep brine aquifers and basalt reservoirs have shown outstanding performance in CO2 storage based on their global widespread distribution and large storage capacity. Capillary …
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Bacterial Assemblages And Microbial Enzyme Activity In The Major Tributaries Of The Lower Mississippi River
… and allochthonous nutrients. Bacteria dominate carbon cycling and nutrient processing in rivers, and therefore can influence regional and global elemental cycles. This study characterized the structure of bacterial assemblages of the major tributaries to the lower Mississippi River using high …
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Buried Surface Horizons in Saskatchewan Croplands Provide Insight into Microbial Soil Carbon Cycling and Development of Persistent Organic Matter
… the susceptibility of SOC in Ahb horizons to mineralization to CO2 was 4x lower than corresponding Ah horizons. Carbon mineralization was strongly correlated with mineral-associated organic matter (Rho = -0.67, p < 0.01) in Ah horizons but not in Ahb horizons. Microbial community structure in …
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Iron reduction mediated increases in carbon oxidation and phosphorus precipitation in on-site wastewater systems
… and fermentation is the dominant process driving carbon transformation. Moreover, phosphorus, a major nutrient that causes eutrophication, accumulates in onsite wastewater systems from human and domestic wastes. Phosphate is of particular interest because of its growth limiting effects on microbes …
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Nitrogen dynamics and biological response to dairy manure application
… injection of dairy slurry on nitrogen and carbon cycling, crop yield, and biologic responses to proxy soil health. In a forced air-flow laboratory incubation, manure injection reduced ammonia volatilization by 87% and 98% in a sandy loam and clay loam soil, respectively. The increased …
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Evaluating Conservation Agricultural Management for Soil Health Outcomes in Southeastern Virginia
… depth to root restrictive layer), total organic carbon, carbon stocks, saturated hydraulic conductivity, and yield were measured repeatedly over a seven-year period to better understand the longitudinal response of these properties to management. Bulk density and saturated hydraulic conductivity …
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Optimisation of anaerobic digestion of organic solid waste for the production of quality compost for soil amendment
… improved water retention, water infiltration, carbon mineralization and assimilation and significantly increased the soil biomass and bioactivity. Plant growth tests showed that the anaerobic digestate compost significantly increased plant heights, number o f leaves and dry matter contents. In …