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Phytoextraction Of Lead (Pb) Contaminated Soil By Switchgrass (Panicum Virgatum L): Impact Of Bap And Nta Applications, Genna Hart, Austin Gilly, Marina Koether, Thomas Mcelroy, Sigurdur Greipsson
Phytoextraction Of Lead (Pb) Contaminated Soil By Switchgrass (Panicum Virgatum L): Impact Of Bap And Nta Applications, Genna Hart, Austin Gilly, Marina Koether, Thomas Mcelroy, Sigurdur Greipsson
Faculty and Research Publications
The accumulation of Pb deposits in soil is a growing global concern. Soil remediation options include phytoextraction that involves the use of plants and associated soil microorganism. Switchgrass (Panicum virgatum L.), a second-generation bioenergy crop was used in this study due to its ability to produce high biomass and grow in metal polluted soils. Plants were grown in Pb-contaminated soil (5,802.5 mg kg−1) in an environmentally controlled greenhouse. Plants were treated with exogenous application of the plant growth regulator (PGR) benzylaminopurine (BAP) or complete foliar nutrient solution (Triple-12®) twice a week until harvested. Plants also received the soil fungicide propiconazole …
Application Of A 14c-Assay To Assess Methanotrophic Biodegradation Of Tce In Low Ph Groundwater, Evan Groome
Application Of A 14c-Assay To Assess Methanotrophic Biodegradation Of Tce In Low Ph Groundwater, Evan Groome
All Theses
Current biological strategies for remediating trichloroethylene (TCE) in low pH aquifers (i.e., pH14C-TCE assay was developed to determine pseudo first-order rate constants for the degradation of TCE in microcosms containing soil and groundwater from the Boeing Michigan Aeronautical Research Center (BOMARC) superfund site, where the pH ranges from 4.1 to 4.9. The 14C-TCE assay was also adapted to calculate soil-normalized rate constants for data from this site, as well as data that Szwast21 collected from the Beltsville Agricultural Research Center (BARC). In addition to natural attenuation, biostimulation through amendments of methane and nutrients were also assessed. This treatment …
Floating Treatment Wetlands For Brackish Waters: Plant Selection And Nutrient Uptake Potential., Andrea Landaverde
Floating Treatment Wetlands For Brackish Waters: Plant Selection And Nutrient Uptake Potential., Andrea Landaverde
All Theses
Brackish water bodies in coastal regions provide critical ecosystem services that support human and environmental health. Anthropogenic activities such as agricultural and industrial activities, construction, urban settlements, and tourism contribute to increased inputs of nitrogen (N) and phosphorus (P) in brackish coastal ecosystems. Excess nutrients can lead to impaired water quality and affect marine organisms. Floating treatment wetlands (FTWs) are a vegetated-base technology used to remove contaminants from water column, that has been mainly studied and applied in freshwater systems. Application of FTWs in brackish systems requires further investigation, as high salinity in brackish waters could result in toxicity to …
Self-Sustaining Smouldering Combustion Of Granular Activated Carbon Contaminated With Per- And Polyfluoroalkyl Substances – Fluorine Mass Balance And Enhanced Methods Of Mineralization, Brian Gerald Harrison
Self-Sustaining Smouldering Combustion Of Granular Activated Carbon Contaminated With Per- And Polyfluoroalkyl Substances – Fluorine Mass Balance And Enhanced Methods Of Mineralization, Brian Gerald Harrison
Electronic Thesis and Dissertation Repository
Per- and polyfluoroalkyl substances (PFAS) are a large group of anthropogenic compounds. Long-term use has led to widespread environmental contamination, and PFAS source zones will require cleanup.
Self-sustaining Treatment for Active Remediation (STAR) is a thermal treatment technology that employs smouldering combustion as a method of soil treatment. Smouldering can be self-sustaining and is thus more energy-efficient. Previous research applying STAR to PFAS-contaminated soil and granular activated carbon (GAC) showed promise, as PFAS were removed from soil.
This study clarified the potential of STAR as a treatment option for PFAS. This study is unique in how thoroughly it characterized the …
Carbon Injection To Support In-Situ Smouldering Remediation, Gillian Wilton
Carbon Injection To Support In-Situ Smouldering Remediation, Gillian Wilton
Electronic Thesis and Dissertation Repository
Per- and polyfluoroalkyl substances (PFAS) are a group of anthropogenic contaminants that are growing increasing concern due to their associated negative health affects. The properties of PFAS result in their persistence and stability which present challenges for remediation. Activated carbon is currently the most widely used method for PFAS treatment since carbon microparticle injection can be used for in-situ treatment; however, this method does not result in PFAS destruction. Thermal treatment is a promising post-treatment method that can be used with activated carbon as long as sufficient PFAS-destroying temperatures are achieved (> 900°C). A promising in-situ thermal treatment technology is …
Hydrogen-Rich Syngas Derived From Smouldering Biomass And Hydrocarbon Wastes, Joshua K. Brown
Hydrogen-Rich Syngas Derived From Smouldering Biomass And Hydrocarbon Wastes, Joshua K. Brown
Electronic Thesis and Dissertation Repository
In the face of climate change, the world is looking to new fuel sources to meet the surging global energy demand. Hydrogen has been proposed as a promising energy vector being both a net-zero carbon emitter and having one of the highest gravimetric energy densities of known fuels. Production of hydrogen, however, is difficult with many of the technologies which exist today failing to be economically feasible or environmentally sustainable. Smouldering has recently been developed as a cost effective and energy efficient technology for destruction of organic wastes. The unique reaction zones created within a smouldering system have the potential …